{"id":88726,"date":"2025-06-30T16:51:20","date_gmt":"2025-06-30T09:51:20","guid":{"rendered":"https:\/\/itviec.com\/blog\/?p=88726"},"modified":"2025-06-30T16:51:23","modified_gmt":"2025-06-30T09:51:23","slug":"ajax-jquery-la-gi","status":"publish","type":"post","link":"https:\/\/itviec.com\/blog\/ajax-jquery-la-gi\/","title":{"rendered":"AJAX jQuery l\u00e0 g\u00ec: H\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng chi ti\u1ebft cho ng\u01b0\u1eddi m\u1edbi"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed9i dung b\u00e0i vi\u1ebft<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/itviec.com\/blog\/ajax-jquery-la-gi\/#AJAX_jQuery_la_gi\" >AJAX jQuery l\u00e0 g\u00ec?&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/itviec.com\/blog\/ajax-jquery-la-gi\/#3_phuong_thuc_pho_bien_cua_AJAX_trong_jQuery\" >3 ph\u01b0\u01a1ng th\u1ee9c ph\u1ed5 bi\u1ebfn c\u1ee7a AJAX trong jQuery&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/itviec.com\/blog\/ajax-jquery-la-gi\/#Huong_dan_su_dung_AJAX_jQuery_trong_lap_trinh_web\" >H\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng AJAX jQuery trong l\u1eadp tr\u00ecnh web&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/itviec.com\/blog\/ajax-jquery-la-gi\/#So_sanh_AJAX_jQuery_va_Nhung_giai_phap_thay_the_hien_dai\" >So s\u00e1nh AJAX jQuery v\u00e0 Nh\u1eefng gi\u1ea3i ph\u00e1p thay th\u1ebf hi\u1ec7n \u0111\u1ea1i<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/itviec.com\/blog\/ajax-jquery-la-gi\/#Nhung_loi_thuong_gap_khi_su_dung_AJAX_jQuery\" >Nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi s\u1eed d\u1ee5ng AJAX jQuery&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/itviec.com\/blog\/ajax-jquery-la-gi\/#Cac_cau_hoi_thuong_gap_ve_AJAX_jQuery\" >C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 AJAX jQuery<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/itviec.com\/blog\/ajax-jquery-la-gi\/#Tong_ket_ve_AJAX_jQuery\" >T\u1ed5ng k\u1ebft v\u1ec1 AJAX jQuery&nbsp;<\/a><\/li><\/ul><\/nav><\/div>\n\n<p><strong><em>AJAX jQuery cho ph\u00e9p c\u1eadp nh\u1eadt t\u1eebng ph\u1ea7n c\u1ee7a trang web, t\u1ea3i d\u1eef li\u1ec7u t\u1eeb m\u00e1y ch\u1ee7 v\u00e0 g\u1eedi d\u1eef li\u1ec7u \u0111\u1ebfn m\u00e1y ch\u1ee7 trong n\u1ec1n, t\u1ea5t c\u1ea3 \u0111\u1ec1u di\u1ec5n ra m\u00e0 kh\u00f4ng l\u00e0m gi\u00e1n \u0111o\u1ea1n tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng. V\u1eady c\u00e1ch s\u1eed d\u1ee5ng AJAX trong jQuery nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 hi\u1ec7u qu\u1ea3? C\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u00f4ng d\u1ee5ng v\u00e0 c\u00e1ch \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n trong l\u1eadp tr\u00ecnh front-end hi\u1ec7n \u0111\u1ea1i nh\u01b0 th\u1ebf n\u00e0o?<\/em><\/strong><\/p>\n\n\n\n<p>\u0110\u1ecdc b\u00e0i vi\u1ebft sau \u0111\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p chi ti\u1ebft v\u1ec1:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T\u1ed5ng quan v\u1ec1 AJAX v\u00e0 jQuery<\/li>\n\n\n\n<li>Ph\u01b0\u01a1ng th\u1ee9c c\u1ed1t l\u00f5i c\u1ee7a AJAX jQuery<\/li>\n\n\n\n<li>H\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng AJAX jQuery trong l\u1eadp tr\u00ecnh web<\/li>\n\n\n\n<li>So s\u00e1nh AJAX jQuery v\u00e0 nh\u1eefng gi\u1ea3i ph\u00e1p thay th\u1ebf hi\u1ec7n \u0111\u1ea1i&nbsp;<\/li>\n\n\n\n<li>Nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi s\u1eed d\u1ee5ng AJAX jQuery<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-ajax-jquery-la-gi-nbsp\"><span class=\"ez-toc-section\" id=\"AJAX_jQuery_la_gi\"><\/span><strong>AJAX jQuery l\u00e0 g\u00ec?&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u01b0\u1edbc ti\u00ean ITviec s\u1ebd gi\u1ea3i \u0111\u00e1p cho b\u1ea1n AJAX v\u00e0 jQuery l\u00e0 g\u00ec. Sau \u0111\u00f3 ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u t\u1ea1i sao AJAX jQuery v\u1eabn \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong ph\u00e1t tri\u1ec3n web hi\u1ec7n \u0111\u1ea1i ngay c\u1ea3 khi c\u00f3 nhi\u1ec1u c\u00f4ng ngh\u1ec7 m\u1edbi xu\u1ea5t hi\u1ec7n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-ajax-la-gi\"><strong>AJAX l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n<p>AJAX (Asynchronous JavaScript and XML) l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt ph\u00e1t tri\u1ec3n web cho ph\u00e9p c\u1eadp nh\u1eadt t\u1eebng ph\u1ea7n c\u1ee7a trang web m\u00e0 kh\u00f4ng c\u1ea7n t\u1ea3i l\u1ea1i to\u00e0n b\u1ed9 trang. C\u00f4ng ngh\u1ec7 n\u00e0y t\u1ea1o ra kh\u1ea3 n\u0103ng giao ti\u1ebfp v\u1edbi m\u00e1y ch\u1ee7 \u1edf ch\u1ebf \u0111\u1ed9 n\u1ec1n, gi\u00fap trang web ph\u1ea3n h\u1ed3i nhanh h\u01a1n v\u00e0 gi\u1ea3m th\u1eddi gian ch\u1edd. AJAX kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh ri\u00eang bi\u1ec7t m\u00e0 l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a nhi\u1ec1u c\u00f4ng ngh\u1ec7 web nh\u01b0 JavaScript, XML, <a href=\"https:\/\/itviec.com\/blog\/json-la-gi\/\">JSON<\/a>, HTML, v\u00e0 CSS.<\/p>\n\n\n\n<p>Th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i c\u1ee7a AJAX l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng XMLHttpRequest (ho\u1eb7c c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng hi\u1ec7n \u0111\u1ea1i nh\u01b0 Fetch API), cho ph\u00e9p JavaScript g\u1eedi y\u00eau c\u1ea7u HTTP \u0111\u1ebfn m\u00e1y ch\u1ee7 web v\u00e0 truy xu\u1ea5t d\u1eef li\u1ec7u t\u1eeb m\u00e1y ch\u1ee7 sau khi trang \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ea3i.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em>Xem th\u00eam: <\/em><a href=\"https:\/\/itviec.com\/blog\/ajax-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\"><em><strong>AJAX l\u00e0 g\u00ec? Quy tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng v\u00e0 th\u1ef1c h\u00e0nh AJAX d\u1ec5 hi\u1ec3u cho Web Developer<\/strong><\/em><\/a><\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jquery-la-gi\"><strong>jQuery l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n<p>jQuery l\u00e0 m\u1ed9t th\u01b0 vi\u1ec7n JavaScript nh\u1eb9, \u0111a n\u1ec1n t\u1ea3ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c l\u1eadp tr\u00ecnh JavaScript ph\u00eda client. V\u1edbi c\u00fa ph\u00e1p ng\u1eafn g\u1ecdn v\u00e0 d\u1ec5 hi\u1ec3u, jQuery gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a nhi\u1ec1u t\u00e1c v\u1ee5 ph\u1ee9c t\u1ea1p nh\u01b0 DOM manipulation, x\u1eed l\u00fd s\u1ef1 ki\u1ec7n, t\u1ea1o hi\u1ec7u \u1ee9ng v\u00e0 \u0111\u1eb7c bi\u1ec7t l\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c y\u00eau c\u1ea7u AJAX.&nbsp;<\/p>\n\n\n\n<p>M\u1eb7c d\u00f9 c\u00f3 nhi\u1ec1u framework hi\u1ec7n \u0111\u1ea1i, nh\u01b0ng jQuery v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng kh\u00e1 ph\u1ed5 bi\u1ebfn trong l\u1eadp tr\u00ecnh web hi\u1ec7n nay. Tuy nhi\u00ean, do s\u1ef1 ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng c\u1ee7a c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi, c\u00f3 th\u1ec3 khi\u1ebfn c\u00e1c l\u1eadp tr\u00ecnh vi\u00ean chuy\u1ec3n h\u01b0\u1edbng \u0111\u1ebfn c\u00e1c th\u01b0 vi\u1ec7n v\u00e0 framework kh\u00e1c.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em>Xem th\u00eam: <strong><a href=\"https:\/\/itviec.com\/blog\/jquery-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Nh\u1eefng \u0111i\u1ec1u c\u1ea7n bi\u1ebft v\u1ec1 jQuery \u2013 Th\u01b0 vi\u1ec7n Javascript h\u00e0ng \u0111\u1ea7u<\/a><\/strong><\/em><\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-v\u1eady-ajax-jquery-la-gi-nbsp\"><strong>V\u1eady AJAX jQuery l\u00e0 g\u00ec?&nbsp;<\/strong><\/h3>\n\n\n\n<p><strong>AJAX jQuery l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa k\u1ef9 thu\u1eadt AJAX v\u00e0 th\u01b0 vi\u1ec7n jQuery, cung c\u1ea5p m\u1ed9t b\u1ed9 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u0111\u01a1n gi\u1ea3n v\u00e0 m\u1ea1nh m\u1ebd \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c y\u00eau c\u1ea7u HTTP kh\u00f4ng \u0111\u1ed3ng b\u1ed9<\/strong>.<\/p>\n\n\n\n<p>jQuery \u0111\u00e3 tr\u1eebu t\u01b0\u1ee3ng h\u00f3a s\u1ef1 ph\u1ee9c t\u1ea1p c\u1ee7a AJAX thu\u1ea7n <a href=\"https:\/\/itviec.com\/blog\/javascript-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">JavaScript<\/a>, cung c\u1ea5p API tr\u1ef1c quan nh\u01b0 <code>$.ajax()<\/code>, <code>$.get()<\/code>, <code>$.post()<\/code>, <code>$.getJSON()<\/code>, <code>$.load()<\/code> v\u00e0 nhi\u1ec1u ph\u01b0\u01a1ng th\u1ee9c kh\u00e1c \u0111\u1ec3 d\u1ec5 d\u00e0ng t\u01b0\u01a1ng t\u00e1c v\u1edbi m\u00e1y ch\u1ee7.&nbsp;<\/p>\n\n\n\n<p>Th\u01b0 vi\u1ec7n jQuery cung c\u1ea5p m\u1ed9t b\u1ed9 c\u00f4ng c\u1ee5 AJAX to\u00e0n di\u1ec7n cho ph\u00e9p l\u1eadp tr\u00ecnh vi\u00ean t\u1ea3i d\u1eef li\u1ec7u t\u1eeb m\u00e1y ch\u1ee7 v\u00e0 c\u1eadp nh\u1eadt c\u00e1c ph\u1ea7n c\u1ee7a trang web m\u1ed9t c\u00e1ch m\u01b0\u1ee3t m\u00e0 m\u00e0 kh\u00f4ng c\u1ea7n t\u1ea3i l\u1ea1i trang. \u0110i\u1ec3m m\u1ea1nh c\u1ee7a AJAX jQuery l\u00e0 kh\u1ea3 n\u0103ng x\u1eed l\u00fd t\u01b0\u01a1ng th\u00edch tr\u00ean nhi\u1ec1u tr\u00ecnh duy\u1ec7t kh\u00e1c nhau, gi\u00fap l\u1eadp tr\u00ecnh vi\u00ean kh\u00f4ng ph\u1ea3i lo l\u1eafng v\u1ec1 s\u1ef1 kh\u00e1c bi\u1ec7t trong c\u00e1ch tr\u00ecnh duy\u1ec7t x\u1eed l\u00fd c\u00e1c y\u00eau c\u1ea7u XMLHttpRequest.&nbsp;<\/p>\n\n\n\n<p>Tuy c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi nh\u01b0 Fetch API v\u00e0 c\u00e1c th\u01b0 vi\u1ec7n nh\u01b0 Axios ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn nh\u1edd t\u00ednh linh ho\u1ea1t v\u00e0 h\u1ed7 tr\u1ee3 t\u1ed1t trong c\u00e1c tr\u00ecnh duy\u1ec7t hi\u1ec7n \u0111\u1ea1i, AJAX jQuery v\u1eabn gi\u1eef v\u1ecb tr\u00ed quan tr\u1ecdng trong ph\u00e1t tri\u1ec3n web, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c d\u1ef1 \u00e1n c\u1ea7n t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c tr\u00ecnh duy\u1ec7t c\u0169 ho\u1eb7c khi c\u1ea7n m\u1ed9t gi\u1ea3i ph\u00e1p \u0111\u01a1n gi\u1ea3n, nhanh ch\u00f3ng \u0111\u1ec3 tri\u1ec3n khai.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-3-ph\u01b0\u01a1ng-th\u1ee9c-ph\u1ed5-bi\u1ebfn-c\u1ee7a-ajax-trong-jquery-nbsp\"><span class=\"ez-toc-section\" id=\"3_phuong_thuc_pho_bien_cua_AJAX_trong_jQuery\"><\/span><strong>3 ph\u01b0\u01a1ng th\u1ee9c ph\u1ed5 bi\u1ebfn c\u1ee7a AJAX trong jQuery&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-ph\u01b0\u01a1ng-th\u1ee9c-ajax\"><strong>Ph\u01b0\u01a1ng th\u1ee9c $.ajax()<\/strong><\/h3>\n\n\n\n<p>Ph\u01b0\u01a1ng th\u1ee9c jQuery <code>$.ajax()<\/code> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c y\u00eau c\u1ea7u HTTP kh\u00f4ng \u0111\u1ed3ng b\u1ed9 (asynchronous HTTP requests), cho ph\u00e9p b\u1ea1n t\u1ea3i d\u1eef li\u1ec7u t\u1eeb m\u00e1y ch\u1ee7 m\u00e0 kh\u00f4ng c\u1ea7n t\u1ea3i l\u1ea1i trang web. Ph\u01b0\u01a1ng th\u1ee9c n\u00e0y cung c\u1ea5p c\u00e1ch linh ho\u1ea1t \u0111\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi m\u00e1y ch\u1ee7 t\u1eeb xa b\u1eb1ng <code>GET<\/code>, <code>POST<\/code> ho\u1eb7c c\u00e1c ph\u01b0\u01a1ng th\u1ee9c HTTP kh\u00e1c. \u0110\u1ed3ng th\u1eddi, h\u1ed7 tr\u1ee3 nhi\u1ec1u \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u kh\u00e1c nhau.<\/p>\n\n\n\n<p>C\u00fa ph\u00e1p c\u01a1 b\u1ea3n:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.ajax({name:value, name:value, ... })<\/code><\/pre>\n\n\n\n<p><strong>C\u00e1c tham s\u1ed1 (parameters) th\u01b0\u1eddng d\u00f9ng trong ph\u01b0\u01a1ng th\u1ee9c $.ajax():<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Thu\u1ed9c t\u00ednh<\/strong><\/th><th><strong>M\u00f4 t\u1ea3<\/strong><\/th><\/tr><\/thead><tbody><tr><td>method<\/td><td>X\u00e1c \u0111\u1ecbnh lo\u1ea1i y\u00eau c\u1ea7u l\u00e0 POST, GET, PUT, DELETE,&#8230; (type l\u00e0 t\u00ean c\u0169, kh\u00f4ng khuy\u1ebfn ngh\u1ecb t\u1eeb jQuery 1.9.0)<\/td><\/tr><tr><td>url<\/td><td>X\u00e1c \u0111\u1ecbnh URL m\u00e0 y\u00eau c\u1ea7u s\u1ebd \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn<\/td><\/tr><tr><td>username<\/td><td>X\u00e1c \u0111\u1ecbnh t\u00ean ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 x\u00e1c th\u1ef1c truy c\u1eadp HTTP<\/td><\/tr><tr><td>xhr<\/td><td>H\u00e0m callback \u0111\u1ec3 t\u1ea1o ho\u1eb7c t\u00f9y ch\u1ec9nh \u0111\u1ed1i t\u01b0\u1ee3ng XMLHttpRequest<\/td><\/tr><tr><td>async<\/td><td>M\u1eb7c \u0111\u1ecbnh l\u00e0 true. X\u00e1c \u0111\u1ecbnh xem request c\u00f3 b\u1ea5t \u0111\u1ed3ng b\u1ed9 hay kh\u00f4ng<\/td><\/tr><tr><td>beforeSend(xhr)<\/td><td>H\u00e0m \u0111\u01b0\u1ee3c th\u1ef1c thi tr\u01b0\u1edbc khi request \u0111\u01b0\u1ee3c g\u1eedi \u0111i<\/td><\/tr><tr><td>dataType<\/td><td>Lo\u1ea1i d\u1eef li\u1ec7u mong \u0111\u1ee3i t\u1eeb ph\u1ea3n h\u1ed3i c\u1ee7a m\u00e1y ch\u1ee7<\/td><\/tr><tr><td>error(xhr, status, error)<\/td><td>H\u00e0m \u0111\u01b0\u1ee3c th\u1ef1c thi n\u1ebfu request b\u1ecb l\u1ed7i<\/td><\/tr><tr><td>global<\/td><td>M\u1eb7c \u0111\u1ecbnh l\u00e0 true. X\u00e1c \u0111\u1ecbnh c\u00f3 k\u00edch ho\u1ea1t c\u00e1c s\u1ef1 ki\u1ec7n AJAX to\u00e0n c\u1ee5c hay kh\u00f4ng<\/td><\/tr><tr><td>ifModified<\/td><td>M\u1eb7c \u0111\u1ecbnh l\u00e0 false. Request ch\u1ec9 th\u00e0nh c\u00f4ng n\u1ebfu ph\u1ea3n h\u1ed3i \u0111\u00e3 thay \u0111\u1ed5i.<\/td><\/tr><tr><td>jsonp<\/td><td>Ghi \u0111\u00e8 h\u00e0m call back cho c\u00e1c request JSONP<\/td><\/tr><tr><td>jsonpCallback<\/td><td>X\u00e1c \u0111\u1ecbnh t\u00ean c\u1ee7a h\u00e0m callback trong y\u00eau c\u1ea7u JSONP<\/td><\/tr><tr><td>cache<\/td><td>M\u1eb7c \u0111\u1ecbnh l\u00e0 true. Ch\u1ec9 ra li\u1ec7u tr\u00ecnh duy\u1ec7t c\u00f3 n\u00ean l\u01b0u cache trang \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u kh\u00f4ng<\/td><\/tr><tr><td>complete(xhr, status)<\/td><td>H\u00e0m \u0111\u01b0\u1ee3c g\u1ecdi khi request ho\u00e0n t\u1ea5t.<\/td><\/tr><tr><td>contentType<\/td><td>M\u1eb7c \u0111\u1ecbnh l\u00e0 application\/x-www-form-urlencodedX\u00e1c \u0111\u1ecbnh lo\u1ea1i n\u1ed9i dung c\u1ee7a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c g\u1eedi<em>V\u00ed d\u1ee5: application\/json cho d\u1eef li\u1ec7u JSON<\/em><\/td><\/tr><tr><td>context<\/td><td>X\u00e1c \u0111\u1ecbnh gi\u00e1 tr\u1ecb this cho t\u1ea5t c\u1ea3 c\u00e1c callback c\u00f3 li\u00ean quan \u0111\u1ebfn AJAX<\/td><\/tr><tr><td>data<\/td><td>X\u00e1c \u0111\u1ecbnh d\u1eef li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn m\u00e1y ch\u1ee7<\/td><\/tr><tr><td>dataFilter(data,type)<\/td><td>X\u1eed l\u00fd d\u1eef li\u1ec7u ph\u1ea3n h\u1ed3i th\u00f4 t\u1eeb \u0111\u1ed1i t\u01b0\u1ee3ng XMLHttpRequest<\/td><\/tr><tr><td>password<\/td><td>X\u00e1c \u0111\u1ecbnh m\u1eadt kh\u1ea9u cho x\u00e1c th\u1ef1c truy c\u1eadp HTTP<\/td><\/tr><tr><td>processData<\/td><td>M\u1eb7c \u0111\u1ecbnh l\u00e0 true. X\u00e1c \u0111\u1ecbnh d\u1eef li\u1ec7u c\u00f3 n\u00ean \u0111\u01b0\u1ee3c chuy\u1ec3n th\u00e0nh chu\u1ed7i truy v\u1ea5n hay kh\u00f4ng<\/td><\/tr><tr><td>scriptCharset<\/td><td>X\u00e1c \u0111\u1ecbnh b\u1ed9 k\u00fd t\u1ef1 cho y\u00eau c\u1ea7u<\/td><\/tr><tr><td>success(result, status, xhr)<\/td><td>H\u00e0m \u0111\u01b0\u1ee3c g\u1ecdi khi y\u00eau c\u1ea7u th\u00e0nh c\u00f4ng<\/td><\/tr><tr><td>timeout<\/td><td>Th\u1eddi gian ch\u1edd c\u1ee5c b\u1ed9 request, \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng mili gi\u00e2y<\/td><\/tr><tr><td>traditional<\/td><td>X\u00e1c \u0111\u1ecbnh c\u00f3 s\u1eed d\u1ee5ng ki\u1ec3u tu\u1ea7n t\u1ef1 h\u00f3a tham s\u1ed1 truy\u1ec1n th\u1ed1ng hay kh\u00f4ng<\/td><\/tr><tr><td>headers<\/td><td>M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ch\u1ee9a c\u00e1c ti\u00eau \u0111\u1ec1 HTTP t\u00f9y ch\u1ec9nh.<em>V\u00ed d\u1ee5: { &#8220;Authorization&#8221;: &#8220;Bearer token&#8221; }<\/em><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u c\u00e1c v\u00ed d\u1ee5 chi ti\u1ebft c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c <code>$.ajax()<\/code> \u1edf ph\u1ea7n sau c\u1ee7a b\u00e0i vi\u1ebft.<\/p>\n\n\n\n<p>Hai ph\u01b0\u01a1ng th\u1ee9c kh\u00e1c th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 trao \u0111\u1ed5i th\u00f4ng tin gi\u1eefa client (tr\u00ecnh duy\u1ec7t) v\u00e0 server (m\u00e1y ch\u1ee7) l\u00e0 <code>GET<\/code> v\u00e0 <code>POST<\/code>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>GET<\/code>:<\/strong> D\u00f9ng \u0111\u1ec3 y\u00eau c\u1ea7u d\u1eef li\u1ec7u t\u1eeb m\u1ed9t ngu\u1ed3n c\u1ee5 th\u1ec3 tr\u00ean server. D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c g\u1eedi qua URL, n\u00ean c\u00f3 gi\u1edbi h\u1ea1n v\u1ec1 \u0111\u1ed9 d\u00e0i v\u00e0 c\u00f3 th\u1ec3 b\u1ecb l\u01b0u cache b\u1edfi tr\u00ecnh duy\u1ec7t.<\/li>\n\n\n\n<li><strong><code>POST<\/code>:<\/strong> D\u00f9ng \u0111\u1ec3 g\u1eedi d\u1eef li\u1ec7u \u0111\u1ebfn server \u0111\u1ec3 x\u1eed l\u00fd. Ph\u01b0\u01a1ng th\u1ee9c <code>POST<\/code> kh\u00f4ng bao gi\u1edd l\u01b0u cache, n\u00ean th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng khi g\u1eedi bi\u1ec3u m\u1eabu, \u0111\u0103ng k\u00fd t\u00e0i kho\u1ea3n,&#8230;.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-ph\u01b0\u01a1ng-th\u1ee9c-get-trong-jquery\"><strong>Ph\u01b0\u01a1ng th\u1ee9c $.get() trong jQuery<\/strong><\/h3>\n\n\n\n<p>Ph\u01b0\u01a1ng th\u1ee9c <code>$.get()<\/code> \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 l\u1ea5y d\u1eef li\u1ec7u t\u1eeb server b\u1eb1ng ph\u01b0\u01a1ng th\u1ee9c HTTP <code>GET<\/code>.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.get(URL, &#91;data], &#91;callback], &#91;dataType]);<\/code><\/pre>\n\n\n\n<p>Trong \u0111\u00f3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>URL (b\u1eaft bu\u1ed9c):<\/strong> L\u00e0 \u0111\u1ecba ch\u1ec9 (\u0111\u01b0\u1eddng d\u1eabn) m\u00e0 b\u1ea1n mu\u1ed1n g\u1eedi y\u00eau c\u1ea7u \u0111\u1ec3 l\u1ea5y d\u1eef li\u1ec7u.<\/li>\n\n\n\n<li><strong>data (kh\u00f4ng b\u1eaft bu\u1ed9c):<\/strong> D\u1eef li\u1ec7u g\u1eedi k\u00e8m y\u00eau c\u1ea7u, th\u01b0\u1eddng l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c chu\u1ed7i truy v\u1ea5n.<\/li>\n\n\n\n<li><strong>callback (kh\u00f4ng b\u1eaft bu\u1ed9c):<\/strong> L\u00e0 t\u00ean c\u1ee7a h\u00e0m s\u1ebd ch\u1ea1y khi y\u00eau c\u1ea7u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00e0nh c\u00f4ng.<\/li>\n\n\n\n<li><strong>dataType (kh\u00f4ng b\u1eaft bu\u1ed9c):<\/strong> Lo\u1ea1i d\u1eef li\u1ec7u mong \u0111\u1ee3i t\u1eeb server (v\u00ed d\u1ee5: json, text, html).<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>$(\"button\").click(function(){\n&nbsp;&nbsp;$.get(\"demo_test.asp\", function(data, status){\n&nbsp;&nbsp;&nbsp;&nbsp;alert(\"Data: \" + data + \"\\nStatus: \" + status);\n&nbsp;&nbsp;});\n});<\/code><\/pre>\n\n\n\n<p>Gi\u1ea3i th\u00edch v\u00ed d\u1ee5 tr\u00ean<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tham s\u1ed1 \u0111\u1ea7u ti\u00ean l\u00e0 &#8220;<code>demo_test.asp<\/code>&#8221; \u2013 \u0111\u00e2y l\u00e0 file ho\u1eb7c \u0111\u1ecba ch\u1ec9 m\u00e0 b\u1ea1n mu\u1ed1n l\u1ea5y d\u1eef li\u1ec7u t\u1eeb \u0111\u00f3.<\/li>\n\n\n\n<li>Tham s\u1ed1 th\u1ee9 hai l\u00e0 h\u00e0m callback, s\u1ebd \u0111\u01b0\u1ee3c ch\u1ea1y sau khi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ea3i th\u00e0nh c\u00f4ng.<\/li>\n\n\n\n<li><strong><code>data<\/code>: <\/strong>l\u00e0 n\u1ed9i dung m\u00e0 server tr\u1ea3 v\u1ec1.<\/li>\n\n\n\n<li><strong><code>status<\/code>:<\/strong> l\u00e0 tr\u1ea1ng th\u00e1i c\u1ee7a y\u00eau c\u1ea7u, v\u00ed d\u1ee5 nh\u01b0 &#8220;success&#8221; n\u1ebfu l\u1ea5y th\u00e0nh c\u00f4ng.<\/li>\n<\/ul>\n\n\n\n<p>Nh\u00ecn chung, ph\u01b0\u01a1ng th\u1ee9c <code>$.get()<\/code> gi\u00fap b\u1ea1n l\u1ea5y nhanh d\u1eef li\u1ec7u t\u1eeb server v\u00e0 x\u1eed l\u00fd k\u1ebft qu\u1ea3 tr\u1ea3 v\u1ec1 th\u00f4ng qua m\u1ed9t h\u00e0m callback. \u0110\u00e2y l\u00e0 c\u00e1ch r\u1ea5t ti\u1ec7n l\u1ee3i v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng trong c\u00e1c \u1ee9ng d\u1ee5ng web khi b\u1ea1n ch\u1ec9 c\u1ea7n \u0111\u1ecdc th\u00f4ng tin m\u00e0 kh\u00f4ng c\u1ea7n g\u1eedi d\u1eef li\u1ec7u l\u00ean server.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-ph\u01b0\u01a1ng-th\u1ee9c-post-trong-jquery\"><strong>Ph\u01b0\u01a1ng th\u1ee9c $.post() trong jQuery<\/strong><\/h3>\n\n\n\n<p>Ph\u01b0\u01a1ng th\u1ee9c <code>$.post()<\/code> \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 g\u1eedi y\u00eau c\u1ea7u \u0111\u1ebfn server b\u1eb1ng ph\u01b0\u01a1ng th\u1ee9c HTTP POST.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.post(URL, &#91;data], &#91;callback], &#91;dataType]);<\/code><\/pre>\n\n\n\n<p>Trong \u0111\u00f3,<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Tham s\u1ed1 URL (b\u1eaft bu\u1ed9c):<\/strong> \u0110\u1ecba ch\u1ec9 m\u00e0 b\u1ea1n mu\u1ed1n g\u1eedi y\u00eau c\u1ea7u \u0111\u1ebfn.<\/li>\n\n\n\n<li><strong>Tham s\u1ed1 data (kh\u00f4ng b\u1eaft bu\u1ed9c):<\/strong> D\u1eef li\u1ec7u b\u1ea1n mu\u1ed1n g\u1eedi k\u00e8m theo y\u00eau c\u1ea7u (th\u01b0\u1eddng l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng JavaScript ho\u1eb7c chu\u1ed7i).<\/li>\n\n\n\n<li><strong>Tham s\u1ed1 callback (kh\u00f4ng b\u1eaft bu\u1ed9c): <\/strong>T\u00ean h\u00e0m s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c thi khi y\u00eau c\u1ea7u th\u00e0nh c\u00f4ng.<\/li>\n\n\n\n<li><strong>dataType (kh\u00f4ng b\u1eaft bu\u1ed9c):<\/strong> Lo\u1ea1i d\u1eef li\u1ec7u mong \u0111\u1ee3i t\u1eeb server (v\u00ed d\u1ee5: json, text, html).<\/li>\n<\/ul>\n\n\n\n<p>V\u00ed d\u1ee5:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$(\"button\").click(function(){\n&nbsp;&nbsp;$.post(\"demo_test_post.asp\",\n&nbsp;&nbsp;{\n&nbsp;&nbsp;&nbsp;&nbsp;name: \"Donald Duck\",\n&nbsp;&nbsp;&nbsp;&nbsp;city: \"Duckburg\"\n&nbsp;&nbsp;},\n&nbsp;&nbsp;function(data, status){\n&nbsp;&nbsp;&nbsp;&nbsp;alert(\"Data: \" + data + \"\\nStatus: \" + status);\n&nbsp;&nbsp;});\n});<\/code><\/pre>\n\n\n\n<p>Gi\u1ea3i th\u00edch v\u1ec1 v\u00ed d\u1ee5 tr\u00ean:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tham s\u1ed1 \u0111\u1ea7u ti\u00ean &#8220;<code>demo_test_post.asp<\/code>&#8221; l\u00e0 \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ebfn t\u1ec7p server m\u00e0 ta mu\u1ed1n g\u1eedi d\u1eef li\u1ec7u \u0111\u1ebfn.<\/li>\n\n\n\n<li>Sau \u0111\u00f3 l\u00e0 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c g\u1eedi \u0111i: <code>name<\/code> v\u00e0 <code>city<\/code>.<\/li>\n\n\n\n<li>T\u1ec7p ASP &#8220;<code>demo_test_post.asp<\/code>&#8221; s\u1ebd nh\u1eadn d\u1eef li\u1ec7u, x\u1eed l\u00fd, r\u1ed3i tr\u1ea3 k\u1ebft qu\u1ea3 v\u1ec1.<\/li>\n\n\n\n<li>Tham s\u1ed1 th\u1ee9 ba l\u00e0 h\u00e0m callback \u2013 s\u1ebd ch\u1ea1y sau khi server ph\u1ea3n h\u1ed3i.<\/li>\n\n\n\n<li><strong><code>data<\/code><\/strong>: n\u1ed9i dung m\u00e0 server tr\u1ea3 v\u1ec1<\/li>\n\n\n\n<li><strong><code>status<\/code><\/strong>: tr\u1ea1ng th\u00e1i c\u1ee7a y\u00eau c\u1ea7u (v\u00ed d\u1ee5: &#8220;success&#8221;)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-h\u01b0\u1edbng-d\u1eabn-s\u1eed-d\u1ee5ng-ajax-jquery-trong-l\u1eadp-trinh-web-nbsp\"><span class=\"ez-toc-section\" id=\"Huong_dan_su_dung_AJAX_jQuery_trong_lap_trinh_web\"><\/span><strong>H\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng AJAX jQuery trong l\u1eadp tr\u00ecnh web&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Trong ph\u1ea7n n\u00e0y, ITviec s\u1ebd h\u01b0\u1edbng d\u1eabn c\u00e1ch s\u1eed d\u1ee5ng AJAX jQuery m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c t\u00ednh n\u0103ng web \u0111\u1ed9ng. M\u1eb7c d\u00f9 AJAX jQuery v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i, c\u00e1c c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i nh\u01b0 Fetch API \u0111ang ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn trong c\u00e1c d\u1ef1 \u00e1n m\u1edbi.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-thi\u1ebft-l\u1eadp-moi-tr\u01b0\u1eddng\"><strong>Thi\u1ebft l\u1eadp m\u00f4i tr\u01b0\u1eddng<\/strong><\/h3>\n\n\n\n<p>Tr\u01b0\u1edbc khi t\u00ecm hi\u1ec3u c\u00e1ch s\u1eed d\u1ee5ng AJAX v\u1edbi jQuery, b\u1ea1n c\u1ea7n \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u00ecnh \u0111\u00e3 thi\u1ebft l\u1eadp \u0111\u1ea7y \u0111\u1ee7 m\u00f4i tr\u01b0\u1eddng c\u1ea7n thi\u1ebft. Tr\u01b0\u1edbc ti\u00ean, b\u1ea1n c\u1ea7n th\u00eam th\u01b0 vi\u1ec7n jQuery v\u00e0o d\u1ef1 \u00e1n web c\u1ee7a m\u00ecnh. C\u00f3 hai c\u00e1ch \u0111\u1ec3 l\u00e0m \u0111i\u1ec1u n\u00e0y:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T\u1ea3i th\u01b0 vi\u1ec7n jQuery tr\u1ef1c ti\u1ebfp t\u1eeb trang web ch\u00ednh th\u1ee9c: <a href=\"https:\/\/jquery.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/jquery.com\/<\/a><\/li>\n\n\n\n<li>Ho\u1eb7c s\u1eed d\u1ee5ng li\u00ean k\u1ebft t\u1eeb Content Delivery Network (CDN), v\u00ed d\u1ee5: <code>&lt;script src=\"https:\/\/code.jquery.com\/jquery-3.6.0.min.js\"&gt;&lt;\/script&gt;<\/code><\/li>\n<\/ul>\n\n\n\n<p>Sau khi \u0111\u00e3 th\u00eam th\u01b0 vi\u1ec7n jQuery v\u00e0o trang web c\u1ee7a m\u00ecnh, b\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m tra xem th\u01b0 vi\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ea3i th\u00e0nh c\u00f4ng b\u1eb1ng c\u00e1ch ch\u1ea1y <code>console.log($)<\/code> trong console tr\u00ecnh duy\u1ec7t. B\u1ea1n c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u s\u1eed d\u1ee5ng c\u00e1c t\u00ednh n\u0103ng c\u1ee7a n\u00f3, bao g\u1ed3m c\u1ea3 ch\u1ee9c n\u0103ng AJAX \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c y\u00eau c\u1ea7u b\u1ea5t \u0111\u1ed3ng b\u1ed9 m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-c\u01a1-b\u1ea3n-v\u1ec1-ajax-jquery\"><strong>C\u01a1 b\u1ea3n v\u1ec1 AJAX jQuery<\/strong><\/h3>\n\n\n\n<p>C\u1ed1t l\u00f5i c\u1ee7a AJAX trong jQuery xoay quanh h\u00e0m <code>$.ajax()<\/code>, cung c\u1ea5p m\u1ed9t giao di\u1ec7n \u0111\u01a1n gi\u1ea3n v\u00e0 nh\u1ea5t qu\u00e1n \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c y\u00eau c\u1ea7u HTTP b\u1ea5t \u0111\u1ed3ng b\u1ed9. AJAX v\u1edbi jQuery mang l\u1ea1i s\u1ef1 linh ho\u1ea1t v\u00e0 m\u1ea1nh m\u1ebd trong vi\u1ec7c giao ti\u1ebfp gi\u1eefa tr\u00ecnh duy\u1ec7t v\u00e0 m\u00e1y ch\u1ee7, t\u1eeb \u0111\u00f3 gi\u00fap b\u1ea1n x\u00e2y d\u1ef1ng c\u00e1c \u1ee9ng d\u1ee5ng web t\u01b0\u01a1ng t\u00e1c cao, nhanh ch\u00f3ng v\u00e0 m\u01b0\u1ee3t m\u00e0.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-x\u1eed-ly-cac-lo\u1ea1i-request-khac-nhau\"><strong>X\u1eed l\u00fd c\u00e1c lo\u1ea1i request kh\u00e1c nhau<\/strong><\/h3>\n\n\n\n<p>Trong khi v\u00ed d\u1ee5 tr\u01b0\u1edbc s\u1eed d\u1ee5ng ph\u01b0\u01a1ng th\u1ee9c GET, h\u00e0m <code>$.ajax()<\/code> c\u1ee7a jQuery c\u00f2n h\u1ed7 tr\u1ee3 nhi\u1ec1u ph\u01b0\u01a1ng th\u1ee9c HTTP kh\u00e1c, cho ph\u00e9p b\u1ea1n x\u1eed l\u00fd \u0111a d\u1ea1ng c\u00e1c lo\u1ea1i thao t\u00e1c v\u1edbi m\u00e1y ch\u1ee7.&nbsp;<\/p>\n\n\n\n<p>Ch\u1eb3ng h\u1ea1n nh\u01b0 <code>PUT<\/code> v\u00e0 <code>DELETE<\/code> ch\u1ec9 b\u1eb1ng c\u00e1ch ch\u1ec9 \u0111\u1ecbnh ph\u01b0\u01a1ng th\u1ee9c t\u01b0\u01a1ng \u1ee9ng trong thu\u1ed9c t\u00ednh method c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ea5u h\u00ecnh. Vi\u1ec7c linh ho\u1ea1t s\u1eed d\u1ee5ng c\u00e1c lo\u1ea1i y\u00eau c\u1ea7u HTTP s\u1ebd gi\u00fap \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n giao ti\u1ebfp hi\u1ec7u qu\u1ea3 h\u01a1n v\u1edbi c\u00e1c API backend, ph\u1ee5c v\u1ee5 t\u1ed1t cho c\u00e1c thao t\u00e1c th\u00eam, s\u1eeda, x\u00f3a d\u1eef li\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-lam-vi\u1ec7c-v\u1edbi-d\u1eef-li\u1ec7u-json\"><strong>L\u00e0m vi\u1ec7c v\u1edbi d\u1eef li\u1ec7u JSON<\/strong><\/h3>\n\n\n\n<p>Nhi\u1ec1u API web hi\u1ec7n \u0111\u1ea1i tr\u1ea3 v\u1ec1 d\u1eef li\u1ec7u \u1edf \u0111\u1ecbnh d\u1ea1ng JSON (JavaScript Object Notation), m\u1ed9t \u0111\u1ecbnh d\u1ea1ng nh\u1eb9, d\u1ec5 \u0111\u1ecdc v\u00e0 d\u1ec5 ph\u00e2n t\u00edch c\u00fa ph\u00e1p b\u1eb1ng JavaScript. jQuery h\u1ed7 tr\u1ee3 s\u1eb5n vi\u1ec7c x\u1eed l\u00fd d\u1eef li\u1ec7u JSON trong c\u00e1c y\u00eau c\u1ea7u AJAX.<\/p>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t v\u00ed d\u1ee5 v\u1ec1 c\u00e1ch l\u00e0m vi\u1ec7c v\u1edbi d\u1eef li\u1ec7u JSON:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.ajax({\n&nbsp;&nbsp;url: 'https:\/\/api.example.com\/users',\n&nbsp;&nbsp;method: 'GET',\n&nbsp;&nbsp;dataType: 'json',\n&nbsp;&nbsp;success: function(users) {\n&nbsp;&nbsp;&nbsp;&nbsp;\/\/ Ph\u1ea3n h\u1ed3i \u0111\u01b0\u1ee3c t\u1ef1 \u0111\u1ed9ng ph\u00e2n t\u00edch c\u00fa ph\u00e1p d\u01b0\u1edbi d\u1ea1ng JSON\n&nbsp;&nbsp;&nbsp;&nbsp;users.forEach(function(user) {\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;console.log(user.name);\n&nbsp;&nbsp;&nbsp;&nbsp;});\n&nbsp;&nbsp;},\n&nbsp;&nbsp;error: function(xhr, status, error) {\n&nbsp;&nbsp;&nbsp;&nbsp;\/\/ X\u1eed l\u00fd l\u1ed7i khi x\u1ea3y ra\n&nbsp;&nbsp;&nbsp;&nbsp;console.error(error);\n&nbsp;&nbsp;}\n});<\/code><\/pre>\n\n\n\n<p>Trong v\u00ed d\u1ee5 tr\u00ean, s\u1eed d\u1ee5ng thu\u1ed9c t\u00ednh <code>dataType: 'json'<\/code> \u0111\u1ec3 y\u00eau c\u1ea7u jQuery t\u1ef1 \u0111\u1ed9ng ph\u00e2n t\u00edch ph\u1ea3n h\u1ed3i th\u00e0nh d\u1eef li\u1ec7u JSON. Nh\u1edd v\u1eady, h\u00e0m callback success s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch d\u01b0\u1edbi d\u1ea1ng m\u1ea3ng ho\u1eb7c \u0111\u1ed1i t\u01b0\u1ee3ng, t\u00f9y v\u00e0o c\u1ea5u tr\u00fac ph\u1ea3n h\u1ed3i t\u1eeb m\u00e1y ch\u1ee7.<\/p>\n\n\n\n<p>M\u1ed9t c\u00e1ch thay th\u1ebf l\u00e0 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng th\u1ee9c <code>$.getJSON()<\/code> \u0111\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a y\u00eau c\u1ea7u <code>GET<\/code> v\u1edbi d\u1eef li\u1ec7u JSON:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.getJSON('https:\/\/api.example.com\/users', function(users) {\n&nbsp;&nbsp;users.forEach(function(user) {\n&nbsp;&nbsp;&nbsp;&nbsp;console.log(user.name);\n&nbsp;&nbsp;});\n}).fail(function(xhr, status, error) {\n&nbsp;&nbsp;console.error('L\u1ed7i:', error);\n});<\/code><\/pre>\n\n\n\n<p>L\u01b0u \u00fd: N\u1ebfu server tr\u1ea3 v\u1ec1 d\u1eef li\u1ec7u kh\u00f4ng \u0111\u00fang \u0111\u1ecbnh d\u1ea1ng JSON (v\u00ed d\u1ee5: HTML ho\u1eb7c text), y\u00eau c\u1ea7u s\u1ebd th\u1ea5t b\u1ea1i v\u00e0 g\u1ecdi h\u00e0m error. Vi\u1ec7c x\u1eed l\u00fd JSON theo c\u00e1ch n\u00e0y s\u1ebd gi\u00fap b\u1ea1n ti\u1ebft ki\u1ec7m th\u1eddi gian, tr\u00e1nh ph\u1ea3i t\u1ef1 ph\u00e2n t\u00edch c\u00fa ph\u00e1p b\u1eb1ng <code>JSON.parse()<\/code>, \u0111\u1ed3ng th\u1eddi gi\u00fap m\u00e3 tr\u1edf n\u00ean g\u1ecdn g\u00e0ng v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-x\u1eed-ly-ph\u1ea3n-h\u1ed3i-responses\"><strong>X\u1eed l\u00fd ph\u1ea3n h\u1ed3i (responses)<\/strong><\/h3>\n\n\n\n<p>H\u00e0m <code>$.ajax()<\/code> c\u1ee7a jQuery cung c\u1ea5p nhi\u1ec1u c\u00e1ch \u0111\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u ph\u1ea3n h\u1ed3i, t\u00f9y thu\u1ed9c v\u00e0o nhu c\u1ea7u c\u1ee7a b\u1ea1n. Ngo\u00e0i c\u00e1c h\u00e0m callback nh\u01b0 success v\u00e0 error, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c done, fail v\u00e0 always \u0111\u1ec3 qu\u1ea3n l\u00fd ph\u1ea3n h\u1ed3i m\u1ed9t c\u00e1ch linh ho\u1ea1t h\u01a1n.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.ajax({\n&nbsp;&nbsp;url: 'https:\/\/api.example.com\/data',\n&nbsp;&nbsp;method: 'GET'\n})\n&nbsp;&nbsp;.done(function(response) {\n&nbsp;&nbsp;&nbsp;&nbsp;\/\/ X\u1eed l\u00fd ph\u1ea3n h\u1ed3i th\u00e0nh c\u00f4ng\n&nbsp;&nbsp;&nbsp;&nbsp;console.log(response);\n&nbsp;&nbsp;})\n&nbsp;&nbsp;.fail(function(xhr, status, error) {\n&nbsp;&nbsp;&nbsp;&nbsp;\/\/ X\u1eed l\u00fd l\u1ed7i khi x\u1ea3y ra\n&nbsp;&nbsp;&nbsp;&nbsp;console.error(error);\n&nbsp;&nbsp;})\n&nbsp;&nbsp;.always(function() {\n&nbsp;&nbsp;&nbsp;&nbsp;\/\/ \u0110o\u1ea1n m\u00e3 n\u00e0y lu\u00f4n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n, b\u1ea5t k\u1ec3 th\u00e0nh c\u00f4ng hay th\u1ea5t b\u1ea1i\n&nbsp;&nbsp;&nbsp;&nbsp;console.log('Request completed');\n&nbsp;&nbsp;});<\/code><\/pre>\n\n\n\n<p>Ph\u00e2n t\u00edch v\u00ed d\u1ee5 tr\u00ean:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ph\u01b0\u01a1ng th\u1ee9c <code>done<\/code> t\u01b0\u01a1ng t\u1ef1 nh\u01b0 callback success, \u0111\u01b0\u1ee3c g\u1ecdi khi y\u00eau c\u1ea7u AJAX th\u00e0nh c\u00f4ng.<\/li>\n\n\n\n<li>Ph\u01b0\u01a1ng th\u1ee9c <code>fail<\/code> t\u01b0\u01a1ng t\u1ef1 nh\u01b0 callback error, \u0111\u01b0\u1ee3c g\u1ecdi khi c\u00f3 l\u1ed7i x\u1ea3y ra trong qu\u00e1 tr\u00ecnh g\u1eedi y\u00eau c\u1ea7u.<\/li>\n\n\n\n<li>Ph\u01b0\u01a1ng th\u1ee9c <code>always<\/code> \u0111\u01b0\u1ee3c th\u1ef1c thi b\u1ea5t k\u1ec3 y\u00eau c\u1ea7u c\u00f3 th\u00e0nh c\u00f4ng hay th\u1ea5t b\u1ea1i, r\u1ea5t h\u1eefu \u00edch \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c c\u00f4ng vi\u1ec7c d\u1ecdn d\u1eb9p ho\u1eb7c c\u1eadp nh\u1eadt giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng sau khi y\u00eau c\u1ea7u ho\u00e0n t\u1ea5t.<\/li>\n\n\n\n<li>C\u00e1c ph\u01b0\u01a1ng th\u1ee9c n\u00e0y s\u1eed d\u1ee5ng c\u00fa ph\u00e1p Promise, \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 t\u1ed1t trong jQuery 3.x, gi\u00fap m\u00e3 ngu\u1ed3n r\u00f5 r\u00e0ng v\u00e0 d\u1ec5 duy tr\u00ec.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-chu\u1ed7i-ajax-calls\"><strong>Chu\u1ed7i AJAX calls<\/strong><\/h3>\n\n\n\n<p>M\u1ed9t trong nh\u1eefng t\u00ednh n\u0103ng n\u1ed5i b\u1eadt c\u1ee7a AJAX jQuery l\u00e0 kh\u1ea3 n\u0103ng th\u1ef1c hi\u1ec7n AJAX calls theo chu\u1ed7i. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n nhi\u1ec1u y\u00eau c\u1ea7u AJAX, trong \u0111\u00f3 y\u00eau c\u1ea7u ti\u1ebfp theo ch\u1ec9 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n sau khi y\u00eau c\u1ea7u tr\u01b0\u1edbc \u0111\u00f3 ho\u00e0n t\u1ea5t v\u00e0 tr\u1ea3 v\u1ec1 k\u1ebft qu\u1ea3. Vi\u1ec7c s\u1eed d\u1ee5ng chu\u1ed7i AJAX calls \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch khi l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c API c\u1ea7n nhi\u1ec1u b\u01b0\u1edbc \u0111\u1ec3 truy xu\u1ea5t ho\u1eb7c c\u1eadp nh\u1eadt d\u1eef li\u1ec7u.<\/p>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 v\u00ed d\u1ee5 v\u1ec1 c\u00e1ch th\u1ef1c hi\u1ec7n chu\u1ed7i AJAX calls trong jQuery:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.ajax({\n&nbsp;&nbsp;url: 'https:\/\/api.example.com\/users',\n&nbsp;&nbsp;method: 'GET',\n&nbsp;&nbsp;dataType: 'json'\n})\n&nbsp;&nbsp;.done(function(users) {\n&nbsp;&nbsp;&nbsp;&nbsp;\/\/ X\u1eed l\u00fd danh s\u00e1ch ng\u01b0\u1eddi d\u00f9ng\n&nbsp;&nbsp;&nbsp;&nbsp;console.log(users);\n&nbsp;&nbsp;&nbsp;&nbsp;\/\/ Th\u1ef1c hi\u1ec7n ti\u1ebfp m\u1ed9t l\u1eddi g\u1ecdi AJAX \u0111\u1ec3 l\u1ea5y th\u00f4ng tin chi ti\u1ebft c\u1ee7a m\u1ed9t ng\u01b0\u1eddi d\u00f9ng c\u1ee5 th\u1ec3\n&nbsp;&nbsp;&nbsp;&nbsp;var userId = users&#91;0].id;\n&nbsp;&nbsp;&nbsp;&nbsp;return $.ajax({\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;url: `https:\/\/api.example.com\/users\/${userId}`,\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;method: 'GET',\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dataType: 'json'\n&nbsp;&nbsp;&nbsp;&nbsp;});\n&nbsp;&nbsp;})\n&nbsp;&nbsp;.done(function(user) {\n&nbsp;&nbsp;&nbsp;&nbsp;\/\/ X\u1eed l\u00fd th\u00f4ng tin chi ti\u1ebft c\u1ee7a ng\u01b0\u1eddi d\u00f9ng c\u1ee5 th\u1ec3\n&nbsp;&nbsp;&nbsp;&nbsp;console.log(user);\n&nbsp;&nbsp;})\n&nbsp;&nbsp;.fail(function(xhr, status, error) {\n&nbsp;&nbsp;&nbsp;&nbsp;\/\/ X\u1eed l\u00fd l\u1ed7i n\u1ebfu c\u00f3 x\u1ea3y ra trong chu\u1ed7i AJAX calls\n&nbsp;&nbsp;&nbsp;&nbsp;console.error(error);\n&nbsp;&nbsp;});<\/code><\/pre>\n\n\n\n<p>Ph\u00e2n t\u00edch v\u00ed d\u1ee5 tr\u00ean:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0110\u1ea7u ti\u00ean, th\u1ef1c hi\u1ec7n m\u1ed9t y\u00eau c\u1ea7u <code>GET<\/code> \u0111\u1ec3 l\u1ea5y danh s\u00e1ch ng\u01b0\u1eddi d\u00f9ng.&nbsp;<\/li>\n\n\n\n<li>Trong h\u00e0m <code>done<\/code> \u0111\u1ea7u ti\u00ean, x\u1eed l\u00fd danh s\u00e1ch, sau \u0111\u00f3 tr\u1ea3 v\u1ec1 m\u1ed9t AJAX call kh\u00e1c \u0111\u1ec3 l\u1ea5y th\u00f4ng tin chi ti\u1ebft c\u1ee7a m\u1ed9t ng\u01b0\u1eddi d\u00f9ng c\u1ee5 th\u1ec3 d\u1ef1a tr\u00ean ID c\u1ee7a h\u1ecd.<\/li>\n\n\n\n<li>AJAX call th\u1ee9 hai ch\u1ec9 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n sau khi l\u1eddi g\u1ecdi \u0111\u1ea7u ti\u00ean th\u00e0nh c\u00f4ng, v\u00e0 ph\u1ea3n h\u1ed3i c\u1ee7a n\u00f3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd trong h\u00e0m done ti\u1ebfp theo.<\/li>\n<\/ul>\n\n\n\n<p>M\u1ed9t c\u00e1ch hi\u1ec7n \u0111\u1ea1i h\u01a1n l\u00e0 s\u1eed d\u1ee5ng <code>async\/await<\/code> v\u1edbi jQuery (t\u1eeb phi\u00ean b\u1ea3n 3.0):<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>async function fetchUserData() {\n&nbsp;&nbsp;try {\n&nbsp;&nbsp;&nbsp;&nbsp;const users = await $.ajax({\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;url: 'https:\/\/api.example.com\/users',\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;method: 'GET',\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dataType: 'json'\n&nbsp;&nbsp;&nbsp;&nbsp;});\n&nbsp;&nbsp;&nbsp;&nbsp;console.log(users);\n&nbsp;&nbsp;&nbsp;&nbsp;const userId = users&#91;0].id;\n&nbsp;&nbsp;&nbsp;&nbsp;const user = await $.ajax({\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;url: `https:\/\/api.example.com\/users\/${userId}`,\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;method: 'GET',\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dataType: 'json'\n&nbsp;&nbsp;&nbsp;&nbsp;});\n&nbsp;&nbsp;&nbsp;&nbsp;console.log(user);\n&nbsp;&nbsp;} catch (error) {\n&nbsp;&nbsp;&nbsp;&nbsp;console.error('L\u1ed7i trong chu\u1ed7i AJAX:', error);\n&nbsp;&nbsp;}\n}\nfetchUserData();<\/code><\/pre>\n\n\n\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng chu\u1ed7i AJAX calls nh\u01b0 v\u1eady gi\u00fap m\u00e3 ngu\u1ed3n tr\u1edf n\u00ean r\u00f5 r\u00e0ng, d\u1ec5 b\u1ea3o tr\u00ec h\u01a1n, v\u00ec m\u1ed7i y\u00eau c\u1ea7u \u0111\u01b0\u1ee3c x\u1eed l\u00fd ri\u00eang bi\u1ec7t nh\u01b0ng v\u1eabn l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a quy tr\u00ecnh t\u1ed5ng th\u1ec3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-x\u1eed-ly-l\u1ed7i-va-debug\"><strong>X\u1eed l\u00fd l\u1ed7i v\u00e0 debug<\/strong><\/h3>\n\n\n\n<p>D\u00f9 AJAX jQuery gi\u00fap c\u1ea3i thi\u1ec7n tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng, nh\u01b0ng c\u0169ng c\u00f3 th\u1ec3 ph\u00e1t sinh l\u1ed7i kh\u00f3 ki\u1ec3m so\u00e1t n\u1ebfu kh\u00f4ng x\u1eed l\u00fd \u0111\u00fang c\u00e1ch. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec3 x\u1eed l\u00fd v\u00e0 g\u1ee1 l\u1ed7i hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n<p>\u0110\u1ea7u ti\u00ean, b\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng <code>fail()<\/code> ho\u1eb7c <code>error callback<\/code> \u0111\u1ec3 x\u1eed l\u00fd l\u1ed7i. Khi g\u1eedi AJAX, b\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng <code>.fail()<\/code> \u0111\u1ec3 b\u1eaft c\u00e1c l\u1ed7i nh\u01b0 l\u1ed7i m\u1ea1ng, l\u1ed7i m\u00e1y ch\u1ee7 ho\u1eb7c l\u1ed7i x\u00e1c th\u1ef1c.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.ajax({\n&nbsp;&nbsp;url: 'https:\/\/api.example.com\/data',\n&nbsp;&nbsp;method: 'GET'\n})\n.done(function(response) {\n&nbsp;&nbsp;console.log(response); \/\/ X\u1eed l\u00fd khi th\u00e0nh c\u00f4ng\n})\n.fail(function(xhr, status, error) {\n&nbsp;&nbsp;console.error(error); \/\/ Hi\u1ec3n th\u1ecb l\u1ed7i\n&nbsp;&nbsp;console.log('Status:', status);\n&nbsp;&nbsp;console.log('Response:', xhr.responseText);\n});<\/code><\/pre>\n\n\n\n<p>Ho\u1eb7c c\u00e1ch th\u1ee9 hai l\u00e0 b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 Developer Tools c\u1ee7a tr\u00ecnh duy\u1ec7t. C\u00e1c tr\u00ecnh duy\u1ec7t hi\u1ec7n \u0111\u1ea1i \u0111\u1ec1u c\u00f3 tab Network \u0111\u1ec3 b\u1ea1n ki\u1ec3m tra chi ti\u1ebft c\u00e1c request AJAX: header, d\u1eef li\u1ec7u g\u1eedi, nh\u1eadn, m\u00e3 l\u1ed7i,\u2026 gi\u00fap x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n l\u1ed7i nh\u01b0 sai \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u, l\u1ed7i x\u00e1c th\u1ef1c,&#8230;<\/p>\n\n\n\n<p>C\u00e1ch th\u1ee9 ba b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o l\u00e0 thi\u1ebft l\u1eadp x\u1eed l\u00fd l\u1ed7i to\u00e0n c\u1ee5c v\u1edbi <code>$.ajaxSetup()<\/code>. N\u1ebfu \u1ee9ng d\u1ee5ng c\u00f3 nhi\u1ec1u l\u1ec7nh AJAX, b\u1ea1n c\u00f3 th\u1ec3 c\u1ea5u h\u00ecnh x\u1eed l\u00fd l\u1ed7i m\u1ed9t l\u1ea7n cho t\u1ea5t c\u1ea3. Vi\u1ec7c n\u00e0y s\u1ebd gi\u00fap b\u1ea1n \u0111\u1ed3ng b\u1ed9 c\u00e1ch x\u1eed l\u00fd l\u1ed7i tr\u00ean to\u00e0n \u1ee9ng d\u1ee5ng, ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 d\u1ec5 qu\u1ea3n l\u00fd h\u01a1n.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.ajaxSetup({\n&nbsp;&nbsp;error: function(xhr, status, error) {\n&nbsp;&nbsp;&nbsp;&nbsp;console.error('AJAX Error:', error);\n&nbsp;&nbsp;}\n});<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-can-nh\u1eafc-v\u1ec1-tinh-b\u1ea3o-m\u1eadt\"><strong>C\u00e2n nh\u1eafc v\u1ec1 t\u00ednh b\u1ea3o m\u1eadt<\/strong><\/h3>\n\n\n\n<p>Khi l\u00e0m vi\u1ec7c v\u1edbi AJAX jQuery, b\u1ea1n c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 b\u1ea3o m\u1eadt quan tr\u1ecdng \u0111\u1ec3 tr\u00e1nh l\u1ed7 h\u1ed5ng ti\u1ec1m \u1ea9n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>XSS (T\u1ea5n c\u00f4ng ch\u00e8n m\u00e3 \u0111\u1ed9c):<\/strong> X\u1ea3y ra khi d\u1eef li\u1ec7u do ng\u01b0\u1eddi d\u00f9ng nh\u1eadp kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m tra k\u1ef9. H\u00e3y d\u00f9ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c nh\u01b0 <code>text()<\/code> thay v\u00ec <code>html()<\/code> \u0111\u1ec3 tr\u00e1nh ch\u00e8n m\u00e3 \u0111\u1ed9c v\u00e0o trang.<\/li>\n\n\n\n<li><strong>CSRF (Gi\u1ea3 m\u1ea1o y\u00eau c\u1ea7u ng\u01b0\u1eddi d\u00f9ng): <\/strong>Tr\u00ecnh duy\u1ec7t b\u1ecb l\u1ee3i d\u1ee5ng \u0111\u1ec3 g\u1eedi y\u00eau c\u1ea7u tr\u00e1i ph\u00e9p. N\u00ean d\u00f9ng CSRF token trong c\u00e1c y\u00eau c\u1ea7u AJAX v\u00e0 x\u00e1c th\u1ef1c ph\u00eda server.<\/li>\n\n\n\n<li><strong>Ch\u00ednh s\u00e1ch c\u00f9ng ngu\u1ed3n (Same-Origin Policy): <\/strong>AJAX ch\u1ec9 \u0111\u01b0\u1ee3c ph\u00e9p g\u1eedi y\u00eau c\u1ea7u \u0111\u1ebfn c\u00f9ng domain. N\u1ebfu c\u1ea7n g\u1ecdi API t\u1eeb domain kh\u00e1c, b\u1ea1n ph\u1ea3i b\u1eadt CORS \u1edf ph\u00eda server ho\u1eb7c d\u00f9ng JSONP\/proxy.<\/li>\n\n\n\n<li><strong>X\u1eed l\u00fd d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m<\/strong>: Khi truy\u1ec1n th\u00f4ng tin quan tr\u1ecdng nh\u01b0 m\u1eadt kh\u1ea9u, h\u00e3y \u0111\u1ea3m b\u1ea3o s\u1eed d\u1ee5ng HTTPS v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u an to\u00e0n \u1edf ph\u00eda server.<\/li>\n\n\n\n<li><strong>Th\u01b0 vi\u1ec7n b\u00ean th\u1ee9 ba:<\/strong> Lu\u00f4n c\u1eadp nh\u1eadt c\u00e1c th\u01b0 vi\u1ec7n jQuery ho\u1eb7c plugin b\u1ea1n s\u1eed d\u1ee5ng \u0111\u1ec3 tr\u00e1nh c\u00e1c l\u1ed7 h\u1ed5ng t\u1eeb phi\u00ean b\u1ea3n c\u0169.<\/li>\n\n\n\n<li><strong>Ki\u1ec3m tra v\u00e0 l\u1ecdc d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o:<\/strong> Lu\u00f4n x\u00e1c minh v\u00e0 l\u00e0m s\u1ea1ch d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 tr\u00e1nh c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng nh\u01b0 SQL injection hay ch\u00e8n m\u00e3 \u0111\u1ed9c.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-so-sanh-ajax-jquery-va-nh\u1eefng-gi\u1ea3i-phap-thay-th\u1ebf-hi\u1ec7n-d\u1ea1i\"><span class=\"ez-toc-section\" id=\"So_sanh_AJAX_jQuery_va_Nhung_giai_phap_thay_the_hien_dai\"><\/span><strong>So s\u00e1nh AJAX jQuery v\u00e0 Nh\u1eefng gi\u1ea3i ph\u00e1p thay th\u1ebf hi\u1ec7n \u0111\u1ea1i<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>B\u00ean c\u1ea1nh AJAX jQuery th\u00ec v\u1eabn c\u00f3 m\u1ed9t s\u1ed1 gi\u1ea3i ph\u00e1p thay th\u1ebf hi\u1ec7n \u0111\u1ea1i cho c\u00e1c t\u00e1c v\u1ee5 g\u1ecdi API b\u1ea5t \u0111\u1ed3ng b\u1ed9. Fetch API, Axios hay th\u1eadm ch\u00ed l\u00e0 c\u00e1c th\u01b0 vi\u1ec7n reactive nh\u01b0 React Query c\u00f3 th\u1ec3 gi\u00fap qu\u00e1 tr\u00ecnh l\u1eadp tr\u00ecnh web tr\u1edf n\u00ean t\u1ed1i \u01b0u v\u00e0 linh ho\u1ea1t h\u01a1n \u0111\u1ec3 l\u00e0m vi\u1ec7c v\u1edbi d\u1eef li\u1ec7u t\u1eeb server. AJAX jQuery v\u1eabn h\u1eefu \u00edch cho c\u00e1c d\u1ef1 \u00e1n c\u0169 ho\u1eb7c khi c\u1ea7n h\u1ed7 tr\u1ee3 c\u00e1c tr\u00ecnh duy\u1ec7t c\u0169 kh\u00f4ng t\u01b0\u01a1ng th\u00edch t\u1ed1t v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi.<\/p>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 gi\u1ea3i \u0111\u00e1p thay th\u1ebf hi\u1ec7n \u0111\u1ea1i b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o nh\u01b0 sau.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>C\u00f4ng c\u1ee5<\/strong><\/td><td><strong>H\u1ed7 tr\u1ee3 th\u1eddi gian th\u1ef1c<\/strong><\/td><td><strong>C\u00fa ph\u00e1p<\/strong><\/td><td><strong>H\u1ed7 tr\u1ee3 tr\u00ecnh duy\u1ec7t<\/strong><\/td><td><strong>H\u1ed7 tr\u1ee3 2 chi\u1ec1u (Bi-directional)<\/strong><\/td><\/tr><tr><td>AJAX jQuery<\/td><td>Kh\u00f4ng (th\u1eddi gian th\u1ef1c c\u1ea7n WebSocket ho\u1eb7c gi\u1ea3i ph\u00e1p kh\u00e1c)<\/td><td>D\u1ec5 hi\u1ec3u nh\u1edd th\u01b0 vi\u1ec7n jQuery h\u1ed7 tr\u1ee3 s\u1eb5n.<\/td><td>H\u1ed7 tr\u1ee3 t\u1ed1t tr\u00ean h\u1ea7u h\u1ebft c\u00e1c tr\u00ecnh duy\u1ec7t.<\/td><td>Kh\u00f4ng h\u1ed7 tr\u1ee3.<\/td><\/tr><tr><td>Fetch API<\/td><td>Kh\u00f4ng<\/td><td>\u0110\u01a1n gi\u1ea3n, d\u1ec5 s\u1eed d\u1ee5ng.<\/td><td>\u0110\u01b0\u1ee3c h\u1ed7 tr\u1ee3 r\u1ed9ng r\u00e3i tr\u00ean c\u00e1c tr\u00ecnh duy\u1ec7t hi\u1ec7n \u0111\u1ea1i.<\/td><td>Kh\u00f4ng h\u1ed7 tr\u1ee3<\/td><\/tr><tr><td>Axios<\/td><td>Kh\u00f4ng (th\u1eddi gian th\u1ef1c c\u1ea7n WebSocket ho\u1eb7c SSE)<\/td><td>R\u1ea5t \u0111\u01a1n gi\u1ea3n, th\u00e2n thi\u1ec7n v\u1edbi l\u1eadp tr\u00ecnh vi\u00ean.<\/td><td>H\u1ed7 tr\u1ee3 t\u1ed1t tr\u00ean t\u1ea5t c\u1ea3 tr\u00ecnh duy\u1ec7t hi\u1ec7n \u0111\u1ea1i. (y\u00eau c\u1ea7u t\u1ea3i th\u01b0 vi\u1ec7n Axios)<\/td><td>Kh\u00f4ng h\u1ed7 tr\u1ee3<\/td><\/tr><tr><td>GraphQL<\/td><td>Ch\u1ec9 h\u1ed7 tr\u1ee3 th\u00f4ng qua c\u01a1 ch\u1ebf subcriptions. (y\u00eau c\u1ea7u WebSocket \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng th\u1eddi gian th\u1ef1c)<\/td><td>\u0110\u01a1n gi\u1ea3n v\u00e0 r\u00f5 r\u00e0ng.<\/td><td>H\u1ed7 tr\u1ee3 t\u1ed1t tr\u00ean h\u1ea7u h\u1ebft c\u00e1c tr\u00ecnh duy\u1ec7t.<\/td><td>C\u00f3 kh\u1ea3 n\u0103ng giao ti\u1ebfp hai chi\u1ec1u th\u00f4ng qua subscriptions.<\/td><\/tr><tr><td>React Query<\/td><td>Kh\u00f4ng (th\u1eddi gian th\u1ef1c c\u1ea7n t\u00edch h\u1ee3p WebSocket)<\/td><td>R\u1ea5t \u0111\u01a1n gi\u1ea3n, nhi\u1ec1u ti\u1ec7n \u00edch nh\u01b0 cache, t\u1ef1 \u0111\u1ed9ng refetch, qu\u1ea3n l\u00fd tr\u1ea1ng th\u00e1i.<\/td><td>Ho\u1ea1t \u0111\u1ed9ng t\u1ed1t tr\u00ean tr\u00ecnh duy\u1ec7t hi\u1ec7n \u0111\u1ea1i (d\u1ef1a tr\u00ean n\u1ec1n t\u1ea3ng fetch ho\u1eb7c Axios)<\/td><td>Kh\u00f4ng h\u1ed7 tr\u1ee3 hai chi\u1ec1u m\u1ed9t c\u00e1ch nguy\u00ean b\u1ea3n, nh\u01b0ng c\u00f3 th\u1ec3 t\u00edch h\u1ee3p n\u1ebfu c\u1ea7n.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-fetch-api-h\u1ee3p-ly-hoa-vi\u1ec7c-truy-xu\u1ea5t-d\u1eef-li\u1ec7u\"><strong>Fetch API &#8211; H\u1ee3p l\u00fd h\u00f3a vi\u1ec7c truy xu\u1ea5t d\u1eef li\u1ec7u<\/strong><\/h3>\n\n\n\n<p>Fetch API l\u00e0 giao di\u1ec7n JavaScript hi\u1ec7n \u0111\u1ea1i thay th\u1ebf XMLHttpRequest, \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p s\u1eb5n trong tr\u00ecnh duy\u1ec7t hi\u1ec7n nay. Fetch cung c\u1ea5p m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn tr\u1ef1c ti\u1ebfp v\u00e0 d\u1ef1a tr\u00ean Promise so v\u1edbi AJAX.&nbsp;<\/p>\n\n\n\n<p>V\u1edbi c\u00fa ph\u00e1p th\u00e2n thi\u1ec7n h\u01a1n, h\u1ed7 tr\u1ee3 Promise v\u00e0 <code>async\/await<\/code>, Fetch gi\u00fap vi\u1ebft m\u00e3 b\u1ea5t \u0111\u1ed3ng b\u1ed9 tr\u1edf n\u00ean r\u00f5 r\u00e0ng, d\u1ec5 b\u1ea3o tr\u00ec. Tuy nhi\u00ean, n\u00f3 kh\u00f4ng t\u1ef1 \u0111\u1ed9ng x\u1eed l\u00fd JSON ho\u1eb7c l\u1ed7i HTTP nh\u01b0 Axios, n\u00ean c\u1ea7n l\u1eadp tr\u00ecnh vi\u00ean t\u1ef1 b\u1ed5 sung c\u00e1c x\u1eed l\u00fd.<\/p>\n\n\n\n<p>Fetch API l\u00e0 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p khi b\u1ea1n kh\u00f4ng mu\u1ed1n ph\u1ee5 thu\u1ed9c v\u00e0o th\u01b0 vi\u1ec7n b\u00ean ngo\u00e0i v\u00e0 c\u1ea7n m\u1ed9t gi\u1ea3i ph\u00e1p nh\u1eb9 nh\u00e0ng cho c\u00e1c project nh\u1ecf. \u0110\u00e2y c\u0169ng l\u00e0 c\u00f4ng c\u1ee5 l\u00fd t\u01b0\u1edfng \u0111\u1ec3 hi\u1ec3u r\u00f5 c\u00e1ch JavaScript ho\u1ea1t \u0111\u1ed9ng v\u1edbi HTTP.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>fetch('https:\/\/api.example.com\/data')\n&nbsp;&nbsp;.then(response =&gt; response.json())\n&nbsp;&nbsp;.then(data =&gt; console.log(data))\n&nbsp;&nbsp;.catch(error =&gt; console.error('Error:', error));<\/code><\/pre>\n\n\n\n<p>V\u00ed d\u1ee5 tr\u00ean l\u00e0 c\u00e1ch s\u1eed d\u1ee5ng Fetch API trong JavaScript \u0111\u1ec3 l\u1ea5y d\u1eef li\u1ec7u t\u1eeb m\u1ed9t API. C\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>fetch('https:\/\/api.example.com\/data')<\/code>: \u0110\u00e2y l\u00e0 l\u1ec7nh g\u1ecdi \u0111\u1ebfn API t\u1ea1i \u0111\u1ecba ch\u1ec9 https:\/\/api.example.com\/data. H\u00e0m fetch s\u1ebd g\u1eedi m\u1ed9t y\u00eau c\u1ea7u HTTP <code>GET<\/code> \u0111\u1ebfn URL n\u00e0y \u0111\u1ec3 l\u1ea5y d\u1eef li\u1ec7u.<\/li>\n\n\n\n<li><strong><code>then(response =&gt; response.json())<\/code>: <\/strong>Sau khi nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i t\u1eeb server, ph\u01b0\u01a1ng th\u1ee9c then \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u1eed l\u00fd k\u1ebft qu\u1ea3. Tham s\u1ed1 response ch\u1ee9a th\u00f4ng tin v\u1ec1 ph\u1ea3n h\u1ed3i t\u1eeb server.<\/li>\n\n\n\n<li><strong><code>.then(data =&gt; console.log(data))<\/code>:<\/strong> Data l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng JavaScript m\u00e0 b\u1ea1n \u0111\u00e3 nh\u1eadn \u0111\u01b0\u1ee3c t\u1eeb ph\u01b0\u01a1ng th\u1ee9c <code>response.json()<\/code>.&nbsp;<\/li>\n\n\n\n<li><strong><code>console.log(data)<\/code>: <\/strong>In ra d\u1eef li\u1ec7u \u0111\u00f3 tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n (console) c\u1ee7a tr\u00ecnh duy\u1ec7t, cho ph\u00e9p b\u1ea1n xem n\u1ed9i dung m\u00e0 b\u1ea1n \u0111\u00e3 nh\u1eadn t\u1eeb API.<\/li>\n\n\n\n<li><strong><code>.catch(error =&gt; console.error('Error:', error))<\/code><\/strong>:N\u1ebfu c\u00f3 b\u1ea5t k\u1ef3 l\u1ed7i n\u00e0o x\u1ea3y ra trong qu\u00e1 tr\u00ecnh l\u1ea5y d\u1eef li\u1ec7u, ph\u1ea7n catch s\u1ebd \u0111\u01b0\u1ee3c g\u1ecdi.<\/li>\n\n\n\n<li><strong><code>console.error('Error:', error)<\/code>: <\/strong>In ra th\u00f4ng b\u00e1o l\u1ed7i tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n, gi\u00fap b\u1ea1n x\u00e1c \u0111\u1ecbnh v\u1ea5n \u0111\u1ec1.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-axios-yeu-c\u1ea7u-http-d\u01b0\u1ee3c-d\u01a1n-gi\u1ea3n-hoa\"><strong>Axios &#8211; Y\u00eau c\u1ea7u HTTP \u0111\u01b0\u1ee3c \u0111\u01a1n gi\u1ea3n h\u00f3a<\/strong><\/h3>\n\n\n\n<p><a href=\"https:\/\/axios-http.com\/docs\/intro\" target=\"_blank\" rel=\"noreferrer noopener\">Axios<\/a> l\u00e0 m\u1ed9t th\u01b0 vi\u1ec7n HTTP request ph\u1ed5 bi\u1ebfn trong h\u1ec7 sinh th\u00e1i JavaScript. Axios h\u1ed7 tr\u1ee3 Promise v\u00e0 t\u00edch h\u1ee3p r\u1ea5t t\u1ed1t v\u1edbi <code>async\/await<\/code>. Axios y\u00eau c\u1ea7u t\u1ea3i th\u01b0 vi\u1ec7n, l\u00e0m t\u0103ng k\u00edch th\u01b0\u1edbc t\u1ea3i trang so v\u1edbi Fetch API, nh\u01b0ng b\u00f9 l\u1ea1i cung c\u1ea5p nhi\u1ec1u t\u00ednh n\u0103ng ti\u1ec7n l\u1ee3i.&nbsp;<\/p>\n\n\n\n<p>\u0110i\u1ec3m m\u1ea1nh c\u1ee7a Axios l\u00e0 kh\u1ea3 n\u0103ng t\u1ef1 \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u JSON, c\u1ea5u h\u00ecnh headers, x\u1eed l\u00fd l\u1ed7i r\u00f5 r\u00e0ng, timeout v\u00e0 kh\u1ea3 n\u0103ng h\u1ee7y request. Ngo\u00e0i ra, Axios c\u00f2n ho\u1ea1t \u0111\u1ed9ng t\u1ed1t c\u1ea3 ph\u00eda client l\u1eabn server (Node.js).<\/p>\n\n\n\n<p>B\u00ean c\u1ea1nh \u0111\u00f3, Axios t\u1ed1i \u01b0u t\u1ed1t h\u01a1n Fetch API trong th\u1ef1c t\u1ebf s\u1ea3n xu\u1ea5t nh\u1edd c\u00fa ph\u00e1p g\u1ecdn, kh\u1ea3 n\u0103ng x\u1eed l\u00fd l\u1ed7i \u0111\u1ea7y \u0111\u1ee7 v\u00e0 d\u1ec5 t\u00f9y bi\u1ebfn. Axios s\u1ebd l\u00e0 l\u1ef1a ch\u1ecdn ho\u00e0n h\u1ea3o trong nhi\u1ec1u d\u1ef1 \u00e1n t\u1eeb v\u1eeba \u0111\u1ebfn l\u1edbn.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>axios.get('https:\/\/api.example.com\/data')\n&nbsp;&nbsp;.then(res =&gt; console.log(res.data))\n&nbsp;&nbsp;.catch(err =&gt; console.error(err));<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em>Xem th\u00eam: <strong><a href=\"https:\/\/itviec.com\/blog\/front-end-framework-library\/\" target=\"_blank\" rel=\"noreferrer noopener\">Top 10 Th\u01b0 vi\u1ec7n v\u00e0 Framework front end d\u00f9ng nhi\u1ec1u nh\u1ea5t hi\u1ec7n nay<\/a><\/strong><\/em><\/p>\n<\/blockquote>\n\n\n\n<p>V\u00ed d\u1ee5 s\u1eed d\u1ee5ng <code>async\/await<\/code>:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>async function fetchData() {\n&nbsp;&nbsp;try {\n&nbsp;&nbsp;&nbsp;&nbsp;const res = await axios.get('https:\/\/jsonplaceholder.typicode.com\/posts');\n&nbsp;&nbsp;&nbsp;&nbsp;console.log(res.data);\n&nbsp;&nbsp;} catch (err) {\n&nbsp;&nbsp;&nbsp;&nbsp;console.error('Error:', err);\n&nbsp;&nbsp;}\n}\nfetchData();<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-graphql-truy-xu\u1ea5t-d\u1eef-li\u1ec7u-hi\u1ec7u-qu\u1ea3\"><strong>GraphQL &#8211; Truy xu\u1ea5t d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3<\/strong><\/h3>\n\n\n\n<p><a href=\"https:\/\/graphql.org\/\" target=\"_blank\" rel=\"noreferrer noopener\">GraphQL<\/a> l\u00e0 ng\u00f4n ng\u1eef truy v\u1ea5n cho API cho ph\u00e9p client y\u00eau c\u1ea7u ch\u00ednh x\u00e1c d\u1eef li\u1ec7u h\u1ecd c\u1ea7n, trong m\u1ed9t request duy nh\u1ea5t. Kh\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c API REST truy\u1ec1n th\u1ed1ng, th\u01b0\u1eddng l\u1ea5y d\u1eef li\u1ec7u qu\u00e1 m\u1ee9c, GraphQL cho ph\u00e9p l\u1ea5y d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3, gi\u1ea3m t\u1ea3i v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t.<\/p>\n\n\n\n<p>N\u1ebfu b\u1ea1n c\u1ea7n m\u1ed9t API linh ho\u1ea1t, t\u1ed1i \u01b0u b\u0103ng th\u00f4ng v\u00e0 d\u1ec5 m\u1edf r\u1ed9ng trong t\u01b0\u01a1ng lai, GraphQL l\u00e0 l\u1ef1a ch\u1ecdn n\u00ean c\u00e2n nh\u1eafc. \u0110\u1eb7c bi\u1ec7t h\u1eefu \u00edch v\u1edbi Frontend hi\u1ec7n \u0111\u1ea1i c\u1ea7n custom d\u1eef li\u1ec7u hi\u1ec3n th\u1ecb theo nhi\u1ec1u c\u00e1ch.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gi\u1ea3m t\u00ecnh tr\u1ea1ng t\u1ea3i qu\u00e1 m\u1ee9c v\u00e0 t\u1ea3i d\u01b0\u1edbi m\u1ee9c.<\/li>\n\n\n\n<li>Schema \u0111\u01b0\u1ee3c g\u00f5 m\u1ea1nh.<\/li>\n\n\n\n<li>Single endpoint cho t\u1ea5t c\u1ea3 c\u00e1c y\u00eau c\u1ea7u.<\/li>\n\n\n\n<li>Ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng di \u0111\u1ed9ng ho\u1eb7c \u1ee9ng d\u1ee5ng bandwidth-sensitive.<\/li>\n<\/ul>\n\n\n\n<p>GraphQL s\u1ebd ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng ph\u1ee9c t\u1ea1p, h\u1ec7 th\u1ed1ng c\u00f3 quan h\u1ec7 d\u1eef li\u1ec7u nhi\u1ec1u t\u1ea7ng, SPA ho\u1eb7c mobile app c\u1ea7n t\u1ed1i \u01b0u t\u1ed1c \u0111\u1ed9 t\u1ea3i d\u1eef li\u1ec7u.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import { gql, useQuery } from '@apollo\/client';\nconst GET_USERS = gql`\n&nbsp;&nbsp;query {\n&nbsp;&nbsp;&nbsp;&nbsp;users {\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;id\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;name\n&nbsp;&nbsp;&nbsp;&nbsp;}\n&nbsp;&nbsp;}\n`;\nconst { loading, error, data } = useQuery(GET_USERS);<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-react-query\"><strong>React Query<\/strong><\/h3>\n\n\n\n<p>React Query l\u00e0 th\u01b0 vi\u1ec7n gi\u00fap qu\u1ea3n l\u00fd v\u00e0 g\u1ecdi <a href=\"https:\/\/itviec.com\/blog\/api-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">API<\/a> trong React theo h\u01b0\u1edbng hi\u1ec7n \u0111\u1ea1i v\u00e0 t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t. Kh\u00f4ng ch\u1ec9 l\u00e0 &#8220;g\u1eedi request v\u00e0 nh\u1eadn d\u1eef li\u1ec7u&#8221;, th\u01b0 vi\u1ec7n n\u00e0y h\u1ed7 tr\u1ee3 cache, refetch t\u1ef1 \u0111\u1ed9ng, \u0111\u1ed3ng b\u1ed9 d\u1eef li\u1ec7u, stale data, pagination v\u00e0 c\u1ea3 mutation (thay \u0111\u1ed5i d\u1eef li\u1ec7u).<\/p>\n\n\n\n<p>Thay v\u00ec \u201cc\u1eadp nh\u1eadt li\u00ean t\u1ee5c\u201d nh\u01b0 WebSocket, React Query t\u1ef1 \u0111\u1ed9ng refetch d\u1eef li\u1ec7u d\u1ef1a tr\u00ean c\u1ea5u h\u00ecnh. Ngo\u00e0i ra, React Query c\u00f3 c\u1ed9ng \u0111\u1ed3ng l\u1edbn v\u00e0 ph\u00e1t tri\u1ec3n r\u1ea5t nhanh.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5 s\u1eed d\u1ee5ng React Query:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import { useQuery } from '@tanstack\/react-query';\nfunction Posts() {\n&nbsp;&nbsp;const { data, isLoading, error } = useQuery({\n&nbsp;&nbsp;&nbsp;&nbsp;queryKey: &#91;'posts'],\n&nbsp;&nbsp;&nbsp;&nbsp;queryFn: () =&gt; fetch('https:\/\/jsonplaceholder.typicode.com\/posts').then(res =&gt; res.json())\n&nbsp;&nbsp;});\n&nbsp;&nbsp;if (isLoading) return &lt;p&gt;Loading...&lt;\/p&gt;;\n&nbsp;&nbsp;if (error) return &lt;p&gt;Error: {error.message}&lt;\/p&gt;;\n&nbsp;&nbsp;return (\n&nbsp;&nbsp;&nbsp;&nbsp;&lt;ul&gt;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{data.map(post =&gt; (\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;li key={post.id}&gt;{post.title}&lt;\/li&gt;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;))}\n&nbsp;&nbsp;&nbsp;&nbsp;&lt;\/ul&gt;\n&nbsp;&nbsp;);\n}<\/code><\/pre>\n\n\n\n<p>Thay v\u00ec t\u1ef1 vi\u1ebft logic g\u1ecdi API, x\u1eed l\u00fd loading, error v\u00e0 caching, React Query gi\u00fap b\u1ea1n ti\u1ebft ki\u1ec7m th\u1eddi gian v\u1edbi c\u1ea5u tr\u00fac chu\u1ea9n h\u00f3a. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u1eadp trung v\u00e0o ph\u00e1t tri\u1ec3n t\u00ednh n\u0103ng thay v\u00ec qu\u1ea3n l\u00fd state ph\u1ee9c t\u1ea1p.<\/p>\n\n\n\n<p>React Query s\u1ebd ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng React hi\u1ec7n \u0111\u1ea1i, SPA, nh\u1eefng n\u01a1i y\u00eau c\u1ea7u hi\u1ec7u n\u0103ng cao v\u00e0 c\u1eadp nh\u1eadt d\u1eef li\u1ec7u li\u00ean t\u1ee5c.<\/p>\n\n\n\n<p>V\u1eady l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00e1p thay th\u1ebf ph\u00f9 h\u1ee3p? B\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o qua b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/strong><\/td><td><strong>Gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p nh\u1ea5t<\/strong><\/td><\/tr><tr><td>G\u1eedi y\u00eau c\u1ea7u b\u1ea5t \u0111\u1ed3ng b\u1ed9 \u0111\u01a1n gi\u1ea3n.<\/td><td>Fetch API (d\u1ef1 \u00e1n nh\u1ecf, kh\u00f4ng c\u1ea7n x\u1eed l\u00fd l\u1ed7i ph\u1ee9c t\u1ea1p)<\/td><\/tr><tr><td>C\u1ea7n x\u1eed l\u00fd l\u1ed7i m\u1ea1nh m\u1ebd v\u00e0 r\u00f5 r\u00e0ng.<\/td><td>Axios<\/td><\/tr><tr><td>Truy v\u1ea5n d\u1eef li\u1ec7u ch\u00ednh x\u00e1c, c\u00f3 c\u1ea5u tr\u00fac.<\/td><td>GraphQL<\/td><\/tr><tr><td>D\u1ef1 \u00e1n c\u0169 s\u1eed d\u1ee5ng jQuery.<\/td><td>AJAX jQuery (ho\u1eb7c t\u00edch h\u1ee3p nhanh v\u00e0o c\u00e1c d\u1ef1 \u00e1n kh\u00f4ng d\u00f9ng framework hi\u1ec7n \u0111\u1ea1i)<\/td><\/tr><tr><td>Qu\u1ea3n l\u00fd truy v\u1ea5n, cache v\u00e0 \u0111\u1ed3ng b\u1ed9 h\u00f3a d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3.<\/td><td>React Query<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-nh\u1eefng-l\u1ed7i-th\u01b0\u1eddng-g\u1eb7p-khi-s\u1eed-d\u1ee5ng-ajax-jquery-nbsp\"><span class=\"ez-toc-section\" id=\"Nhung_loi_thuong_gap_khi_su_dung_AJAX_jQuery\"><\/span><strong>Nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi s\u1eed d\u1ee5ng AJAX jQuery&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>D\u00f9 AJAX jQuery gi\u00fap l\u1eadp tr\u00ecnh b\u1ea5t \u0111\u1ed3ng b\u1ed9 tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n, v\u1eabn c\u00f3 th\u1ec3 x\u1ea3y ra c\u00e1c l\u1ed7i th\u01b0\u1eddng g\u1eb7p li\u00ean quan \u0111\u1ebfn c\u1ea5u h\u00ecnh sai, \u0111\u01b0\u1eddng d\u1eabn kh\u00f4ng ch\u00ednh x\u00e1c, ho\u1eb7c m\u00f4i tr\u01b0\u1eddng kh\u00f4ng ph\u00f9 h\u1ee3p.<\/p>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 l\u1ed7i th\u01b0\u1eddng g\u1eb7p trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng AJAX jQuery. S\u1eed d\u1ee5ng Developer Tools c\u1ee7a tr\u00ecnh duy\u1ec7t (tab Network) s\u1ebd gi\u00fap x\u00e1c \u0111\u1ecbnh v\u00e0 kh\u1eafc ph\u1ee5c l\u1ed7i nhanh ch\u00f3ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-sai-url-ho\u1eb7c-d\u01b0\u1eddng-d\u1eabn-t\u01b0\u01a1ng-d\u1ed1i-khong-chinh-xac\"><strong>Sai URL ho\u1eb7c \u0111\u01b0\u1eddng d\u1eabn t\u01b0\u01a1ng \u0111\u1ed1i kh\u00f4ng ch\u00ednh x\u00e1c<\/strong><\/h3>\n\n\n\n<p>M\u1ed9t l\u1ed7i th\u01b0\u1eddng g\u1eb7p l\u00e0 s\u1eed d\u1ee5ng sai \u0111\u01b0\u1eddng d\u1eabn API ho\u1eb7c file x\u1eed l\u00fd request. \u0110i\u1ec1u n\u00e0y khi\u1ebfn request kh\u00f4ng th\u1ec3 g\u1eedi \u0111\u1ebfn \u0111\u00fang n\u01a1i v\u00e0 tr\u1ea3 v\u1ec1 l\u1ed7i 404. L\u1ed7i n\u00e0y c\u0169ng c\u00f3 th\u1ec3 x\u1ea3y ra do ch\u00ednh s\u00e1ch CORS n\u1ebfu API n\u1eb1m tr\u00ean domain kh\u00e1c ho\u1eb7c do \u0111\u01b0\u1eddng d\u1eabn t\u01b0\u01a1ng \u0111\u1ed1i khi ch\u1ea1y file HTML c\u1ee5c b\u1ed9 (<code>file:\/\/<\/code>).<\/p>\n\n\n\n<p>C\u00e1ch kh\u1eafc ph\u1ee5c:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Lu\u00f4n ki\u1ec3m tra l\u1ea1i \u0111\u01b0\u1eddng d\u1eabn API, \u0111\u1eb7c bi\u1ec7t khi s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng dev\/staging\/production.<\/li>\n\n\n\n<li>S\u1eed d\u1ee5ng Developer Tools (tab Network) \u0111\u1ec3 ki\u1ec3m tra URL v\u00e0 m\u00e3 tr\u1ea1ng th\u00e1i HTTP.<\/li>\n\n\n\n<li>\u0110\u1ea3m b\u1ea3o file HTML \u0111\u01b0\u1ee3c ch\u1ea1y tr\u00ean server (nh\u01b0 localhost) \u0111\u1ec3 tr\u00e1nh l\u1ed7i \u0111\u01b0\u1eddng d\u1eabn t\u01b0\u01a1ng \u0111\u1ed1i.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-quen-ho\u1eb7c-sai-c\u1ea5u-hinh-datatype-va-contenttype\"><strong>Qu\u00ean ho\u1eb7c sai c\u1ea5u h\u00ecnh dataType v\u00e0 contentType<\/strong><\/h3>\n\n\n\n<p>N\u1ebfu server tr\u1ea3 v\u1ec1 JSON nh\u01b0ng b\u1ea1n kh\u00f4ng ch\u1ec9 \u0111\u1ecbnh r\u00f5 dataType: &#8216;json&#8217;, c\u00f3 th\u1ec3 d\u1eef li\u1ec7u kh\u00f4ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u0111\u00fang. N\u1ebfu kh\u00f4ng ch\u1ec9 \u0111\u1ecbnh dataType, jQuery s\u1ebd \u0111o\u00e1n \u0111\u1ecbnh d\u1ea1ng d\u1ef1a tr\u00ean header Content-Type c\u1ee7a ph\u1ea3n h\u1ed3i, nh\u01b0ng \u0111i\u1ec1u n\u00e0y kh\u00f4ng lu\u00f4n ch\u00ednh x\u00e1c. T\u01b0\u01a1ng t\u1ef1, n\u1ebfu g\u1eedi d\u1eef li\u1ec7u nh\u01b0ng kh\u00f4ng \u0111\u1eb7t contentType \u0111\u00fang, server c\u00f3 th\u1ec3 kh\u00f4ng hi\u1ec3u request.<\/p>\n\n\n\n<p>C\u00e1ch kh\u1eafc ph\u1ee5c: X\u00e1c \u0111\u1ecbnh r\u00f5 ki\u1ec3u d\u1eef li\u1ec7u g\u1eedi \u0111i v\u00e0 nh\u1eadn v\u1ec1 v\u00e0 d\u00f9ng \u0111\u00fang c\u1eb7p.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>contentType: 'application\/json',\ndataType: 'json'<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-quen-json-stringify\"><strong>Qu\u00ean JSON.stringify()<\/strong><\/h3>\n\n\n\n<p>Khi g\u1eedi object JSON \u0111\u1ebfn server b\u1eb1ng POST, nhi\u1ec1u ng\u01b0\u1eddi qu\u00ean chuy\u1ec3n d\u1eef li\u1ec7u v\u1ec1 chu\u1ed7i JSON, d\u1eabn \u0111\u1ebfn server kh\u00f4ng hi\u1ec3u n\u1ed9i dung.<\/p>\n\n\n\n<p>C\u00e1ch kh\u1eafc ph\u1ee5c l\u00e0 b\u1ea1n c\u1ea7n d\u00f9ng JSON.stringify(data) khi c\u1ea7n thi\u1ebft:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>data: JSON.stringify({name: \"John\", age: 30})<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-m\u1ed9t-s\u1ed1-ma-code-sai\"><strong>M\u1ed9t s\u1ed1 m\u00e3 (code) sai<\/strong><\/h3>\n\n\n\n<p>Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, tr\u00ecnh x\u1eed l\u00fd l\u1ed7i ch\u1ec9 ghi l\u1ea1i m\u00e3 tr\u1ea1ng th\u00e1i HTTP (xhr.status) m\u00e0 kh\u00f4ng cung c\u1ea5p th\u00f4ng tin chi ti\u1ebft v\u1ec1 l\u1ed7i. B\u1eb1ng c\u00e1ch ghi l\u1ea1i tham s\u1ed1 l\u1ed7i, c\u00f3 th\u1ec3 thu th\u1eadp th\u00eam th\u00f4ng tin b\u1ed5 sung, t\u1eeb \u0111\u00f3 h\u1ed7 tr\u1ee3 qu\u00e1 tr\u00ecnh ch\u1ea9n \u0111o\u00e1n v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n\n\n\n<p>Code sai:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.ajax({\n&nbsp;&nbsp;&nbsp;&nbsp;url: 'https:\/\/api.example.com\/data',\n&nbsp;&nbsp;&nbsp;&nbsp;method: 'GET',\n&nbsp;&nbsp;&nbsp;&nbsp;success: function(response) {\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/ Process response data\n&nbsp;&nbsp;&nbsp;&nbsp;},\n&nbsp;&nbsp;&nbsp;&nbsp;error: function(xhr, status, error) {\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;console.log(xhr.status); \/\/ 404\n&nbsp;&nbsp;&nbsp;&nbsp;}\n});<\/code><\/pre>\n\n\n\n<p>Code \u0111\u00fang sau khi \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c l\u1ed7i:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.ajax({\n&nbsp;&nbsp;&nbsp;&nbsp;url: 'https:\/\/api.example.com\/data',\n&nbsp;&nbsp;&nbsp;&nbsp;method: 'GET',\n&nbsp;&nbsp;&nbsp;&nbsp;success: function(response) {\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/ Process response data\n&nbsp;&nbsp;&nbsp;&nbsp;},\n&nbsp;&nbsp;&nbsp;&nbsp;error: function(xhr, status, error) {\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;console.log(xhr.status); \/\/ Corrected to log HTTP status code\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;console.log(error); \/\/ Log error message\n&nbsp;&nbsp;&nbsp;&nbsp;}\n});<\/code><\/pre>\n\n\n\n<p>M\u1ed9t tr\u01b0\u1eddng h\u1ee3p kh\u00e1c, l\u1ed7i x\u1ea3y ra do JSON kh\u00f4ng h\u1ee3p l\u1ec7 \u0111\u01b0\u1ee3c m\u00e1y ch\u1ee7 tr\u1ea3 v\u1ec1, g\u00e2y ra l\u1ed7i c\u00fa ph\u00e1p trong qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch c\u00fa ph\u00e1p. B\u1eb1ng c\u00e1ch ghi l\u1ea1i xhr.responseText v\u00e0 truy xu\u1ea5t v\u0103n b\u1ea3n ph\u1ea3n h\u1ed3i th\u1ef1c t\u1ebf, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng x\u00e1c \u0111\u1ecbnh v\u00e0 kh\u1eafc ph\u1ee5c c\u00e1c l\u1ed7i li\u00ean quan \u0111\u1ebfn ph\u00e2n t\u00edch c\u00fa ph\u00e1p.<\/p>\n\n\n\n<p>Code ban \u0111\u1ea7u:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.ajax({\n&nbsp;&nbsp;&nbsp;&nbsp;url: '&lt;https:\/\/api.example.com\/data&gt;',\n&nbsp;&nbsp;&nbsp;&nbsp;method: 'POST',\n&nbsp;&nbsp;&nbsp;&nbsp;data: JSON.stringify({}),\n&nbsp;&nbsp;&nbsp;&nbsp;contentType: 'application\/json',\n&nbsp;&nbsp;&nbsp;&nbsp;success: function(response) {\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/ Process response data\n&nbsp;&nbsp;&nbsp;&nbsp;},\n&nbsp;&nbsp;&nbsp;&nbsp;error: function(xhr, status, error) {\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;console.log(error); \/\/ SyntaxError: Unexpected token &lt; in JSON at position 0\n&nbsp;&nbsp;&nbsp;&nbsp;}\n});<\/code><\/pre>\n\n\n\n<p>Code sau khi \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$.ajax({\n&nbsp;&nbsp;&nbsp;&nbsp;url: '&lt;https:\/\/api.example.com\/data&gt;',\n&nbsp;&nbsp;&nbsp;&nbsp;method: 'POST',\n&nbsp;&nbsp;&nbsp;&nbsp;data: JSON.stringify({}),\n&nbsp;&nbsp;&nbsp;&nbsp;contentType: 'application\/json',\n&nbsp;&nbsp;&nbsp;&nbsp;success: function(response) {\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/ Process response data\n&nbsp;&nbsp;&nbsp;&nbsp;},\n&nbsp;&nbsp;&nbsp;&nbsp;error: function(xhr, status, error) {\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;console.log(xhr.responseText); \/\/ Log response text for debugging\n&nbsp;&nbsp;&nbsp;&nbsp;}\n});<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-cac-cau-h\u1ecfi-th\u01b0\u1eddng-g\u1eb7p-v\u1ec1-ajax-jquery\"><span class=\"ez-toc-section\" id=\"Cac_cau_hoi_thuong_gap_ve_AJAX_jQuery\"><\/span><strong>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 AJAX jQuery<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jquery-co-con-phu-h\u1ee3p-trong-th\u1eddi-d\u1ea1i-hi\u1ec7n-nay-khong\"><strong>jQuery c\u00f3 c\u00f2n ph\u00f9 h\u1ee3p trong th\u1eddi \u0111\u1ea1i hi\u1ec7n nay kh\u00f4ng?<\/strong><\/h3>\n\n\n\n<p>D\u00f9 c\u00e1c framework hi\u1ec7n \u0111\u1ea1i nh\u01b0 <a href=\"https:\/\/itviec.com\/blog\/reactjs-la-gi\/\">React<\/a>, <a href=\"https:\/\/itviec.com\/blog\/vuejs-la-gi\/\">Vue<\/a> hay <a href=\"https:\/\/itviec.com\/blog\/angular-la-gi\/\">Angular<\/a> \u0111ang r\u1ea5t ph\u1ed5 bi\u1ebfn, jQuery v\u1eabn c\u00f2n ph\u00f9 h\u1ee3p trong nhi\u1ec1u d\u1ef1 \u00e1n nh\u1eb9, \u0111\u01a1n gi\u1ea3n ho\u1eb7c nh\u1eefng h\u1ec7 th\u1ed1ng c\u0169 c\u1ea7n duy tr\u00ec. \u0110\u1eb7c bi\u1ec7t, v\u1edbi c\u00e1c t\u00e1c v\u1ee5 nh\u01b0 thao t\u00e1c DOM, hi\u1ec7u \u1ee9ng v\u00e0 s\u1eed d\u1ee5ng AJAX \u0111\u01a1n gi\u1ea3n, jQuery v\u1eabn l\u00e0 l\u1ef1a ch\u1ecdn gi\u00fap ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 c\u00f4ng s\u1ee9c.<\/p>\n\n\n\n<p>M\u1ed9t s\u1ed1 l\u00fd do jQuery v\u1eabn c\u00f2n ph\u1ed5 bi\u1ebfn v\u00e0 ph\u00f9 h\u1ee3p trong l\u1eadp tr\u00ecnh web hi\u1ec7n \u0111\u1ea1i c\u00f3 th\u1ec3 k\u1ec3 \u0111\u1ebfn nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>jQuery \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 h\u1ecdc, ph\u00f9 h\u1ee3p v\u1edbi ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u d\u1ec5 hi\u1ec3u v\u00e0 nhanh ch\u00f3ng b\u1eaft \u0111\u1ea7u s\u1eed d\u1ee5ng.<\/li>\n\n\n\n<li>T\u0103ng t\u1ed1c qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n cho c\u00e1c t\u00e1c v\u1ee5 c\u01a1 b\u1ea3n nh\u01b0 x\u1eed l\u00fd s\u1ef1 ki\u1ec7n, ho\u1ea1t \u1ea3nh v\u00e0 thao t\u00e1c DOM m\u00e0 kh\u00f4ng c\u1ea7n nhi\u1ec1u m\u00e3.<\/li>\n\n\n\n<li>Nhi\u1ec1u trang web c\u0169 h\u01a1n v\u1eabn s\u1eed d\u1ee5ng jQuery v\u00e0 v\u1eabn h\u1eefu \u00edch \u0111\u1ec3 duy tr\u00ec ho\u1eb7c c\u1eadp nh\u1eadt c\u00e1c trang web n\u00e0y.<\/li>\n\n\n\n<li>jQuery gi\u00fap \u0111\u1ea3m b\u1ea3o r\u1eb1ng trang web c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng tr\u01a1n tru tr\u00ean c\u00e1c tr\u00ecnh duy\u1ec7t web kh\u00e1c nhau, ti\u1ebft ki\u1ec7m th\u1eddi gian th\u1eed nghi\u1ec7m v\u00e0 g\u1ee1 l\u1ed7i.<\/li>\n\n\n\n<li>\u0110\u1ea3m b\u1ea3o t\u01b0\u01a1ng th\u00edch tr\u00ecnh duy\u1ec7t, nh\u01b0ng c\u00f3 th\u1ec3 kh\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng SPA ph\u1ee9c t\u1ea1p ho\u1eb7c khi c\u1ea7n t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t do k\u00edch th\u01b0\u1edbc th\u01b0 vi\u1ec7n.<\/li>\n\n\n\n<li>N\u1ebfu b\u1eaft \u0111\u1ea7u d\u1ef1 \u00e1n m\u1edbi, n\u00ean c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng Fetch API ho\u1eb7c c\u00e1c framework hi\u1ec7n \u0111\u1ea1i \u0111\u1ec3 t\u1eadn d\u1ee5ng t\u00ednh n\u0103ng v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed1t h\u01a1n.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-s\u1ef1-khac-bi\u1ec7t-gi\u1eefa-ajax-get-va-post-la-gi\"><strong>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa $.ajax(), $.get() v\u00e0 $.post() l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>$.ajax()<\/code>:<\/strong> Ph\u01b0\u01a1ng th\u1ee9c to\u00e0n di\u1ec7n nh\u1ea5t, cho ph\u00e9p b\u1ea1n t\u00f9y ch\u1ec9nh g\u1ea7n nh\u01b0 m\u1ecdi kh\u00eda c\u1ea1nh c\u1ee7a request: method, headers, timeout, x\u1eed l\u00fd l\u1ed7i,&#8230;<\/li>\n\n\n\n<li><strong><code>$.get()<\/code><\/strong>: M\u1ed9t phi\u00ean b\u1ea3n r\u00fat g\u1ecdn c\u1ee7a <code>$.ajax()<\/code> chuy\u00ean d\u00f9ng \u0111\u1ec3 g\u1eedi request GET nhanh ch\u00f3ng. H\u1ed7 tr\u1ee3 x\u1eed l\u00fd l\u1ed7i qua .fail() ho\u1eb7c tham s\u1ed1 error.<\/li>\n\n\n\n<li><strong><code>$.post()<\/code><\/strong>: T\u01b0\u01a1ng t\u1ef1 <code>get()<\/code>, nh\u01b0ng d\u00e0nh cho c\u00e1c request POST. C\u0169ng h\u1ed7 tr\u1ee3 x\u1eed l\u00fd l\u1ed7i t\u01b0\u01a1ng t\u1ef1.<\/li>\n<\/ul>\n\n\n\n<p>N\u1ebfu b\u1ea1n c\u1ea7n s\u1ef1 linh ho\u1ea1t, h\u00e3y d\u00f9ng <code>$.ajax()<\/code>. N\u1ebfu ch\u1ec9 c\u1ea7n g\u1eedi nh\u1eadn d\u1eef li\u1ec7u \u0111\u01a1n gi\u1ea3n, <code>$.get()<\/code> ho\u1eb7c <code>$.post()<\/code> l\u00e0 \u0111\u1ee7.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-s\u1ef1-khac-nhau-gi\u1eefa-ajax-va-jquery-la-gi\"><strong>S\u1ef1 kh\u00e1c nhau gi\u1eefa AJAX v\u00e0 jQuery l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n<p>V\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, AJAX l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ho\u1eb7c k\u1ef9 thu\u1eadt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 m\u00e0 kh\u00f4ng c\u1ea7n l\u00e0m m\u1edbi ho\u1eb7c t\u1ea3i l\u1ea1i trang web trong khi jQuery l\u00e0 m\u1ed9t th\u01b0 vi\u1ec7n JavaScript gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a AJAX v\u00e0 nhi\u1ec1u t\u00e1c v\u1ee5 kh\u00e1c. N\u00f3 gi\u00fap t\u1ea1o ra c\u00e1c trang web c\u00f3 \u0111\u1ed9 ph\u1ea3n h\u1ed3i v\u00e0 t\u01b0\u01a1ng t\u00e1c t\u1ed1t h\u01a1n.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em>Xem th\u00eam: <strong><a href=\"https:\/\/itviec.com\/blog\/framework-la-gi-top-framework-pho-bien-nhat\/\" target=\"_blank\" rel=\"noreferrer noopener\">Framework l\u00e0 g\u00ec? Top 15+ framework web, mobile ph\u1ed5 bi\u1ebfn<\/a><\/strong><\/em><\/p>\n<\/blockquote>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng t\u1ed5ng h\u1ee3p m\u1ed9t s\u1ed1 \u0111i\u1ec3m kh\u00e1c bi\u1ec7t gi\u1eefa AJAX v\u00e0 jQuery nh\u01b0 sau:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Y\u1ebfu t\u1ed1<\/strong><\/td><td><strong>AJAX<\/strong><\/td><td><strong>jQuery<\/strong><\/td><\/tr><tr><td>Ph\u1ee5 thu\u1ed9c<\/td><td>JavaScript thu\u1ea7n.<\/td><td>Th\u01b0 vi\u1ec7n JavaScript.<\/td><\/tr><tr><td>\u0110\u1ed9 d\u00e0i m\u00e3<\/td><td>Vi\u1ebft nhi\u1ec1u m\u00e3 h\u01a1n.<\/td><td>C\u1ea7n \u00edt m\u00e3 h\u01a1n.<\/td><\/tr><tr><td>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch<\/td><td>Cho ph\u00e9p l\u1eadp tr\u00ecnh vi\u00ean t\u1ef1 x\u1eed l\u00fd kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch gi\u1eefa c\u00e1c tr\u00ecnh duy\u1ec7t.<\/td><td>Tr\u1eebu t\u01b0\u1ee3ng h\u00f3a c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n gi\u1eefa c\u00e1c tr\u00ecnh duy\u1ec7t.<\/td><\/tr><tr><td>DOM<\/td><td>Kh\u00f4ng h\u1ed7 tr\u1ee3.<\/td><td>Kh\u1ea3 n\u0103ng thao t\u00e1c DOM m\u1ea1nh m\u1ebd<\/td><\/tr><tr><td>X\u1eed l\u00fd l\u1ed7i<\/td><td>X\u1eed l\u00fd l\u1ed7i th\u1ee7 c\u00f4ng.<\/td><td>Cung c\u1ea5p c\u01a1 ch\u1ebf x\u1eed l\u00fd l\u1ed7i t\u00edch h\u1ee3p s\u1eb5n.<\/td><\/tr><tr><td>M\u1ee9c \u0111\u1ed9 ph\u1ee9c t\u1ea1p<\/td><td>C\u1ea7n c\u00f3 ki\u1ebfn th\u1ee9c v\u1ec1 JavaScript.<\/td><td>R\u1ea5t tr\u1ef1c quan v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi m\u1edbi h\u01a1n so v\u1edbi AJAX.<\/td><\/tr><tr><td>Plugin &amp; C\u1ed9ng \u0111\u1ed3ng<\/td><td>\u00cdt \u0111\u01b0\u1ee3c c\u1ed9ng \u0111\u1ed3ng h\u1ed7 tr\u1ee3 h\u01a1n so v\u1edbi jQuery.<\/td><td>C\u00f3 nhi\u1ec1u plugin v\u00e0 t\u00e0i nguy\u00ean, c\u1ed9ng \u0111\u1ed3ng l\u1edbn m\u1ea1nh.<\/td><\/tr><tr><td>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/td><td>D\u1ec5 d\u00e0ng m\u1edf r\u1ed9ng v\u1edbi c\u00e1c th\u01b0 vi\u1ec7n JavaScript kh\u00e1c.<\/td><td>C\u00f3 th\u1ec3 m\u1edf r\u1ed9ng v\u1edbi c\u00e1c plugin jQuery b\u1ed5 sung.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-m\u1ee5c-dich-chinh-c\u1ee7a-vi\u1ec7c-s\u1eed-d\u1ee5ng-ajax-v\u1edbi-jquery-la-gi\"><strong>M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng AJAX v\u1edbi jQuery l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n<p>V\u1edbi AJAX jQuery, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng y\u00eau c\u1ea7u v\u0103n b\u1ea3n, XML, HTML ho\u1eb7c JSON t\u1eeb m\u00e1y ch\u1ee7 v\u1edbi s\u1ef1 h\u1ed7 tr\u1ee3 t\u1eeb HTTP Post v\u00e0 HTTP Get. Ngo\u00e0i ra, m\u1ee5c \u0111\u00edch kh\u00e1c c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng AJAX v\u1edbi jQuery c\u00f3 th\u1ec3 bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Y\u00eau c\u1ea7u kh\u00f4ng \u0111\u1ed3ng b\u1ed9.<\/li>\n\n\n\n<li>C\u1eadp nh\u1eadt d\u1eef li\u1ec7u \u0111\u1ecbnh k\u1ef3 (polling), kh\u00f4ng ph\u1ea3i th\u1eddi gian th\u1ef1c nh\u01b0 WebSocket.<\/li>\n\n\n\n<li>N\u00e2ng cao tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng.<\/li>\n\n\n\n<li>Gi\u1ea3m thi\u1ec3u vi\u1ec7c s\u1eed d\u1ee5ng bandwidth.<\/li>\n\n\n\n<li>X\u00e1c th\u1ef1c v\u00e0 g\u1eedi d\u1eef li\u1ec7u.<\/li>\n\n\n\n<li>N\u00e2ng cao hi\u1ec7u su\u1ea5t.<\/li>\n\n\n\n<li>G\u1eedi bi\u1ec3u m\u1eabu ho\u1eb7c x\u00e1c th\u1ef1c d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng.<\/li>\n\n\n\n<li>C\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t b\u1eb1ng c\u00e1ch gi\u1ea3m t\u1ea3i server v\u00e0 ch\u1ec9 c\u1eadp nh\u1eadt m\u1ed9t ph\u1ea7n trang web.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-co-th\u1ec3-s\u1eed-d\u1ee5ng-ajax-ma-khong-c\u1ea7n-jquery-khong\"><strong>C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng AJAX m\u00e0 kh\u00f4ng c\u1ea7n jQuery kh\u00f4ng?<\/strong><\/h3>\n\n\n\n<p><strong>C\u00e2u tr\u1ea3 l\u1eddi l\u00e0 C\u00f3. <\/strong>AJAX l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a JavaScript, n\u00ean b\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng XMLHttpRequest ho\u1eb7c API hi\u1ec7n \u0111\u1ea1i nh\u01b0 <code>fetch()<\/code> \u0111\u1ec3 thay th\u1ebf jQuery. M\u1ed9t s\u1ed1 b\u01b0\u1edbc ch\u00ednh b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o khi s\u1eed d\u1ee5ng AJAX kh\u00f4ng c\u1ea7n jQuery:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ph\u00e1t tri\u1ec3n \u0110\u1ed1i t\u01b0\u1ee3ng XMLHttpRequest.<\/li>\n\n\n\n<li>Thi\u1ebft l\u1eadp y\u00eau c\u1ea7u.<\/li>\n\n\n\n<li>Qu\u1ea3n l\u00fd ph\u1ea3n h\u1ed3i.<\/li>\n\n\n\n<li>G\u1eedi y\u00eau c\u1ea7u.<\/li>\n<\/ul>\n\n\n\n<p>Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng jQuery s\u1ebd gi\u00fap vi\u1ebft m\u00e3 ng\u1eafn g\u1ecdn h\u01a1n v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c d\u1ef1 \u00e1n kh\u00f4ng c\u1ea7n framework ph\u1ee9c t\u1ea1p.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-nguyen-nhan-ph\u1ed5-bi\u1ebfn-gay-ra-l\u1ed7i-ajax-trong-jquery-la-gi\"><strong>Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y ra l\u1ed7i AJAX trong jQuery l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n<p>L\u1ed7i AJAX c\u00f3 th\u1ec3 xu\u1ea5t ph\u00e1t t\u1eeb nhi\u1ec1u y\u1ebfu t\u1ed1, bao g\u1ed3m s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i m\u1ea1ng, l\u1ed7i ph\u00eda m\u00e1y ch\u1ee7, \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u kh\u00f4ng h\u1ee3p l\u1ec7 v\u00e0 c\u1ea5u h\u00ecnh y\u00eau c\u1ea7u kh\u00f4ng ch\u00ednh x\u00e1c.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-t\u1ed5ng-k\u1ebft-v\u1ec1-ajax-jquery-nbsp\"><span class=\"ez-toc-section\" id=\"Tong_ket_ve_AJAX_jQuery\"><\/span><strong>T\u1ed5ng k\u1ebft v\u1ec1 AJAX jQuery&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>AJAX jQuery<\/strong> kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt l\u1eadp tr\u00ecnh, m\u00e0 c\u00f2n gi\u00fap t\u1ed1i \u01b0u tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t c\u1ee7a website. Qua b\u00e0i vi\u1ebft t\u1eeb ITviec, hy v\u1ecdng b\u1ea1n \u0111\u00e3 n\u1eafm \u0111\u01b0\u1ee3c c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c nh\u01b0 $.ajax(), $.get() v\u00e0 $.post() m\u1ed9t c\u00e1ch th\u00e0nh th\u1ea1o \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c \u1ee9ng d\u1ee5ng web linh ho\u1ea1t v\u00e0 hi\u1ec7n \u0111\u1ea1i h\u01a1n nh\u00e9.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em>Xem th\u00eam: <strong><a href=\"https:\/\/itviec.com\/blog\/front-end-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Front end l\u00e0 g\u00ec? H\u01b0\u1edbng ti\u1ebfp c\u1eadn cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u<\/a><\/strong><\/em><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>AJAX jQuery cho ph\u00e9p c\u1eadp nh\u1eadt t\u1eebng ph\u1ea7n c\u1ee7a trang web, t\u1ea3i d\u1eef li\u1ec7u t\u1eeb m\u00e1y ch\u1ee7 v\u00e0 g\u1eedi d\u1eef li\u1ec7u \u0111\u1ebfn m\u00e1y ch\u1ee7 trong n\u1ec1n, t\u1ea5t c\u1ea3 \u0111\u1ec1u di\u1ec5n ra m\u00e0 kh\u00f4ng l\u00e0m gi\u00e1n \u0111o\u1ea1n tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng. V\u1eady c\u00e1ch s\u1eed d\u1ee5ng AJAX trong jQuery nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 hi\u1ec7u qu\u1ea3? C\u00e1c ph\u01b0\u01a1ng [&hellip;]<\/p>\n","protected":false},"author":207,"featured_media":88732,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_gspb_post_css":"","footnotes":""},"categories":[109],"tags":[],"class_list":["post-88726","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chuyen-mon-it"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>AJAX jQuery l\u00e0 g\u00ec: H\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng chi ti\u1ebft cho ng\u01b0\u1eddi m\u1edbi - ITviec Blog<\/title>\n<meta name=\"description\" content=\"C\u00e1ch s\u1eed d\u1ee5ng AJAX jQuery c\u00f9ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c ph\u1ed5 bi\u1ebfn $.ajax(), $.get(), $.post(). 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