{"id":85078,"date":"2025-03-28T09:15:27","date_gmt":"2025-03-28T02:15:27","guid":{"rendered":"https:\/\/itviecblog.uptech.vn\/?p=85078"},"modified":"2025-06-17T15:28:23","modified_gmt":"2025-06-17T08:28:23","slug":"comment-trong-html","status":"publish","type":"post","link":"https:\/\/itviec.com\/blog\/comment-trong-html\/","title":{"rendered":"Comment trong HTML nh\u01b0 th\u1ebf n\u00e0o? C\u00e1ch s\u1eed d\u1ee5ng chi ti\u1ebft t\u1eeb A-Z"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 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\/comment-trong-html\/#Comment_trong_HTML_la_gi\" >Comment trong HTML l\u00e0 g\u00ec?<\/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\/comment-trong-html\/#Chi_tiet_cach_chen_comment_trong_HTML\" >Chi ti\u1ebft c\u00e1ch ch\u00e8n comment trong HTML\u00a0<\/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\/comment-trong-html\/#Ung_dung_cua_comment_trong_HTML\" >\u1ee8ng d\u1ee5ng c\u1ee7a comment trong HTML\u00a0<\/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\/comment-trong-html\/#Cau_hoi_thuong_gap_ve_comment_trong_HTML\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 comment trong HTML<\/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\/comment-trong-html\/#Tong_ket\" >T\u1ed5ng k\u1ebft<\/a><\/li><\/ul><\/nav><\/div>\n<p><strong><em>Comment trong HTML \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u00eam ghi ch\u00fa ho\u1eb7c gi\u1ea3i th\u00edch v\u00e0o \u0111o\u1ea1n m\u00e3 HTML m\u00e0 kh\u00f4ng hi\u1ec3n th\u1ecb tr\u1ef1c ti\u1ebfp tr\u00ean tr\u00ecnh duy\u1ec7t. Vi\u1ec7c s\u1eed d\u1ee5ng comment m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd s\u1ebd gi\u00fap m\u00e3 ngu\u1ed3n d\u1ec5 hi\u1ec3u, d\u1ec5 b\u1ea3o tr\u00ec v\u00e0 n\u00e2ng cao hi\u1ec7u su\u1ea5t l\u00e0m vi\u1ec7c.\u00a0<\/em><\/strong><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u1ecdc b\u00e0i vi\u1ebft sau \u0111\u00e2y \u0111\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p chi ti\u1ebft h\u01a1n v\u1ec1:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ed5ng quan v\u1ec1 comment trong HTML<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e1ch s\u1eed d\u1ee5ng comment trong HTML<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u1ee8ng d\u1ee5ng c\u1ee7a comment trong HTML<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Comment_trong_HTML_la_gi\"><\/span><b>Comment trong HTML l\u00e0 g\u00ec?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Comment trong HTML l\u00e0 \u0111o\u1ea1n m\u00e3 gi\u00fap b\u1ea1n th\u00eam ghi ch\u00fa v\u00e0o t\u1ec7p HTML m\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch tr\u00ecnh duy\u1ec7t hi\u1ec3n th\u1ecb trang web. Comment (b\u00ecnh lu\u1eadn) th\u01b0\u1eddng \u0111\u01b0\u1ee3c b\u1eaft \u0111\u1ea7u b\u1eb1ng chu\u1ed7i &lt;!&#8211; v\u00e0 k\u1ebft th\u00fac b\u1eb1ng chu\u1ed7i &#8211;&gt; v\u1edbi ph\u1ea7n n\u1ed9i dung v\u0103n b\u1ea3n ch\u00e8n \u1edf gi\u1eefa.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5 v\u1ec1 c\u00e1ch b\u00ecnh lu\u1eadn trong HTML nh\u01b0 sau:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;!-- \u0110\u00e2y l\u00e0 n\u1ed9i dung comment v\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb tr\u00ean web --&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;p&gt;N\u1ed9i dung \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb tr\u00ean web&lt;\/p&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;!-- B\u00ecnh lu\u1eadn b\u00ean d\u01b0\u1edbi v\u00f4 hi\u1ec7u h\u00f3a --&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;!--<\/span>\n\n<span style=\"font-weight: 400;\">&lt;p&gt;N\u1ed9i dung n\u00e0y s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb&lt;\/p&gt;<\/span>\n<span style=\"font-weight: 400;\">--&gt;<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">Tr\u00ecnh duy\u1ec7t s\u1ebd b\u1ecf qua c\u00e1c b\u00ecnh lu\u1eadn khi hi\u1ec3n th\u1ecb m\u00e3. Ngh\u0129a l\u00e0, ch\u00fang kh\u00f4ng hi\u1ec3n th\u1ecb tr\u00ean trang, ch\u1ec9 hi\u1ec3n th\u1ecb trong m\u00e3. Comment HTML l\u00e0 c\u00e1ch \u0111\u1ec3 b\u1ea1n vi\u1ebft c\u00e1c ghi ch\u00fa h\u1eefu \u00edch v\u1ec1 m\u00e3 c\u1ee7a m\u00ecnh.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Comment c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean m\u1ed9t d\u00f2ng ho\u1eb7c tr\u1ea3i d\u00e0i tr\u00ean nhi\u1ec1u d\u00f2ng. Ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf nh\u1eefng v\u1ecb tr\u00ed nh\u01b0 sau:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sau Doctype<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tr\u01b0\u1edbc v\u00e0 sau ph\u1ea7n t\u1eed &lt;html&gt;<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">N\u1ed9i dung c\u1ee7a h\u1ea7u h\u1ebft c\u00e1c ph\u1ea7n t\u1eed ngo\u1ea1i tr\u1eeb: &lt;script&gt;, &lt;style&gt;, &lt;title&gt;, &lt;textarea&gt;, v\u00ec c\u00e1c ph\u1ea7n t\u1eed n\u00e0y di\u1ec5n gi\u1ea3i n\u1ed9i dung c\u1ee7a ch\u00fang d\u01b0\u1edbi d\u1ea1ng v\u0103n b\u1ea3n th\u00f4.<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Chi_tiet_cach_chen_comment_trong_HTML\"><\/span><b>Chi ti\u1ebft c\u00e1ch ch\u00e8n comment trong HTML\u00a0<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">C\u00f3 hai c\u00e1ch ch\u00ednh \u0111\u1ec3 b\u00ecnh lu\u1eadn trong HTML l\u00e0 comment tr\u00ean m\u1ed9t d\u00f2ng (single-line) v\u00e0 comment tr\u00ean nhi\u1ec1u d\u00f2ng (multi-line comments). C\u1ea3 hai \u0111\u1ec1u s\u1eed d\u1ee5ng c\u00fa ph\u00e1p c\u01a1 b\u1ea3n gi\u1ed1ng nhau nh\u01b0ng kh\u00e1c nhau v\u1ec1 c\u00e1ch tri\u1ec3n khai.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Comment<\/b><\/td>\n<td><b>C\u00fa ph\u00e1p<\/b><\/td>\n<td><b>V\u00ed d\u1ee5<\/b><\/td>\n<td><b>\u1ee8ng d\u1ee5ng<\/b><\/td>\n<\/tr>\n<tr>\n<td><strong>Comment tr\u00ean m\u1ed9t d\u00f2ng<\/strong><\/td>\n<td style=\"text-align: left;\"><span style=\"font-weight: 400;\">B\u00ecnh lu\u1eadn m\u1ed9t d\u00f2ng \u0111\u01b0\u1ee3c \u0111\u1eb7t b\u00ean trong th\u1ebb ( &lt;!&#8211; comment &#8211;&gt; )<\/span><\/td>\n<td style=\"text-align: left;\"><span style=\"font-weight: 400;\">&lt;!&#8211; B\u00ecnh lu\u1eadn tr\u00ean m\u1ed9t d\u00f2ng &#8211;&gt;<\/span><\/td>\n<td>\n<ul>\n<li style=\"text-align: left;\"><span style=\"font-weight: 400;\">Gi\u1ea3i th\u00edch m\u1ed9t d\u00f2ng m\u00e3 c\u1ee5 th\u1ec3<\/span><\/li>\n<li style=\"text-align: left;\"><span style=\"font-weight: 400;\">Ghi ch\u00fa nhanh khi l\u1eadp tr\u00ecnh<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td><strong>Comment tr\u00ean nhi\u1ec1u d\u00f2ng<\/strong><\/td>\n<td>\n<p style=\"text-align: left;\"><span style=\"font-weight: 400;\">Tu\u00e2n theo c\u00fa ph\u00e1p c\u1ee7a b\u00ecnh lu\u1eadn m\u1ed9t d\u00f2ng b\u1eb1ng c\u00e1ch th\u00eam nhi\u1ec1u d\u00f2ng v\u00e0o b\u00ecnh lu\u1eadn.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-weight: 400;\">&lt;!&#8211; Comment<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-weight: 400;\">Nhi\u1ec1u<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-weight: 400;\">D\u00f2ng &#8211;&gt;<\/span><\/p>\n<\/td>\n<td>\n<p style=\"text-align: left;\"><span style=\"font-weight: 400;\">&lt;!&#8211;<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-weight: 400;\">B\u00ecnh lu\u1eadn<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-weight: 400;\">k\u00e9o d\u00e0i<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-weight: 400;\">tr\u00ean nhi\u1ec1u<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-weight: 400;\">d\u00f2ng<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-weight: 400;\">&#8211;&gt;<\/span><\/p>\n<\/td>\n<td>\n<ul>\n<li style=\"text-align: left;\"><span style=\"font-weight: 400;\">Ghi ch\u00fa chi ti\u1ebft v\u1ec1 m\u1ed9t ph\u1ea7n m\u00e3 l\u1edbn.<\/span><\/li>\n<li style=\"text-align: left;\"><span style=\"font-weight: 400;\">T\u1ea1m th\u1eddi v\u00f4 hi\u1ec7u h\u00f3a m\u1ed9t \u0111o\u1ea1n HTML m\u00e0 kh\u00f4ng c\u1ea7n x\u00f3a<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><b>Comment m\u1ed9t d\u00f2ng (Single-line comment)<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Comment m\u1ed9t d\u00f2ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi b\u1ea1n mu\u1ed1n ghi ch\u00fa ho\u1eb7c gi\u1ea3i th\u00edch m\u1ed9t ph\u1ea7n m\u00e3 ng\u1eafn g\u1ecdn trong HTML.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">C\u00fa ph\u00e1p:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;!-- \u0110\u00e2y l\u00e0 m\u1ed9t comment m\u1ed9t d\u00f2ng --&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;p&gt;\u0110\u00e2y l\u00e0 m\u1ed9t \u0111o\u1ea1n v\u0103n.&lt;\/p&gt;<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5 c\u1ee5 th\u1ec3:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;html&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;body&gt;<\/span>\n\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;!--\u0110\u00e2y l\u00e0 th\u1ebb heading--&gt;<\/span>\n<span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0&lt;h1&gt;ITviec&lt;\/h1&gt;<\/span>\n\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;!--\u0110\u00e2y l\u00e0 comment tr\u00ean 1 d\u00f2ng--&gt;<\/span>\n<span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0&lt;h2&gt;\u0110\u00e2y l\u00e0 &lt;!--\u0111\u01b0\u1ee3c \u0111\u01b0a ra cho--&gt; b\u00ecnh lu\u1eadn m\u1ed9t d\u00f2ng&lt;\/h2&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;\/body&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;\/html&gt;<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">\u1ede v\u00ed d\u1ee5 tr\u00ean, c\u00f3 th\u1ec3 th\u1ea5y:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u0110o\u1ea1n m\u00e3 s\u1eed d\u1ee5ng c\u00e1c ch\u00fa th\u00edch HTML (&lt;!\u2013 comment \u2013&gt;) \u0111\u1ec3 th\u00eam ghi ch\u00fa v\u00e0 ch\u00fang s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb tr\u00ean trang web.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e1c th\u1ebb &lt;h1&gt; v\u00e0 &lt;h2&gt; hi\u1ec3n th\u1ecb ti\u00eau \u0111\u1ec1, trong khi c\u00e1c ch\u00fa th\u00edch n\u1ed9i tuy\u1ebfn trong &lt;h2&gt; kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn v\u0103n b\u1ea3n hi\u1ec3n th\u1ecb ngo\u1ea1i tr\u1eeb ph\u1ea7n v\u0103n b\u1ea3n trong comment s\u1ebd b\u1ecb lo\u1ea1i b\u1ecf. N\u1ed9i dung hi\u1ec3n th\u1ecb s\u1ebd l\u00e0 &#8220;\u0110\u00e2y l\u00e0 b\u00ecnh lu\u1eadn m\u1ed9t d\u00f2ng&#8221; (kh\u00f4ng bao g\u1ed3m &#8220;\u0111\u01b0\u1ee3c \u0111\u01b0a ra cho&#8221;).<\/span><\/li>\n<\/ul>\n<h3><b>Comment tr\u00ean nhi\u1ec1u d\u00f2ng (Multi-line comment)<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Khi c\u1ea7n ghi ch\u00fa m\u1ed9t \u0111o\u1ea1n m\u00e3 d\u00e0i ho\u1eb7c t\u1ea1m th\u1eddi v\u00f4 hi\u1ec7u h\u00f3a m\u1ed9t ph\u1ea7n l\u1edbn c\u1ee7a trang HTML, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng comment nhi\u1ec1u d\u00f2ng.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">C\u00fa ph\u00e1p:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;!--\u00a0<\/span>\n\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u0110\u00e2y l\u00e0 m\u1ed9t comment nhi\u1ec1u d\u00f2ng<\/span>\n<span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0N\u00f3 c\u00f3 th\u1ec3 k\u00e9o d\u00e0i tr\u00ean nhi\u1ec1u d\u00f2ng m\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u00e3 HTML<\/span>\n\n<span style=\"font-weight: 400;\">--&gt;<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;html&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;body&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;!-- \u0110\u00e2y l\u00e0<\/span>\n<span style=\"font-weight: 400;\">th\u1ebb ti\u00eau \u0111\u1ec1 --&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;h1&gt;ITviec&lt;\/h1&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;!-- \u0110\u00e2y l\u00e0<\/span>\n<span style=\"font-weight: 400;\">b\u00ecnh lu\u1eadn nhi\u1ec1u d\u00f2ng --&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;h2&gt;\u0110\u00e2y l\u00e0 b\u00ecnh lu\u1eadn nhi\u1ec1u d\u00f2ng&lt;\/h2&gt;\n<\/span>\n<span style=\"font-weight: 400;\">&lt;!-- &lt;button style=\"font-family: Sans-serif;\"&gt;<\/span>\n<span style=\"font-weight: 400;\">Click Me<\/span>\n<span style=\"font-weight: 400;\">&lt;\/button&gt; --&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;\/body&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;\/html&gt;<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">\u1ede v\u00ed d\u1ee5 tr\u00ean, c\u00f3 th\u1ec3 th\u1ea5y:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u0110o\u1ea1n m\u00e3 bao g\u1ed3m c\u00e1c ch\u00fa th\u00edch HTML (&lt;!\u2013 comment \u2013&gt;) kh\u00f4ng \u0111\u01b0\u1ee3c tr\u00ecnh duy\u1ec7t hi\u1ec3n th\u1ecb nh\u01b0ng \u0111\u00f3ng vai tr\u00f2 l\u00e0 ghi ch\u00fa cho l\u1eadp tr\u00ecnh vi\u00ean.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e1c th\u1ebb &lt;h1&gt; v\u00e0 &lt;h2&gt; \u0111\u1ecbnh ngh\u0129a ti\u00eau \u0111\u1ec1, v\u1edbi c\u00e1c ch\u00fa th\u00edch gi\u1ea3i th\u00edch m\u1ee5c \u0111\u00edch c\u1ee7a ch\u00fang. Ph\u1ea7n t\u1eed &lt;button&gt; \u0111\u01b0\u1ee3c ch\u00fa th\u00edch kh\u00f4ng \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb tr\u00ean trang v\u00ec n\u00f3 \u0111\u00e3 b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a b\u1eb1ng comment.<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Ung_dung_cua_comment_trong_HTML\"><\/span><b>\u1ee8ng d\u1ee5ng c\u1ee7a comment trong HTML\u00a0<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Khi vi\u1ebft m\u00e3 HTML, vi\u1ec7c s\u1eed d\u1ee5ng comment \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c ghi ch\u00fa, \u0111\u00e1nh d\u1ea5u ho\u1eb7c t\u1ea1m th\u1eddi v\u00f4 hi\u1ec7u h\u00f3a m\u1ed9t ph\u1ea7n m\u00e3 m\u00e0 kh\u00f4ng l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn giao di\u1ec7n hay ch\u1ee9c n\u0103ng c\u1ee7a trang web. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh l\u00e0m vi\u1ec7c v\u00e0 n\u00e2ng cao hi\u1ec7u qu\u1ea3 ph\u00e1t tri\u1ec3n.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>T\u1ed5 ch\u1ee9c m\u00e3:<\/b><span style=\"font-weight: 400;\"> Comment gi\u00fap chia nh\u1ecf c\u00e1c ph\u1ea7n m\u00e3 d\u1ec5 \u0111i\u1ec1u h\u01b0\u1edbng h\u01a1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c d\u1ef1 \u00e1n l\u1edbn v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng m\u00e3 ph\u1ee9c t\u1ea1p.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>H\u1ed7 tr\u1ee3 l\u00e0m vi\u1ec7c nh\u00f3m:<\/b><span style=\"font-weight: 400;\"> Comment cung c\u1ea5p l\u1eddi gi\u1ea3i th\u00edch v\u1ec1 l\u00fd do t\u1ea1i sao m\u1ed9t s\u1ed1 th\u00e0nh ph\u1ea7n HTML nh\u1ea5t \u0111\u1ecbnh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ho\u1eb7c \u0111\u1ec3 l\u1ea1i h\u01b0\u1edbng d\u1eabn, gi\u00fap c\u00e1c th\u00e0nh vi\u00ean trong nh\u00f3m d\u1ec5 d\u00e0ng hi\u1ec3u v\u00e0 ph\u1ed1i h\u1ee3p hi\u1ec7u qu\u1ea3.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Debug hi\u1ec7u qu\u1ea3:<\/b><span style=\"font-weight: 400;\"> V\u00f4 hi\u1ec7u h\u00f3a t\u1ea1m th\u1eddi c\u00e1c ph\u1ea7n m\u00e3 HTML b\u1eb1ng c\u00e1ch ch\u00fa th\u00edch ch\u00fang l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f4 l\u1eadp c\u00e1c v\u1ea5n \u0111\u1ec1 \u0111\u1ec3 ki\u1ec3m tra v\u00e0 kh\u1eafc ph\u1ee5c l\u1ed7i nhanh ch\u00f3ng.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>T\u00e0i li\u1ec7u h\u00f3a: <\/b><span style=\"font-weight: 400;\">Comment \u0111\u00f3ng vai tr\u00f2 cung c\u1ea5p th\u00f4ng tin chi ti\u1ebft ho\u1eb7c ghi ch\u00fa trong m\u00e3 \u0111\u1ec3 tham kh\u1ea3o trong t\u01b0\u01a1ng lai m\u00e0 kh\u00f4ng c\u1ea7n t\u00e0i li\u1ec7u b\u00ean ngo\u00e0i.<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cau_hoi_thuong_gap_ve_comment_trong_HTML\"><\/span><b>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 comment trong HTML<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><b>C\u00f3 th\u1ec3 comment l\u1ed3ng nhau trong HTML \u0111\u01b0\u1ee3c kh\u00f4ng?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">C\u00e2u tr\u1ea3 l\u1eddi l\u00e0 <strong>Kh\u00f4ng<\/strong>, kh\u00f4ng th\u1ec3 comment l\u1ed3ng nhau trong HTML. N\u1ebfu b\u1ea1n \u0111\u1eb7t m\u1ed9t comment b\u00ean trong m\u1ed9t comment kh\u00e1c, tr\u00ecnh duy\u1ec7t s\u1ebd kh\u00f4ng hi\u1ec3u \u0111\u00fang c\u00fa ph\u00e1p v\u00e0 c\u00f3 th\u1ec3 g\u00e2y l\u1ed7i hi\u1ec3n th\u1ecb. V\u00ed d\u1ee5, \u0111o\u1ea1n m\u00e3 sau s\u1ebd hi\u1ec3n th\u1ecb l\u1ed7i:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;!-- \u0110\u00e2y l\u00e0 m\u1ed9t comment &lt;!-- \u0110\u00e2y l\u00e0 comment l\u1ed3ng nhau --&gt; --&gt;<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">N\u1ebfu b\u1ea1n c\u1ea7n v\u00f4 hi\u1ec7u h\u00f3a m\u1ed9t ph\u1ea7n l\u1edbn m\u00e3 HTML c\u00f3 ch\u1ee9a comment, h\u00e3y x\u00f3a ho\u1eb7c di chuy\u1ec3n comment b\u00ean trong \u0111\u1ec3 tr\u00e1nh l\u1ed7i.<\/span><\/p>\n<h3><b>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 comment m\u1ed9t \u0111o\u1ea1n m\u00e3 HTML l\u1edbn?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">\u0110\u1ec3 comment m\u1ed9t \u0111o\u1ea1n m\u00e3 HTML nhi\u1ec1u n\u1ed9i dung, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1eb7t to\u00e0n b\u1ed9 n\u1ed9i dung trong c\u1eb7p th\u1ebb &lt;!&#8211; &#8211;&gt;. V\u00ed d\u1ee5:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;!--\u00a0<\/span>\n\n<span style=\"font-weight: 400;\">&lt;div&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;h2&gt;Ti\u00eau \u0111\u1ec1&lt;\/h2&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;p&gt;\u0110\u00e2y l\u00e0 m\u1ed9t \u0111o\u1ea1n v\u0103n.&lt;\/p&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;\/div&gt;<\/span>\n\n<span style=\"font-weight: 400;\">--&gt;<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">Tuy nhi\u00ean, n\u1ebfu trong \u0111o\u1ea1n m\u00e3 c\u00f3 ch\u1ee9a comment, b\u1ea1n c\u1ea7n x\u00f3a ho\u1eb7c \u0111i\u1ec1u ch\u1ec9nh comment b\u00ean trong \u0111\u1ec3 tr\u00e1nh l\u1ed7i.<\/span><\/p>\n<h3><b>Ph\u00edm t\u1eaft \u0111\u1ec3 t\u1ea1o b\u00ecnh lu\u1eadn nhanh trong HTML l\u00e0 g\u00ec?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">H\u1ea7u h\u1ebft c\u00e1c tr\u00ecnh so\u1ea1n th\u1ea3o m\u00e3 ngu\u1ed3n nh\u01b0 VS Code hay Sublime Text \u0111\u1ec1u h\u1ed7 tr\u1ee3 ph\u00edm t\u1eaft \u0111\u1ec3 t\u1ea1o b\u00ecnh lu\u1eadn nhanh trong HTML. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>\u0110\u1ed1i v\u1edbi Windows ho\u1eb7c Linux: <\/b><span style=\"font-weight: 400;\">D\u00f9ng t\u1ed5 h\u1ee3p ph\u00edm Ctrl + \/<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>\u0110\u1ed1i v\u1edbi Mac: <\/b><span style=\"font-weight: 400;\">T\u1ed5 h\u1ee3p ph\u00edm Cmd + \/<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">B\u1ea1n ch\u1ec9 c\u1ea7n ch\u1ecdn \u0111o\u1ea1n m\u00e3 HTML c\u1ea7n comment v\u00e0 nh\u1ea5n t\u1ed5 h\u1ee3p ph\u00edm n\u00e0y, tr\u00ecnh so\u1ea1n th\u1ea3o s\u1ebd t\u1ef1 \u0111\u1ed9ng th\u00eam &lt;!&#8211; v\u00e0 &#8211;&gt; v\u00e0o \u0111o\u1ea1n m\u00e3 \u0111\u00f3.<\/span><\/p>\n<h3><b>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 comment trong CSS v\u00e0 JavaScript?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Kh\u00e1c v\u1edbi HTML, \u0111\u1ec3 comment trong <\/span><a href=\"\/blog\/css-la-gi\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">CSS<\/span><\/a><span style=\"font-weight: 400;\">, b\u1ea1n s\u1ebd d\u00f9ng \/* *\/ \u0111\u1ec3 comment m\u1ed9t d\u00f2ng ho\u1eb7c nhi\u1ec1u d\u00f2ng. V\u00ed d\u1ee5 nh\u01b0:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">\/* \u0110\u00e2y l\u00e0 m\u1ed9t comment trong CSS *\/<\/span>\n<span style=\"font-weight: 400;\">p {<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0color: black; \/* Ch\u00fa th\u00edch cho thu\u1ed9c t\u00ednh m\u00e0u s\u1eafc *\/<\/span>\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">\u0110\u1ed1i v\u1edbi <\/span><a href=\"\/blog\/javascript-la-gi\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">JavaScript<\/span><\/a><span style=\"font-weight: 400;\">, b\u1ea1n c\u00f3 th\u1ec3 comment theo 2 c\u00e1ch nh\u01b0 sau:<\/span><\/p>\n<p><strong>Comment m\u1ed9t d\u00f2ng:<\/strong><\/p>\n<pre><span style=\"font-weight: 400;\">\/\/ \u0110\u00e2y l\u00e0 m\u1ed9t comment m\u1ed9t d\u00f2ng trong JavaScript<\/span>\n<span style=\"font-weight: 400;\">console.log(\"Hello, world!\");<\/span><\/pre>\n<p><strong>Comment nhi\u1ec1u d\u00f2ng:<\/strong><\/p>\n<pre><span style=\"font-weight: 400;\">\/*<\/span>\n<span style=\"font-weight: 400;\">\u0110\u00e2y l\u00e0 comment nhi\u1ec1u d\u00f2ng<\/span>\n<span style=\"font-weight: 400;\">trong JavaScript.<\/span>\n<span style=\"font-weight: 400;\">*\/<\/span>\n<span style=\"font-weight: 400;\">console.log(\"Hello, world!\");<\/span><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"Tong_ket\"><\/span><b>T\u1ed5ng k\u1ebft<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Comment trong HTML<span style=\"font-weight: 400;\"> c\u00f3 c\u00f4ng d\u1ee5ng gi\u00fap l\u1eadp tr\u00ecnh vi\u00ean t\u1ed5 ch\u1ee9c v\u00e0 ghi ch\u00fa m\u00e3 ngu\u1ed3n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. Vi\u1ec7c s\u1eed d\u1ee5ng comment m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd trong HTML kh\u00f4ng ch\u1ec9 gi\u00fap t\u0103ng t\u00ednh d\u1ec5 \u0111\u1ecdc c\u1ee7a m\u00e3 m\u00e0 c\u00f2n h\u1ed7 tr\u1ee3 l\u00e0m vi\u1ec7c nh\u00f3m t\u1ed1t h\u01a1n. Hy v\u1ecdng b\u00e0i vi\u1ebft \u0111\u00e3 gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1ch comment m\u1ed9t \u0111o\u1ea1n m\u00e3 HTML\u00a0\u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh l\u1eadp tr\u00ecnh c\u1ee7a m\u00ecnh nh\u00e9!\u00a0<\/span><\/p>\n<blockquote><p><i><span style=\"font-weight: 400;\">Xem th\u00eam: <\/span><\/i><a href=\"\/blog\/html-la-gi\/\" target=\"_blank\" rel=\"noopener\"><i><span style=\"font-weight: 400;\"><strong>Gi\u1ea3i \u0111\u00e1p \u201ct\u1ea5t t\u1ea7n t\u1eadt\u201d nh\u1eefng \u0111i\u1ec1u c\u1ea7n bi\u1ebft v\u1ec1 HTML<\/strong><\/span><\/i><\/a><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Comment trong HTML \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u00eam ghi ch\u00fa ho\u1eb7c gi\u1ea3i th\u00edch v\u00e0o \u0111o\u1ea1n m\u00e3 HTML m\u00e0 kh\u00f4ng hi\u1ec3n th\u1ecb tr\u1ef1c ti\u1ebfp tr\u00ean tr\u00ecnh duy\u1ec7t. Vi\u1ec7c s\u1eed d\u1ee5ng comment m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd s\u1ebd gi\u00fap m\u00e3 ngu\u1ed3n d\u1ec5 hi\u1ec3u, d\u1ec5 b\u1ea3o tr\u00ec v\u00e0 n\u00e2ng cao hi\u1ec7u su\u1ea5t l\u00e0m vi\u1ec7c.\u00a0 \u0110\u1ecdc b\u00e0i vi\u1ebft sau \u0111\u00e2y [&hellip;]<\/p>\n","protected":false},"author":207,"featured_media":85360,"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-85078","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>Comment trong HTML nh\u01b0 th\u1ebf n\u00e0o? C\u00e1ch s\u1eed d\u1ee5ng chi ti\u1ebft t\u1eeb A-Z - ITviec Blog<\/title>\n<meta name=\"description\" content=\"Comment trong HTML c\u00f3 c\u00f4ng d\u1ee5ng ghi ch\u00fa, gi\u1ea3i th\u00edch m\u00e3. Sau \u0111\u00e2y l\u00e0 c\u00e1ch \u0111\u1ec3 t\u1ea1o comment trong HTML gi\u00fap m\u00e3 d\u1ec5 ch\u1ec9nh s\u1eeda h\u01a1n.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/itviec.com\/blog\/comment-trong-html\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comment trong HTML nh\u01b0 th\u1ebf n\u00e0o? 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