{"id":13374,"date":"2026-09-07T17:10:17","date_gmt":"2026-09-07T10:10:17","guid":{"rendered":"https:\/\/webie.com.vn\/?p=13374"},"modified":"2026-10-10T02:47:59","modified_gmt":"2026-10-09T19:47:59","slug":"how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat","status":"publish","type":"post","link":"https:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/","title":{"rendered":"C\u00e1ch t\u0103ng t\u1ed1c website n\u0103m 2026: C\u1eaft b\u1edbt JavaScript th\u1eeba"},"content":{"rendered":"<p class=\"wp-block-paragraph\">N\u1ebfu website c\u1ee7a b\u1ea1n ch\u1eadm, th\u1ee7 ph\u1ea1m th\u01b0\u1eddng kh\u00f4ng ph\u1ea3i hosting hay h\u00ecnh \u1ea3nh, m\u00e0 l\u00e0 \u0111\u1ed1ng JavaScript site ph\u1ea3i t\u1ea3i xong tr\u01b0\u1edbc khi kh\u00e1ch c\u00f3 th\u1ec3 l\u00e0m b\u1ea5t c\u1ee9 \u0111i\u1ec1u g\u00ec. N\u0103m 2026, tr\u00ecnh duy\u1ec7t hi\u1ec7n \u0111\u1ea1i \u0111\u00e3 t\u1ef1 l\u00e0m \u0111\u01b0\u1ee3c nhi\u1ec1u vi\u1ec7c tr\u01b0\u1edbc \u0111\u00e2y ph\u1ea3i nh\u1edd \u0111\u1ebfn c\u00e1c th\u01b0 vi\u1ec7n b\u00ean th\u1ee9 ba n\u1eb7ng n\u1ec1, ngh\u0129a l\u00e0 b\u1ea1n c\u00f3 th\u1ec3 y\u00ean t\u00e2m xo\u00e1 b\u1edbt code, t\u1ea3i nhanh h\u01a1n v\u00e0 l\u00ean top t\u1ed1t h\u01a1n. \u0110\u00e2y l\u00e0 c\u00e1ch t\u1ed1c \u0111\u1ed9 website v\u1eadn h\u00e0nh h\u00f4m nay v\u00e0 ch\u1ed7 SME Vi\u1ec7t Nam c\u00f3 th\u1ec3 c\u1eaft b\u1edbt m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng g\u00ec.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">M\u1ee5c L\u1ee5c<\/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:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#Why_Website_Speed_Still_Decides_Whether_You_Get_the_Sale\" >V\u00ec sao t\u1ed1c \u0111\u1ed9 website v\u1eabn quy\u1ebft \u0111\u1ecbnh b\u1ea1n c\u00f3 ch\u1ed1t \u0111\u01b0\u1ee3c \u0111\u01a1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#The_Hidden_Culprit_JavaScript_You_No_Longer_Need\" >Th\u1ee7 ph\u1ea1m \u1ea9n: JavaScript b\u1ea1n kh\u00f4ng c\u00f2n c\u1ea7n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#What_Is_%E2%80%9CBaseline%E2%80%9D_and_Why_It_Changes_the_Game\" >\u201cBaseline\u201d l\u00e0 g\u00ec v\u00e0 v\u00ec sao n\u00f3 thay \u0111\u1ed5i cu\u1ed9c ch\u01a1i<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#5_Heavy_Libraries_Modern_Browsers_Can_Replace\" >5 th\u01b0 vi\u1ec7n n\u1eb7ng m\u00e0 tr\u00ecnh duy\u1ec7t hi\u1ec7n \u0111\u1ea1i thay \u0111\u01b0\u1ee3c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#What_This_Means_for_Vietnamese_SME_Websites\" >\u0110i\u1ec1u n\u00e0y c\u00f3 \u00fd ngh\u0129a g\u00ec v\u1edbi website SME Vi\u1ec7t Nam<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#How_to_Start_Trimming_Safely\" >B\u1eaft \u0111\u1ea7u c\u1eaft g\u1ecdn an to\u00e0n th\u1ebf n\u00e0o<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#Audit_Before_You_Delete\" >R\u00e0 so\u00e1t tr\u01b0\u1edbc khi xo\u00e1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#Check_Browser_Support_for_Your_Real_Visitors\" >Ki\u1ec3m tra h\u1ed7 tr\u1ee3 tr\u00ecnh duy\u1ec7t cho \u0111\u00fang kh\u00e1ch c\u1ee7a b\u1ea1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#Make_It_a_Quarterly_Habit\" >Bi\u1ebfn n\u00f3 th\u00e0nh th\u00f3i quen m\u1ed7i qu\u00fd<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#Frequently_Asked_Questions\" >C\u00e2u H\u1ecfi Th\u01b0\u1eddng G\u1eb7p<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#Turn_Speed_Into_More_Leads\" >Bi\u1ebfn t\u1ed1c \u0111\u1ed9 th\u00e0nh nhi\u1ec1u lead h\u01a1n<\/a><\/li><\/ul><\/nav><\/div>\n<h2 id=\"h-why-website-speed-still-decides-whether-you-get-the-sale\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Website_Speed_Still_Decides_Whether_You_Get_the_Sale\"><\/span><strong>V\u00ec sao t\u1ed1c \u0111\u1ed9 website v\u1eabn quy\u1ebft \u0111\u1ecbnh b\u1ea1n c\u00f3 ch\u1ed1t \u0111\u01b0\u1ee3c \u0111\u01a1n<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ed1c \u0111\u1ed9 kh\u00f4ng ph\u1ea3i ch\u1ec9 s\u1ed1 l\u00e0m m\u00e0u. M\u1ed7i gi\u00e2y t\u1ea3i th\u00eam \u0111\u1ec1u \u0111\u1ea9y t\u1ec9 l\u1ec7 tho\u00e1t l\u00ean v\u00e0 t\u1ec9 l\u1ec7 chuy\u1ec3n \u0111\u1ed5i xu\u1ed1ng, c\u00f2n Core Web Vitals c\u1ee7a Google \u0111\u01b0a th\u1eb3ng t\u1ed1c \u0111\u1ed9 t\u1ea3i v\u00e0 \u0111\u1ed9 ph\u1ea3n h\u1ed3i v\u00e0o c\u00e1ch x\u1ebfp h\u1ea1ng trang. V\u1edbi m\u1ed9t doanh nghi\u1ec7p tr\u1ea3 ti\u1ec1n cho t\u1eebng c\u00fa click qu\u1ea3ng c\u00e1o, trang ch\u1eadm ngh\u0129a l\u00e0 b\u1ea1n mua traffic v\u1ec1 r\u1ed3i \u0111\u1ec3 m\u1ea5t ngay tr\u01b0\u1edbc c\u1eeda.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean di \u0111\u1ed9ng, n\u01a1i ph\u1ea7n l\u1edbn kh\u00e1ch Vi\u1ec7t Nam l\u01b0\u1edbt web, t\u00e1c \u0111\u1ed9ng c\u00f2n n\u1eb7ng h\u01a1n. \u0110i\u1ec7n tho\u1ea1i c\u00f3 n\u0103ng l\u1ef1c x\u1eed l\u00fd th\u1ea5p h\u01a1n, n\u00ean \u0111\u1ed1ng JavaScript d\u01b0 th\u1eeba m\u1ea5t nhi\u1ec1u th\u1eddi gian h\u01a1n \u0111\u1ec3 t\u1ea3i v\u1ec1, ph\u00e2n t\u00edch v\u00e0 ch\u1ea1y. C\u1eaft code kh\u00f4ng c\u1ea7n thi\u1ebft l\u00e0 m\u1ed9t trong s\u1ed1 \u00edt c\u1ea3i ti\u1ebfn gi\u00fap c\u1ea3 SEO, hi\u1ec7u qu\u1ea3 qu\u1ea3ng c\u00e1o l\u1eabn tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng c\u00f9ng l\u00fac.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-pixabay-270360-1024x682.jpg\" alt=\"\" class=\"wp-image-13375\" srcset=\"https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-pixabay-270360-1024x682.jpg 1024w, https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-pixabay-270360-300x200.jpg 300w, https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-pixabay-270360-767x511.jpg 767w, https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-pixabay-270360-1536x1023.jpg 1536w, https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-pixabay-270360-18x12.jpg 18w, https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-pixabay-270360-2048x1364.jpg 2048w, https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-pixabay-270360-720x480.jpg 720w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 id=\"h-the-hidden-culprit-javascript-you-no-longer-need\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Hidden_Culprit_JavaScript_You_No_Longer_Need\"><\/span><strong>Th\u1ee7 ph\u1ea1m \u1ea9n: JavaScript b\u1ea1n kh\u00f4ng c\u00f2n c\u1ea7n<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110a s\u1ed1 website mang theo nh\u1eefng th\u01b0 vi\u1ec7n \u0111\u01b0\u1ee3c th\u00eam v\u00e0o t\u1eeb nhi\u1ec1u n\u0103m tr\u01b0\u1edbc \u0111\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 m\u00e0 tr\u00ecnh duy\u1ec7t h\u1ed3i \u0111\u00f3 ch\u01b0a l\u00e0m \u0111\u01b0\u1ee3c. Tr\u1edb tr\u00eau l\u00e0 n\u1ec1n t\u1ea3ng web v\u1eabn ti\u1ebfn ho\u00e1 kh\u00f4ng ng\u1eebng, c\u00f2n nh\u1eefng th\u01b0 vi\u1ec7n \u0111\u00f3 th\u00ec v\u1eabn n\u1eb1m l\u1ea1i trong bundle. Theo Smashing Magazine, m\u1ed9t \u1ee9ng d\u1ee5ng c\u1ee1 trung b\u00ecnh th\u01b0\u1eddng gi\u1ea5u 60\u201390KB JavaScript (\u0111\u00e3 n\u00e9n, gzipped) m\u00e0 tr\u00ecnh duy\u1ec7t gi\u1edd t\u1ef1 l\u00e0m \u0111\u01b0\u1ee3c, tr\u1ecdng l\u01b0\u1ee3ng ch\u1ebft m\u00e0 m\u1ecdi kh\u00e1ch truy c\u1eadp \u0111\u1ec1u b\u1ecb bu\u1ed9c t\u1ea3i v\u1ec1.<\/p>\n\n\n\n<h2 id=\"h-what-is-baseline-and-why-it-changes-the-game\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_%E2%80%9CBaseline%E2%80%9D_and_Why_It_Changes_the_Game\"><\/span><strong>\u201cBaseline\u201d l\u00e0 g\u00ec v\u00e0 v\u00ec sao n\u00f3 thay \u0111\u1ed5i cu\u1ed9c ch\u01a1i<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Baseline l\u00e0 m\u1ed9t chu\u1ea9n c\u1ee7a ng\u00e0nh cho b\u1ea1n bi\u1ebft khi n\u00e0o m\u1ed9t t\u00ednh n\u0103ng web \u0111\u00e3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 an to\u00e0n tr\u00ean Chrome, Edge, Firefox v\u00e0 Safari. M\u1ed9t t\u00ednh n\u0103ng \u0111\u1ea1t \u201cWidely available\u201d khi \u0111\u00e3 c\u00f3 m\u1eb7t \u1edf m\u1ecdi tr\u00ecnh duy\u1ec7t l\u1edbn kho\u1ea3ng 30 th\u00e1ng, t\u1ee9c l\u00e0 an to\u00e0n v\u1edbi g\u1ea7n nh\u01b0 t\u1ea5t c\u1ea3 m\u1ecdi ng\u01b0\u1eddi. Baseline bi\u1ebfn c\u00e2u h\u1ecfi \u201cd\u00f9ng c\u00e1i n\u00e0y \u0111\u01b0\u1ee3c ch\u01b0a?\u201d t\u1eeb ch\u1ed7 ph\u1ea3i \u0111o\u00e1n th\u00e0nh m\u1ed9t c\u00e2u tr\u1ea3 l\u1eddi c\u00f3\/kh\u00f4ng r\u00f5 r\u00e0ng, \u0111\u1ec3 b\u1ea1n t\u1ef1 tin thay th\u01b0 vi\u1ec7n c\u0169 b\u1eb1ng t\u00ednh n\u0103ng c\u00f3 s\u1eb5n c\u1ee7a tr\u00ecnh duy\u1ec7t.<\/p>\n\n\n\n<h2 id=\"h-5-heavy-libraries-modern-browsers-can-replace\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Heavy_Libraries_Modern_Browsers_Can_Replace\"><\/span><strong>5 th\u01b0 vi\u1ec7n n\u1eb7ng m\u00e0 tr\u00ecnh duy\u1ec7t hi\u1ec7n \u0111\u1ea1i thay \u0111\u01b0\u1ee3c<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n kh\u00f4ng c\u1ea7n \u0111\u1eadp \u0111i l\u00e0m l\u1ea1i m\u1edbi h\u01b0\u1edfng l\u1ee3i. \u0110\u00e2y l\u00e0 nh\u1eefng th\u01b0 vi\u1ec7n ph\u1ed5 bi\u1ebfn m\u00e0 t\u00ednh n\u0103ng g\u1ed1c c\u1ee7a tr\u00ecnh duy\u1ec7t gi\u1edd c\u00f3 th\u1ec3 lo, k\u00e8m m\u1ee9c ti\u1ebft ki\u1ec7m \u0111i\u1ec3n h\u00ecnh<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Th\u01b0 vi\u1ec7n \u0111\u1ecbnh d\u1ea1ng ng\u00e0y v\u00e0 s\u1ed1 \u2192 c\u00e1c API Intl c\u00f3 s\u1eb5n x\u1eed l\u00fd \u201ch\u00f4m qua\u201d, ti\u1ec1n t\u1ec7 v\u00e0 s\u1ed1 nhi\u1ec1u b\u1eb1ng ti\u1ebfng Vi\u1ec7t c\u00f9ng h\u00e0ng ch\u1ee5c ng\u00f4n ng\u1eef (ti\u1ebft ki\u1ec7m ~14KB).<\/li>\n\n\n\n<li>Axios cho c\u00e1c request c\u01a1 b\u1ea3n \u2192 fetch g\u1ed1c k\u00e8m t\u00edn hi\u1ec7u timeout (ti\u1ebft ki\u1ec7m ~17KB).<\/li>\n\n\n\n<li>Script l\u00e0m modal v\u00e0 pop-up \u2192 th\u1ebb <dialog> g\u1ed1c v\u00e0 Popover API, \u0111\u00e3 t\u00edch h\u1ee3p s\u1eb5n x\u1eed l\u00fd focus (ti\u1ebft ki\u1ec7m ~24KB).<\/li>\n\n\n\n<li>C\u00e1c h\u00e0m ti\u1ec7n \u00edch Lodash \u2192 structuredClone, Object.groupBy v\u00e0 c\u00e1c method c\u1ee7a Set c\u00f3 s\u1eb5n (ti\u1ebft ki\u1ec7m ~8KB+).<\/li>\n\n\n\n<li>Popper.js \u0111\u1ec3 \u0111\u1ecbnh v\u1ecb tooltip \u2192 CSS anchor positioning, kh\u00f4ng c\u1ea7n JavaScript.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-cottonbro-6986455-1024x683.jpg\" alt=\"\" class=\"wp-image-13376\" srcset=\"https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-cottonbro-6986455-1024x683.jpg 1024w, https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-cottonbro-6986455-18x12.jpg 18w, https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-cottonbro-6986455-300x200.jpg 300w, https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-cottonbro-6986455-768x512.jpg 768w, https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-cottonbro-6986455-1536x1024.jpg 1536w, https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-cottonbro-6986455-2048x1365.jpg 2048w, https:\/\/webie.com.vn\/wp-content\/uploads\/2026\/09\/pexels-cottonbro-6986455-720x480.jpg 720w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 id=\"h-what-this-means-for-vietnamese-sme-websites\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_This_Means_for_Vietnamese_SME_Websites\"><\/span><strong>\u0110i\u1ec1u n\u00e0y c\u00f3 \u00fd ngh\u0129a g\u00ec v\u1edbi website SME Vi\u1ec7t Nam<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea7n l\u1edbn site SME trong b\u1ea5t \u0111\u1ed9ng s\u1ea3n, b\u00e1n l\u1ebb, F&amp;B v\u00e0 gi\u00e1o d\u1ee5c ch\u1ea1y tr\u00ean WordPress v\u1edbi m\u1ed9t ch\u1ed3ng plugin v\u00e0 theme, m\u1ed7i c\u00e1i l\u1ea1i k\u00e8m JavaScript ri\u00eang. K\u1ebft qu\u1ea3 l\u00e0 trang ch\u1ee7 tr\u00f4ng \u1ed5n tr\u00ean laptop c\u1ee7a designer nh\u01b0ng b\u00f2 ch\u1eadm tr\u00ean m\u1ed9t chi\u1ebfc Android t\u1ea7m trung d\u00f9ng 4G, \u0111\u00fang c\u00e1i m\u00e1y m\u00e0 kh\u00e1ch h\u00e0ng c\u1ee7a b\u1ea1n \u0111ang c\u1ea7m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 th\u1ec3 kh\u00f4ng t\u1ef1 vi\u1ebft code, nh\u01b0ng b\u1ea1n c\u00f3 th\u1ec3 h\u1ecfi l\u1eadp tr\u00ecnh vi\u00ean hay agency m\u1ed9t c\u00e2u \u0111\u01a1n gi\u1ea3n: ch\u00fang ta c\u00f2n \u0111ang t\u1ea3i nh\u1eefng script n\u00e0o m\u00e0 tr\u00ecnh duy\u1ec7t v\u1ed1n t\u1ef1 l\u00e0m \u0111\u01b0\u1ee3c? Ch\u1ec9 c\u1ea7n c\u1eaft v\u00e0i plugin v\u00e0 th\u01b0 vi\u1ec7n l\u1ed7i th\u1eddi c\u0169ng \u0111\u1ee7 k\u00e9o Core Web Vitals t\u1eeb \u0111\u1ecf sang xanh, v\u00e0 s\u1ef1 thay \u0111\u1ed5i \u0111\u00f3 th\u1ea5y r\u00f5 tr\u00ean c\u1ea3 th\u1ee9 h\u1ea1ng l\u1eabn s\u1ed1 l\u01b0\u1ee3ng \u0111\u01a1n \u0111\u1eb7t.<\/p>\n\n\n\n<h2 id=\"h-how-to-start-trimming-safely\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Start_Trimming_Safely\"><\/span><strong>B\u1eaft \u0111\u1ea7u c\u1eaft g\u1ecdn an to\u00e0n th\u1ebf n\u00e0o<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ee5c ti\u00eau l\u00e0 b\u1ecf tr\u1ecdng l\u01b0\u1ee3ng ch\u1ee9 kh\u00f4ng b\u1ecf t\u00ednh n\u0103ng. M\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn th\u1eadn tr\u1ecdng, chia giai \u0111o\u1ea1n s\u1ebd gi\u1eef site \u1ed5n \u0111\u1ecbnh trong l\u00fac n\u00f3 nhanh d\u1ea7n l\u00ean.<\/p>\n\n\n\n<h3 id=\"h-audit-before-you-delete\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Audit_Before_You_Delete\"><\/span><strong>R\u00e0 so\u00e1t tr\u01b0\u1edbc khi xo\u00e1<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Li\u1ec7t k\u00ea nh\u1eefng g\u00ec site th\u1ef1c s\u1ef1 t\u1ea3i v\u00e0 \u0111o tr\u1ecdng l\u01b0\u1ee3ng t\u1eebng th\u01b0 vi\u1ec7n b\u1eb1ng c\u00f4ng c\u1ee5 nh\u01b0 Bundlephobia ho\u1eb7c tab Network c\u1ee7a tr\u00ecnh duy\u1ec7t. Nh\u1eafm v\u00e0o c\u00e1c th\u01b0 vi\u1ec7n l\u1edbn nh\u1ea5t, c\u0169 nh\u1ea5t tr\u01b0\u1edbc, v\u00e0 x\u00e1c nh\u1eadn b\u1ea3n thay th\u1ebf g\u1ed1c th\u1eadt s\u1ef1 bao ph\u1ee7 \u0111\u00fang nhu c\u1ea7u c\u1ee7a b\u1ea1n tr\u01b0\u1edbc khi xo\u00e1 b\u1ea5t c\u1ee9 th\u1ee9 g\u00ec.<\/p>\n\n\n\n<h3 id=\"h-check-browser-support-for-your-real-visitors\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Check_Browser_Support_for_Your_Real_Visitors\"><\/span><strong>Ki\u1ec3m tra h\u1ed7 tr\u1ee3 tr\u00ecnh duy\u1ec7t cho \u0111\u00fang kh\u00e1ch c\u1ee7a b\u1ea1n<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Xem analytics \u0111\u1ec3 bi\u1ebft kh\u00e1ch h\u00e0ng th\u1ef1c s\u1ef1 d\u00f9ng tr\u00ecnh duy\u1ec7t n\u00e0o, r\u1ed3i ki\u1ec3m tra tr\u1ea1ng th\u00e1i t\u1eebng t\u00ednh n\u0103ng tr\u00ean webstatus.dev ho\u1eb7c MDN. N\u1ebfu m\u1ed9t t\u00ednh n\u0103ng m\u1edbi ch\u1ec9 \u1edf m\u1ee9c \u201cNewly available\u201d, h\u00e3y th\u00eam m\u1ed9t fallback \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 \u0111i\u1ec7n tho\u1ea1i \u0111\u1eddi c\u0169 v\u1eabn ch\u1ea1y \u0111\u01b0\u1ee3c, d\u00f9ng progressive enhancement thay v\u00ec \u0111o\u00e1n m\u00f2.<\/p>\n\n\n\n<h3 id=\"h-make-it-a-quarterly-habit\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Make_It_a_Quarterly_Habit\"><\/span><strong>Bi\u1ebfn n\u00f3 th\u00e0nh th\u00f3i quen m\u1ed7i qu\u00fd<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ec1n t\u1ea3ng tr\u00ecnh duy\u1ec7t li\u00ean t\u1ee5c c\u00f3 th\u00eam t\u00ednh n\u0103ng, n\u00ean \u0111\u00e2y kh\u00f4ng ph\u1ea3i vi\u1ec7c d\u1ecdn d\u1eb9p m\u1ed9t l\u1ea7n. M\u1ed9t bu\u1ed5i r\u00e0 so\u00e1t ng\u1eafn m\u1ed7i qu\u00fd s\u1ebd gi\u1eef site g\u1ecdn nh\u1eb9 theo \u0111\u00e0 web ti\u1ebfn ho\u00e1, thay v\u00ec \u0111\u1ec3 \u0111\u1ed1ng th\u1eeba ch\u1ea5t l\u1ea1i theo th\u1eddi gian.<\/p>\n\n\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span><strong>C\u00e2u H\u1ecfi Th\u01b0\u1eddng G\u1eb7p<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1788775397844\"><strong class=\"schema-faq-question\"><strong>Xo\u00e1 b\u1edbt JavaScript c\u00f3 l\u00e0m h\u1ecfng website kh\u00f4ng?<\/strong><\/strong> <p class=\"schema-faq-answer\">Kh\u00f4ng, n\u1ebfu b\u1ea1n test \u0111\u00e0ng ho\u00e0ng. H\u00e3y thay t\u1eebng th\u01b0 vi\u1ec7n m\u1ed9t b\u1eb1ng t\u00ednh n\u0103ng \u0111\u01b0\u1ee3c Baseline h\u1ed7 tr\u1ee3, th\u00eam fallback n\u01a1i c\u1ea7n, v\u00e0 ki\u1ec3m tra site tr\u00ean thi\u1ebft b\u1ecb th\u1eadt tr\u01b0\u1edbc khi xu\u1ea5t b\u1ea3n. Thay \u0111\u1ed5i theo t\u1eebng b\u01b0\u1edbc c\u00f3 r\u1ee7i ro th\u1ea5p v\u00e0 d\u1ec5 ho\u00e0n t\u00e1c.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1788775399525\"><strong class=\"schema-faq-question\"><strong>Site c\u1ee7a t\u00f4i th\u1ef1c s\u1ef1 nhanh h\u01a1n bao nhi\u00eau?<\/strong><\/strong> <p class=\"schema-faq-answer\">Tu\u1ef3 m\u1ee9c \u0111\u1ed9 n\u1eb7ng n\u1ec1 hi\u1ec7n t\u1ea1i c\u1ee7a site, nh\u01b0ng c\u1eaft \u0111\u01b0\u1ee3c 60\u201390KB script s\u1ebd c\u1ea3i thi\u1ec7n th\u1ea5y r\u00f5 th\u1eddi gian t\u1ea3i v\u00e0 t\u01b0\u01a1ng t\u00e1c, nh\u1ea5t l\u00e0 tr\u00ean di \u0111\u1ed9ng. K\u1ebft h\u1ee3p v\u1edbi t\u1ed1i \u01b0u h\u00ecnh \u1ea3nh v\u00e0 hosting, th\u01b0\u1eddng l\u00e0 \u0111\u1ee7 \u0111\u1ec3 v\u01b0\u1ee3t qua Core Web Vitals.<\/p> <\/div> <\/div>\n\n\n\n<h2 id=\"h-turn-speed-into-more-leads\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Turn_Speed_Into_More_Leads\"><\/span><strong>Bi\u1ebfn t\u1ed1c \u0111\u1ed9 th\u00e0nh nhi\u1ec1u lead h\u01a1n<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph translation-block\">M\u1ed9t website nhanh h\u01a1n l\u00e0 m\u1ed9t trong nh\u1eefng \u0111\u00f2n b\u1ea9y t\u0103ng tr\u01b0\u1edfng r\u1ebb nh\u1ea5t b\u1ea1n c\u00f3: n\u00f3 n\u00e2ng SEO, k\u00e9o d\u00e0i t\u1eebng \u0111\u1ed3ng qu\u1ea3ng c\u00e1o v\u00e0 chuy\u1ec3n \u0111\u1ed5i \u0111\u01b0\u1ee3c nhi\u1ec1u h\u01a1n l\u01b0\u1ee3ng traffic b\u1ea1n v\u1ed1n \u0111\u00e3 tr\u1ea3 ti\u1ec1n. N\u1ebfu mu\u1ed1n \u0111\u01b0\u1ee3c r\u00e0 so\u00e1t chuy\u00ean nghi\u1ec7p v\u1ec1 t\u1ed1c \u0111\u1ed9 v\u00e0 Core Web Vitals cho site, h\u00e3y tham kh\u1ea3o <a href=\"https:\/\/webie.com.vn\/vi\/services\/\" target=\"_self\"><u>d\u1ecbch v\u1ee5 t\u1ed1i \u01b0u hi\u1ec7u n\u0103ng v\u00e0 thi\u1ebft k\u1ebf website<\/u><\/a> c\u1ee7a Webie, ho\u1eb7c li\u00ean h\u1ec7 \u0111\u1ed9i ng\u0169 qua hotline +84 969 838 467 hay email huyen.dang@webie.com.vn.<\/p>","protected":false},"excerpt":{"rendered":"<p>If your website feels slow, the problem is often not your hosting or your images, it is the pile of JavaScript your site loads before a visitor can do anything. In 2026, modern browsers can handle many jobs that used to require heavy third-party libraries, which means you can safely delete code, load faster, and [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":13378,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[268,304,311],"class_list":["post-13374","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-website","tag-websitedesign","tag-website-speed","tag-website-optimization"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.6 (Yoast SEO v28.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to Make Your Website Faster: Cut JavaScript Bloat<\/title>\n<meta name=\"description\" content=\"Slow website? Modern browsers now replace 60\u201390KB of JavaScript. Learn which heavy libraries to cut for faster load, better SEO and more sales.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/webie.com.vn\/vi\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Make Your Website Faster in 2026: Cut the JavaScript Bloat\" \/>\n<meta property=\"og:description\" content=\"Slow website? Modern browsers now replace 60\u201390KB of JavaScript. 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