{"id":13374,"date":"2026-09-07T17:10:17","date_gmt":"2026-09-07T10:10:17","guid":{"rendered":"https:\/\/webie.com.vn\/?p=13374"},"modified":"2026-09-07T17:10:29","modified_gmt":"2026-09-07T10:10:29","slug":"how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat","status":"publish","type":"post","link":"https:\/\/webie.com.vn\/fr\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/","title":{"rendered":"How to Make Your Website Faster in 2026: Cut the JavaScript Bloat"},"content":{"rendered":"<p class=\"wp-block-paragraph\">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 rank better. Here is how website speed works today and where Vietnamese SMEs can trim the fat without breaking anything.<\/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\">Table des mati\u00e8res<\/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\/fr\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#Why_Website_Speed_Still_Decides_Whether_You_Get_the_Sale\" >Why Website Speed Still Decides Whether You Get the Sale<\/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\/fr\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#The_Hidden_Culprit_JavaScript_You_No_Longer_Need\" >The Hidden Culprit: JavaScript You No Longer Need<\/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\/fr\/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\" >What Is \u201cBaseline\u201d and Why It Changes the Game<\/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\/fr\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#5_Heavy_Libraries_Modern_Browsers_Can_Replace\" >5 Heavy Libraries Modern Browsers Can Replace<\/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\/fr\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#What_This_Means_for_Vietnamese_SME_Websites\" >What This Means for Vietnamese SME Websites<\/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\/fr\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#How_to_Start_Trimming_Safely\" >How to Start Trimming Safely<\/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\/fr\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#Audit_Before_You_Delete\" >Audit Before You Delete<\/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\/fr\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#Check_Browser_Support_for_Your_Real_Visitors\" >Check Browser Support for Your Real Visitors<\/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\/fr\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#Make_It_a_Quarterly_Habit\" >Make It a Quarterly Habit<\/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\/fr\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#Frequently_Asked_Questions\" >Questions fr\u00e9quemment pos\u00e9es<\/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\/fr\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/#Turn_Speed_Into_More_Leads\" >Turn Speed Into More Leads<\/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>Why Website Speed Still Decides Whether You Get the Sale<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Speed is not a vanity metric. Every extra second of load time pushes bounce rates up and conversions down, and Google&#8217;s Core Web Vitals bake loading and responsiveness directly into how pages are ranked. For a business that pays for every click through ads, a slow page means you are buying traffic and then losing it at the door.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On mobile, where most Vietnamese customers browse, the effect is even harsher. Phones have less processing power, so all that extra JavaScript takes longer to download, parse, and run. Cutting unnecessary code is one of the few improvements that helps SEO, ad efficiency, and user experience at the same time.<\/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>The Hidden Culprit: JavaScript You No Longer Need<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Most websites carry libraries that were added years ago to solve problems the browser could not handle back then. The catch is that the web platform kept evolving while those dependencies stayed in the bundle. According to Smashing Magazine, a typical mid-sized app often hides 60\u201390KB of minified, gzipped JavaScript that the browser can now do on its own, dead weight every visitor is forced to download.<\/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>What Is \u201cBaseline\u201d and Why It Changes the Game<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Baseline is an industry standard that tells you when a web feature is safely supported across Chrome, Edge, Firefox, and Safari. A feature is \u201cWidely available\u201d once it has been in all major browsers for about 30 months, meaning it is safe for nearly everyone. Baseline turns \u201ccan I use this yet?\u201d from a guess into a clear yes or no, so you can confidently replace old libraries with built-in browser features.<\/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 Heavy Libraries Modern Browsers Can Replace<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">You do not need a rebuild to benefit. These are common dependencies that native browser features can now cover, with typical savings noted:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Date and number formatting libraries \u2192 the built-in Intl APIs handle \u201cyesterday\u201d, currencies, and plurals in Vietnamese and dozens of languages (~14KB saved).<\/li>\n\n\n\n<li>Axios for basic requests \u2192 the native fetch with a timeout signal (~17KB saved).<\/li>\n\n\n\n<li>Modal and pop-up scripts \u2192 the native &lt;dialog> element and Popover API, with focus handling built in (~24KB saved).<\/li>\n\n\n\n<li>Lodash helpers \u2192 native structuredClone, Object.groupBy, and Set methods (~8KB+ saved).<\/li>\n\n\n\n<li>Popper.js for tooltip positioning \u2192 CSS anchor positioning, no JavaScript required.<\/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>What This Means for Vietnamese SME Websites<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Most SME sites in real estate, retail, F&amp;B, and education run on WordPress with a stack of plugins and themes that each ship their own JavaScript. The result is a homepage that looks fine on a designer&#8217;s laptop but crawls on a mid-range Android over 4G \u2014 exactly the device your customer is holding.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You may not write code yourself, but you can ask your developer or agency one simple question: which scripts are we still loading that the browser could handle natively? Even trimming a few outdated plugins and libraries can move your Core Web Vitals from red to green, and that shift is visible in both rankings and booking numbers.<\/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>How to Start Trimming Safely<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The goal is to remove weight without removing features. A careful, staged approach keeps the site stable while it gets faster.<\/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>Audit Before You Delete<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">List what your site actually loads and measure the weight of each dependency with a tool like Bundlephobia or your browser&#8217;s network tab. Target the biggest, oldest libraries first, and confirm a native replacement truly covers your use case before removing anything.<\/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>Check Browser Support for Your Real Visitors<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Look at your analytics to see which browsers your customers actually use, then check each feature&#8217;s status on webstatus.dev or MDN. If a feature is only \u201cNewly available\u201d, add a simple fallback so older phones still work, progressive enhancement over guesswork.<\/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>Make It a Quarterly Habit<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The browser platform keeps gaining features, so this is not a one-time cleanup. A short quarterly review of your dependencies keeps your site lean as the web evolves, instead of letting bloat pile back up over time.<\/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>Questions fr\u00e9quemment pos\u00e9es<\/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>Will removing JavaScript break my website?<\/strong><\/strong> <p class=\"schema-faq-answer\">Not if you test properly. Replace one library at a time with a Baseline-supported feature, add a fallback where needed, and check the site on real devices before publishing. Staged changes are low risk and easy to roll back.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1788775399525\"><strong class=\"schema-faq-question\"><strong>How much faster will my site actually get?<\/strong><\/strong> <p class=\"schema-faq-answer\">It depends on how bloated your site is now, but cutting 60\u201390KB of script noticeably improves load and interaction time, especially on mobile. Combined with image and hosting optimization, it is often enough to pass 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>Turn Speed Into More Leads<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph translation-block\">A faster website is one of the cheapest growth levers you have: it lifts SEO, stretches every ad dollar, and converts more of the traffic you already pay for. If you want a professional speed and Core Web Vitals review of your site, explore our <a href=\"https:\/\/webie.com.vn\/fr\/services\/\" target=\"_self\"><u>website performance and design services<\/u><\/a>&nbsp;or talk to the Webie team directly at hotline +84 969 838 467 or 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":2,"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 v26.5 (Yoast SEO v27.4) - 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\/fr\/how-to-make-your-website-faster-in-2026-cut-the-javascript-bloat\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\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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