Feature: The “Exclude Pages from Optimization” feature in W3Speedster allows developers to completely bypass all frontend performance enhancements—including CSS/JS minification, lazy loading, image optimization, and resource deferral—for specified pages. This ensures that critical or sensitive pages retain their original behavior and structure, avoiding disruptions that may be caused by aggressive optimizations. Why We Need It […]
Doc Category: Magento
Exclude Images from Lazy Loading
Feature: The Exclude Resources from Lazy Loading feature in W3Speedster empowers developers to precisely define which assets, such as images, videos, js or iframes—should not be subjected to lazy loading. While lazy loading is essential for deferring non-critical content, certain resources (especially those above the fold or involved in early interactions) must load immediately to […]
Preload Resources
Feature: The Preload Resources feature in W3Speedster enables developers to instruct browsers to prioritize fetching specific critical resources early, before they are discovered through standard HTML parsing. By injecting <link rel=”preload”> directives into the document head, this mechanism accelerates the delivery of high-priority assets such as stylesheets, fonts, scripts, and images, improving page load speed […]
Exclusions
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Load Javascript Inline Script as URL
Feature: This feature in W3Speedster externalizes large or critical inline JavaScript code blocks by converting them into standalone files. These files are then referenced using standard <script src=”…”> tags. The goal is to reduce HTML size, improve browser caching, enable async or deferred loading, and comply with security practices like Content Security Policy (CSP). Why […]
Lazyload Javascript
Feature: Lazyload JavaScript is a performance-enhancing technique used by W3Speedster that delays the loading of non-critical JavaScript files until after the page’s primary content is displayed or the user interacts with the page (e.g., scroll, click, mouse movement). This method reduces render-blocking behavior and improves load times, especially on mobile devices and slower networks. W3Speedster […]
Enable Javascript Optimization
Feature: JavaScript enhances interactivity and functionality on web pages, but unoptimized JavaScript can slow down loading, increase server load, and negatively affect SEO. W3Speedster addresses this by offering JavaScript optimization, a set of techniques including minification, deferral, asynchronous loading, and combination of scripts. This ensures faster load times, reduced render-blocking, and better user experience across […]
Javascript Optimization
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Load Style Tag in Head to Avoid CLS
Feature: Cumulative Layout Shift (CLS) refers to the unexpected shifting of web elements during the loading phase of a webpage. These shifts typically occur due to delayed loading of styles, images, fonts, or other dynamic content. W3Speedster addresses this issue by injecting required CSS directly into the <head> tag, ensuring that all essential styles for […]
Start generating critical CSS
Feature: Start Generating Critical CSS is the command or action in W3Speedster that initiates the process of extracting and creating the critical CSS styles necessary for your website’s above-the-fold content. This process identifies and isolates the minimal set of CSS rules required to render the visible portion of a webpage immediately, deferring the loading of […]
