How to Reduce Render Blocks

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2. Use Webpagetest If you want to see exactly how resources were loaded and which ones might be blocking the initial rendering of the page, use WebPageTest.org . How to identify critical resources: Run the test and click on the "waterfall" image. Focus on all requested and loaded resources until the green "Start Rendering" bar appears. Analyze what appears. Find CSS or JavaScript files that are requested before the green "start rendering" line, but are not critical to loading the finished content.

There are several ways. At the end of the section there is a comparison of list of cayman islands whatsapp phone numbers their effectiveness. Method 1: Place JavaScript at the bottom of your HTML file The higher any function is in the HTML file, the faster the browser will download and execute it. When an alert or popup function (for example) is placed at the top of the HTML code, the rendering of the page is immediately blocked and no visual content is displayed on the page.


This is what it might look like. The popup is implemented using JavaScript. This function is written at the beginning of the HTML document. Therefore, further rendering is suspended. When the JavaScript function is moved to the bottom of the HTML, some visual content appears on the page before the page rendering is blocked. Now everything is fine: This method is optimal for mission-critical scenarios, but there are other solutions that can help you truly defer non-critical scenarios.