Why Do You Need to Defer Parsing of JavaScript? So, defer parsing of JavaScript refers to optimizing the downloading and execution of JS script files to boost site load speed. This way, your audience can browse your website faster without waiting for JavaScript to download. It will execute the JS script files after loading all other elements of the website. The process assigns browsers to download JavaScript code simultaneously while loading other aspects of your site. You can defer JavaScript parsing for your website. So, is there a way to load other components of the site before downloading the JavaScript? Your audience should wait for several seconds to browse your website due to this delay. Only then your browser renders other elements of your site. It waits for the JS script files to finish downloading and execution. However, when it gets across a JavaScript code, the browser stops parsing the HTML file. It doesn’t stop the HTML parsing while downloading images, videos, or other content. On the way, if that browser finds a downloadable resource, then it begins the download. That browser downloads the file and starts rendering from the top HTML code until it reaches the end. After that, your browser renders it using the HTML parsing technique. This action commands the web browser to load that website on your screen. The process starts with you typing the URL of a site. We will give you a brief impression of how a website loads before explaining the phenomena of deferring parsing of JavaScript. Those elements might include animated graphics, maps, video jukeboxes, forms, etc. JavaScript is a programming line of code that allows you to add interactive, complex elements on your site.
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