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Defer Parsing of JavaScript With YouTube Videos

Javascript, Tutorials | 19 July 2018

Deferring parsing of JavaScript is one of those messages that you get on sites like GTmetrix and other page speed sites that may sound like it’s from another planet. What on Earth does defer parsing of JavaScript even mean? Basically, what the message is saying is that a browser needs to process all of the content inside script tags before it can load the page. By putting off the processing of JavaScript until it is actually needed, you can reduce the initial load time of your page.

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