These are typically hosted by Google’s content delivery network and managed by teams that include security professionals. And tools like Bootstrap also use third-party JS libraries. Many websites use the library of prewritten JavaScript called JQuery-it’s used by 73% of the 10 million most popular websites. JavaScript is so essential to the modern web that most browsers include a dedicated JavaScript engine just to run it. But there’s a lot less stuff that you can do. Without JavaScript, the web is slightly faster, cleaner, and a lot less ads. The main reason to turn on JavaScript is so the internet works. The character counter on Twitter that lets you know if your tweet is too long? The credit card from your favorite online clothing store? Google Analytics? All JavaScript.įacebook, YouTube, and other video sites are also heavily dependent on JavaScript. It’s the force behind everything from Google Docs to popups. JavaScript basically handles interactive elements and things that move.
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