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JavaScript: Difference between revisions
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JavaScript is a single-threaded programming language. In the browser, JS is event-driven, meaning that after initialization, the JS engine is idle until an event occurs such as a button being pressed in the DOM. | |||
This page is a mostly about browser-based JavaScript or ECMAScript usage and interaction with the HTML DOM (window). | This page is a mostly about browser-based JavaScript or ECMAScript usage and interaction with the HTML DOM (window). | ||
For server and desktop application JavaScript usage, please see the [[NodeJS]] page. | For server and desktop application JavaScript usage, please see the [[NodeJS]] page. | ||
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==Web Workers== | |||
By default, JavaScript is a single-threaded language. For things that take a long time, people usually use asynchronous JS through promises and callbacks. However, if you have a heavy calculation that needs to be performed, you can use spawn web workers which will run in background threads. NodeJS also has a similar concept called [https://nodejs.org/api/worker_threads.html Worker Threads]. | |||
===Getting Started=== | |||
;Your main JS file: | |||
;Your worker JS file: | |||
Resources | |||
* [https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers MDN: Using web workers] | |||
* [https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API Web Workers API] | |||
==Useful Packages== | ==Useful Packages== | ||