Is javascript single-threaded?

Question

Is javascript running on single thread? If I declare a global array, and start changing it (eg removing elements) on AJAX callback and at the same time start changing the ve

Answer 1

JavaScript is single threaded.

The referenced post discusses differences of setTimeout on different machines...

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HTML5 introduces the concept of WebWorkers which executes JavaScript on multiple background threads. Though it is not supported on all browsers...

https://developer.mozilla.org/En/Using_web_workers

http://dev.w3.org/html5/workers/