Is JavaScript multithreaded?

Question

Here\'s my issue - I need to dynamically download several scripts using jQuery.getScript() and execute certain JavaScript code after all the scripts were loaded, so my plan

Answer 1

The JavaScript (ECMAScript) specification does not define any threading or synchronization mechanisms.

Moreover, the JavaScript engines in our browsers are deliberately single-threaded, in part because allowing more than one UI thread to operate concurrently would open an enormous can of worms. So your assumption and implementation are correct.

As a sidenote, another commenter alluded to the fact that any JavaScriptengine vendor could add threading and synchronization features, or a vendor could enable users to implement those features themselves, as described in this article: Multi-threaded JavaScript?