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Yes, I've used a similar technique myself; however I consider it only a last resort. But doesn't that require your language to have threads? Is it possible to do this in eg. Javascript?

There is no sleep call that i know of in javascript, but you are right it depends on the language and its implementation of sleep.

Edit: although you could emulate a sleep call by setting a (pediodic) timeout

For node.js, there is a module: https://www.npmjs.com/package/deasync

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