Veteran programmers say things like “don’t block the event loop”, “make sure your code runs at 60 frames-per-second”, “well of course, it won’t work, that function is an asynchronous callback!”. None of these is easily understood by beginners and good explanations of how JavaScript works isn’t that easy to find. This video tutorial by Philip Roberts is simple enough and comes with some handy visualisations and fun hack for us to understand what how JavaScript works

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