while(true) vs setInterval(function(),0) [duplicate]

Answer 1

• while(1) generates an infinite loop, that is, JavaScript will simply run forever and never give control back to the browser, which therefor freezes, because it is unable to to anything else ever again (until the script is killed).

• setTimeout(func, 0) behaves differently in the sense that after it executes, control is given back to the browser, which may then decide what to do after. Setting 0ms in setTimeout does not guarantee that the JavaScript code is run directly after it stops. With the 0ms parameter you merely tell the browser that you'd like the code to run directly after it stops, but the browser is free to do something else entirely before actually doing so.