I wish we can have annex like "if host environment supports scheduling tasks to run after certain time, it have to expose Promise.delay method working in following way:".
But it's unlikely to happen because TC39 opposes describing communication with outside world in spec. On 16 Nov 2017 1:21 pm, "Naveen Chawla" <[email protected]> wrote: > Wouldn't it be more useful to have an async `delay(milliseconds)` > function, which simply takes a number (as an alternative to setTimeout), > instead of having to pass in a function whose code is executed and then the > code after it??? I have suggested that here before, but it happens to be a > browser spec feature thing, not a core language thing (at least not yet) - > since setTimeout itself is not yet in the core language, as far as I know > > On Thu, 16 Nov 2017 at 16:50 Eugene Melnikov <melnikaite.melnikaite@gmail. > com> wrote: > >> It’d be great to see native implementation of `waitFor` function. This >> function is used a lot in test frameworks and sometimes it’s necessary to >> wait something via polling. The syntax should be `await >> waitFor(function/primitives, timeout)`. Once function in first argument >> return anything except `false`, `null` or `undefined` next line of code >> will be executed. Second argument means period of time in ms to run >> function from first argument. Returned value of `waitFor` will be forwarded >> from executed function. In case first argument if primitive the first >> argument will be returned after delay specified in second argument. So it >> will be easy to make simple delay `async waitFor(true, 1000)` instead of >> `await new Promise(r => setTimeout(r, 1000))`. >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > >
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