JavaScript waitForTime
I write a lot of tests for new features within Firefox DevTools. We have hundreds of "mochitests" which open the browser and perform synthetic actions like clicking, typing, and other user actions. I've previously written about waitForever
which essentially halts following actions without locking the browser. Another utility I enjoy is waitForTime
, an async JavaScript function that I can await
to give breathing time between two tasks.
Whenever I want to wait a given amount of time between tasks, I employ this function:
function waitForTime(ms) {
return new Promise(r => setTimeout(r, ms));
}
/* Usage */
await waitForTime(200);
// ...do other thing...
await waitForTime(200);
// ...do next thing ...
It's important to point out that most waitForTime
calls don't appear in the final test, since arbitrary timeouts lead to intermittent test failures, but they are helpful in knowing where I need to add polling for some other condition!
![LightFace: Facebook Lightbox for MooTools]()
One of the web components I've always loved has been Facebook's modal dialog. This "lightbox" isn't like others: no dark overlay, no obnoxious animating to size, and it doesn't try to do "too much." With Facebook's dialog in mind, I've created LightFace: a Facebook lightbox...
![CSS vs. JS Animation: Which is Faster?]()
How is it possible that JavaScript-based animation has secretly always been as fast — or faster — than CSS transitions? And, how is it possible that Adobe and Google consistently release media-rich mobile sites that rival the performance of native apps?
This article serves as a point-by-point...
![CSS Columns]()
One major gripe that we've always had about CSS is that creating layouts seems to be more difficult than it should be. We have, of course, adapted and mastered the techniques for creating layouts, but there's no shaking the feeling that there should be a...
![Create a Dojo Lightbox with dojox.image.Lightbox]()
One of the reasons I love the Dojo Toolkit is that it seems to have everything. No scouring for a plugin from this site and then another plugin from that site to build my application. Buried within the expansive dojox
namespace of Dojo is
I have this kind of a function in all my apps and I usually name is delay.
You don’t have to put “async” in front of the function?