JavaScript waitForever
Writing mochitests for new features in DevTools can be difficult and time-consuming. There are so many elements interacting in an async manner that I oftentimes find myself using the debugger to debug the debugger! In the case where it's unclear what interaction isn't working properly, I find myself going to a neat utility function: waitForever. By using this function, paired with await, I can interact with the page while a given test is running to find the problem!
The JavaScript
waitForever is a super small snippet:
function waitForever() {
return new Promise(r => {});
}
// Usage:
await waitForever();
The function uses a promise which never resolves, thus no additional statements are triggered while also not locking up the browser. From there I can click around and explore elements to find what I've messed up in my test.
Utility functions like these make web development much easier and more enjoyable. Add this one to your toolbox!
For maximum performance, we all know we must put our assets on CDN (another domain). Along with those assets are custom web fonts. Unfortunately custom web fonts via CDN (or any cross-domain font request) don't work in Firefox or Internet Explorer (correctly so, by spec) though...
The <canvas> element has been a revelation for the visual experts among our ranks. Canvas provides the means for incredible and efficient animations with the added bonus of no Flash; these developers can flash their awesome JavaScript skills instead. Here are nine unbelievable canvas demos that...
If you troll page markup like me, you've no doubt seen the use of data URI's within image src attributes. Instead of providing a traditional address to the image, the image file data is base64-encoded and stuffed within the src attribute. Doing so saves...
A few months ago, Chris Coyier shared his favorite CodePen demos right here on David's blog. A while back David asked me to share some of my favorite pens too, so here are some of the demos that have blown my mind in the past...
Thanks for the tip David! I’ll keep that in mind when working on mochi tests. Have you found any other uses for this snippet?