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!
![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...
![Serving Fonts from CDN]()
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...
![Using Opacity to Show Focus with MooTools]()
I'm a huge fan of using subtle effects like link nudging (jQuery, MooTools) to enhance the user experience and increase the perceived dynamism of my websites. Trust me -- a lot of little things are what take websites to the next level.
![Dijit’s TabContainer Layout: Easy Tabbed Content]()
One of Dojo's major advantages over other JavaScript toolkits is its Dijit library. Dijit is a UI framework comprised of JavaScript widget classes, CSS files, and HTML templates. One very useful layout class is the TabContainer. TabContainer allows you to quickly create a tabbed content...
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?