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!
![Responsive Images: The Ultimate Guide]()
Chances are that any Web designers using our Ghostlab browser testing app, which allows seamless testing across all devices simultaneously, will have worked with responsive design in some shape or form. And as today's websites and devices become ever more varied, a plethora of responsive images...
![Animated 3D Flipping Menu with CSS]()
CSS animations aren't just for basic fades or sliding elements anymore -- CSS animations are capable of much more. I've showed you how you can create an exploding logo (applied with JavaScript, but all animation is CSS), an animated Photo Stack, a sweet...
![RealTime Stock Quotes with MooTools Request.Stocks and YQL]()
It goes without saying but MooTools' inheritance pattern allows for creation of small, simple classes that possess immense power. One example of that power is a class that inherits from Request, Request.JSON, and Request.JSONP: Request.Stocks. Created by Enrique Erne, this great MooTools class acts as...
![Google-Style Element Fading Using MooTools or jQuery]()
Google recently introduced an interesting effect to their homepage: the top left and top right navigation items don't display until you move your mouse or leave the search term box. Why? I can only speculate that they want their homepage as...
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?