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!
![CSS 3D Folding Animation]()
Google Plus provides loads of inspiration for front-end developers, especially when it comes to the CSS and JavaScript wonders they create. Last year I duplicated their incredible PhotoStack effect with both MooTools and pure CSS; this time I'm going to duplicate...
![An Interview with Eric Meyer]()
Your early CSS books were instrumental in pushing my love for front end technologies. What was it about CSS that you fell in love with and drove you to write about it?
At first blush, it was the simplicity of it as compared to the table-and-spacer...
![TextboxList for MooTools and jQuery by Guillermo Rauch]()
I'll be honest with you: I still haven't figured out if I like my MooTools teammate Guillermo Rauch. He's got a lot stacked up against him. He's from Argentina so I get IM'ed about 10 times a day about how great Lionel...
![MooTools Window Object Dumping]()
Ever want to see all of the information stored within the window property of your browser? Here's your chance.
The XHTML
We need a wrapper DIV that we'll consider a console.
The CSS
I like making this look like a command-line console.
The MooTools JavaScript
Depending on what you have loaded...
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?