Return a Default Value with Promises Using catch
Last week I tweeted all of you looking for your best JavaScript Array and Promise tricks, and as always, it didn't disappoint -- I learned quite a bit!
Today's JavaScript Promise trick is brought to you by Claudio Semeraro: how to use catch to set a default value instead of a try/catch:
// Instead of wrapping this block in a try/catch...
const result = await new Promise(
(resolve, reject) => reject("Because Stone Cold said so")
)
// ...use catch to set the default value (100)
.catch(() => 100);
As a trick I really like what's this brings; as far as readability and maintenance, if you don't know the trick, you might get confused. What do you think?
![Responsive and Infinitely Scalable JS Animations]()
Back in late 2012 it was not easy to find open source projects using requestAnimationFrame() - this is the hook that allows Javascript code to synchronize with a web browser's native paint loop. Animations using this method can run at 60 fps and deliver fantastic...
![Create a CSS Cube]()
CSS cubes really showcase what CSS has become over the years, evolving from simple color and dimension directives to a language capable of creating deep, creative visuals. Add animation and you've got something really neat. Unfortunately each CSS cube tutorial I've read is a bit...
![Adding Events to Adding Events in MooTools]()
Note: This post has been updated.
One of my huge web peeves is when an element has click events attached to it but the element doesn't sport the "pointer" cursor. I mean how the hell is the user supposed to know they can/should click on...
![Create Custom Events in MooTools 1.2]()
Javascript has a number of native events like "mouseover," "mouseout", "click", and so on. What if you want to create your own events though? Creating events using MooTools is as easy as it gets.
The MooTools JavaScript
What's great about creating custom events in MooTools is...
