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?
![Create a Sheen Logo Effect with CSS]()
I was inspired when I first saw Addy Osmani's original ShineTime blog post. The hover sheen effect is simple but awesome. When I started my blog redesign, I really wanted to use a sheen effect with my logo. Using two HTML elements and...
![CSS @supports]()
Feature detection via JavaScript is a client side best practice and for all the right reasons, but unfortunately that same functionality hasn't been available within CSS. What we end up doing is repeating the same properties multiple times with each browser prefix. Yuck. Another thing we...
![Create a Trailing Mouse Cursor Effect Using MooTools]()
Remember the old days of DHTML and effects that were an achievement to create but had absolutely no value? Well, a trailing mouse cursor script is sorta like that. And I'm sorta the type of guy that creates effects just because I can.
![MooTools’ AutoCompleter Plugin]()
One of the famous MooTools plugins is Harald Kirschner's AutoCompleter plugin. AutoCompleter takes a term input by the user and searches for matches -- an obviously help to the user. Here's how to make the most of Harald's great plugin.
The XHTML
All we...