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?
![From Webcam to Animated GIF: the Secret Behind chat.meatspac.es!]()
My team mate Edna Piranha is not only an awesome hacker; she's also a fantastic philosopher! Communication and online interactions is a subject that has kept her mind busy for a long time, and it has also resulted in a bunch of interesting experimental projects...
![CSS Filters]()
CSS filter support recently landed within WebKit nightlies. CSS filters provide a method for modifying the rendering of a basic DOM element, image, or video. CSS filters allow for blurring, warping, and modifying the color intensity of elements. Let's have...
![Sliding Labels Using MooTools]()
A week back I saw a great effect created by CSSKarma: input labels being animated horizontally. The idea is everything positive: elegant, practical, unobtrusive, and requires very little jQuery code. Luckily the effect doesn't require much MooTools code either!
The HTML
A...
![Create WordPress Page Templates with Custom Queries]()
One of my main goals with the redesign was to make it easier for visitors to find the information that was most popular on my site. Not to my surprise, posts about MooTools, jQuery, and CSS were at the top of the list. What...