$if 💰Expression based conditional.
You can read this as dolla'-if.
Javascript's if
is unfortunately not an expression, which means you can't use it as a right hand side of an expression or in places where you can only put a single value. Luckily, $if
can function as an expression.
Installation
For now, you can only use this with node.js, or using a bundler, because it's not exposing any globals, but who are we kidding, it's 2020, you probably do this daily already.
npm install --save dolla-
Examples
This if-expression works like a regular if-else clause, except, your expression has a return value:
const $if = ;// or to you who live in the future: // import $if from 'dolla-if'; const isPartyTime = > 20 || < 5;const myFriendsCallMe = ;console;
It's especially useful when you're trying to use some inline react JSX, because those inline curlies only support expressions, so unless you want to do some IIFE ugliness:
const RegularHeader = dayOfTheWeek return <div> </div>
You can also use it with unit functions, to short circuit execution of branches where the chain executes to false:
const result = ;
In this above example, only one of the branches gets executed, so you don't need to worry about all the wasted calculation or unwanted side-effects.
And $if also supports types through Typescript!
Contains no meat™!