Simplify your ifs in JavaScript and TypeScript

Let’s suppose you have the following:

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2
3
4

const result = value1;
if (result === null || result === undefined) {
  result = value2;
}

How can you reduce it to one line without writing if ?

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const result = value1 ?? value2;

OK, you gain 3 lines, but before you use it everywhere, think about 2 things for your use cases:

1. Is it changing something to the performance of your application?
2. Is it going to be as readable as the 3 lines to anyone, senior and junior?

Maybe, in the example, it’s OK to use the Nullish coalescing operator.

I would say it isn’t always the case.

Please read the MDN article on the Nullish coalescing operator on the topic.

Also check out this javascripttutorial.net article which I liked because it goes in detail with nice use cases.

Thanks for reading.