Did You Know This JavaScript Trick? (Logical Assignment)

In today's video we'll be taking a look at Logical Assignment in JavaScript which lets you re-assign a variable depending on if it's truthy, falsy or nullish.

This is particularly useful when trying to set default values and avoids having to use a IF statement.

For your reference, check this out:

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#dcode #javascript

[herozuki]

much more informative and easier to understand than the udeny course I paid for

[ore_bear]

but the code gets much harder to read and if somebody dont now this they get stuck when they maintaining your code, so use it with care....

[ei_acc]

very very informative Dom! Keep it up🔥

[BakuraRyuk]

Thanks for the explanation! I got it now

[elementgames]

a &&= 20 is not equals if (a) { a = 20}

a &&= 20 is equals to a = a && 20
a ||= 20 is equals to a = a || 20
a ??= 20 is equals to a = a ?? 20

Both are one-line expressions. The only problem is understanding the new operators.

I have a feeling JavaScript will soon become similar with this abbreviation

a ??= false && 240 ? true : 0 ? undefined : null

[yerenzter]

Yes it's AND and OR this logical gates are never forget to me.

[abiodun]

This is called short-circuiting too, right ?

[Dimich]

This is why people hate JS.
But a useful content!

[isuke]

JS WHY SO SERIOUS :D
const tester = 12
let foo
foo = tester === 12 && ('YES') || ('NO')
console.log(foo) // YES