So we can check if value is null or undefined

Question

So we can check if value is null or undefined

with "===" right ?

or just use "==" ?

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Comparison_Operators?v=control#Equality

0

25.04.2017

2 ответов

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Thomas

typeof x === 'undefined'

0

26.04.2017

Ruri Gk · Accepted Answer

Ruri Gk

Sometimes i preffer typeof x == "undefined"

0

26.04.2017

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