Use the strict equality operator when comparing variables

Written byPhuoc Nguyen

Created

25 Feb, 2021

Tags

JavaScript

When checking whether two given variables equal to each other, always use the strict equality (`===`) instead of the equality (`==`) operator.

The `===` operator not only checks the values, but also the types of variables. It's safer then `==` which performs type conversions before comparing the values.

0 == false; // true
0 === false; // false

0 == []; // true
0 === []; // false

0 == ''; // true
0 === ''; // false

You can take a look at == vs === to see more examples.

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Use the strict equality operator when comparing variables

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