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Use the strict equality operator when comparing variables

Written byPhuoc Nguyen
25 Feb, 2021
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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Phước Nguyễn