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The difference between the == and === operators in JavaScript

In JavaScript, the == and === operators are used to compare between two operands.

The == operator abstracts, that is, it makes the necessary type conversions before comparing the equality. Syntax of comparison: a == b .

The === operator compares strict equality, meaning that it will not perform type conversions. So if two values ​​are not of the same type, then when compared, the result will return false. Syntax of comparison: a === b .

The difference between the == and === operators in JavaScript Picture 1
The == and === operators in Javascript

Example 1:

 

Output:

 true false

Example 2:

 

Output:

 true false

Example 3:

 

Output:

 true false

In general, the === operator is recommended because it never performs type conversions when making comparisons, so it always produces accurate results.

Readers can learn more about other operators in the article: Operators in JavaScript.

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