JavaScript === (Triple Equals)

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The triple equals sign in JavaScript means “equality without type coersion”. That means, the type and values must both be equal.

Take for example the scenario where 0 is false.

If we compare with 2 equal signs, the following statement is true. This is because the equality operator converts if they are not of the same type:

0 == false // true

If we compare the same 0 and false with ===, we have false returned. As 0 and false are different types, they are not equal in this case. The strict equality operators perform equality comparisons on operands of the same type.

0 === false // false

You can read more about comparison operators at Mozilla: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Comparison_Operators. The strict equality operators use the strict equality comparison algorithm.

 

ABOUT CARL DE SOUZA

Carl de Souza is a developer and architect focusing on Microsoft Dynamics 365, BI, Web, Cloud and Data Science.

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