Javascript: How to use the comparison operators - Debug Everything

Javascript: How to use the comparison operators - Debug Everything

Understand the differences in JavaScript between comparison operators == and != (=== and !==) and how they can affect your code.

Understand the differences in JavaScript between comparison operators == and != (=== and !==) and how they can affect your code.

JavaScript has two types of comparison operator: weak or abstract equality (==) and strict equality (===). The recommendation is to always use the latter.

A strict comparison (using, ===) is only valid if the operands are of the same type and if the contents of both correspond. Abstract comparison (using, ==) is more common, but it transforms(converts) the operands before the comparison, and this can cause countless problems.

At the end of the article there is a calculator with Javascript comparison operators for you to understand the concept in practice.

https://debugeverything.com/en/javascript-comparison-operator/

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