JavaScript: Test Equality

Double Equal Operator

The double equal operator == is for testing equality of primitives of the same Type. If operands are of different type, a type conversion is done first. Tip: never use double equal.

[see Double Equal Operator]

Triple Equal Operator

• Triple Equal Operator

Test Equality of Array/Object

• JavaScript: Test Object Equality 🚀

Test Equality of NaN

To compare NaN, use:

• Object.is
• Number.isNaN

Test Equality of Infinity

• Number.isFinite