JS: Infinity

Infinity is a builtin value.

Infinity is typically returned when divide by zero.

console.log ( 1/0 === Infinity ); // true

Type of Infinity is "number".

[see JS: Value Types]

console.log ( typeof Infinity === "number" ); // true

Infinity === Infinity return true.

console.log ( Infinity === Infinity ); // true

Test Infinity

To test if a value is finite, use Number.isFinite.

[see JS: Number.isFinite]