JavaScript: Object.is

By Xah Lee. Date: 2017-02-14. Last updated: 2020-10-05.

New in JS2015.

Object.is( value1, value2 ): similar to value1 === value2, except when values are signed zeroes and NaN . [see Equality]

console.log( NaN === NaN); // false
console.log( Object.is( NaN, NaN) ); // true

console.log( -0 === +0); // true
console.log( Object.is (-0, +0) ); // false

∑ JS ^{in Depth}
XAH BUY NOW