JavaScript: Object.is

By Xah Lee. Date: . Last updated: .

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
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