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Yes! I completely forgot to include that one! Object.is() seems to be a "fixed" === since it also works when comparing NaN, unlike ===.
MDN gives a polyfill code:
if (!Object.is) { Object.is = function(x, y) { // SameValue algorithm if (x === y) { // Steps 1-5, 7-10 // Steps 6.b-6.e: +0 != -0 return x !== 0 || 1 / x === 1 / y; } else { // Step 6.a: NaN == NaN return x !== x && y !== y; } }; }
Yes! I completely forgot to include that one!
Object.is() seems to be a "fixed" === since it also works when comparing NaN, unlike ===.
MDN gives a polyfill code: