aem-react-js
Version:
AEM components written in React.
53 lines • 1.7 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
// tslint:disable-next-line:no-unbound-method
var hasOwnProperty = Object.prototype.hasOwnProperty;
/**
* inlined Object.is polyfill to avoid requiring consumers ship their own
*/
// tslint:disable-next-line:max-line-length
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
function is(x, y) {
// SameValue algorithm
if (x === y) {
// Steps 1-5, 7-10
// Steps 6.b-6.e: +0 != -0
// Added the nonzero y check to make Flow happy, but it is redundant
return x !== 0 || y !== 0 || 1 / x === 1 / y;
}
else {
// Step 6.a: NaN == NaN
return x !== x && y !== y;
}
}
/**
* Performs equality by iterating through keys on an object and returning false
* when any key has values which are not strictly equal between the arguments.
* Returns true when the values of all keys are strictly equal.
*/
function shallowEqual(objA, objB) {
if (is(objA, objB)) {
return true;
}
if (typeof objA !== 'object' ||
objA === null ||
typeof objB !== 'object' ||
objB === null) {
return false;
}
var keysA = Object.keys(objA);
var keysB = Object.keys(objB);
if (keysA.length !== keysB.length) {
return false;
}
// Test for A's keys different from B.
for (var _i = 0, keysA_1 = keysA; _i < keysA_1.length; _i++) {
var i = keysA_1[_i];
if (!hasOwnProperty.call(objB, i) || !is(objA[i], objB[i])) {
return false;
}
}
return true;
}
exports.shallowEqual = shallowEqual;
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