38 lines
768 B
JavaScript
38 lines
768 B
JavaScript
// original sourc
|
|
// https://github.com/rackt/react-redux/blob/master/src/utils/shallowEqual.js
|
|
// MIT license
|
|
export default function shallowEqual(objA, objB) {
|
|
if (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.
|
|
var bHasOwnProperty = Object.prototype.hasOwnProperty.bind(objB);
|
|
for (var i = 0; i < keysA.length; i++) {
|
|
if (
|
|
!bHasOwnProperty(keysA[i]) ||
|
|
objA[keysA[i]] !== objB[keysA[i]]
|
|
) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|