| 1 | export default function shallowEqual(objA, objB) {
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| 2 | if (objA === objB) {
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| 3 | return true
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| 4 | }
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| 5 |
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| 6 | const keysA = Object.keys(objA)
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| 7 | const keysB = Object.keys(objB)
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| 8 |
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| 9 | if (keysA.length !== keysB.length) {
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| 10 | return false
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| 11 | }
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| 12 |
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| 13 | // Test for A's keys different from B.
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| 14 | const hasOwn = Object.prototype.hasOwnProperty
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| 15 | for (let i = 0; i < keysA.length; i++) {
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| 16 | if (!hasOwn.call(objB, keysA[i]) ||
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| 17 | objA[keysA[i]] !== objB[keysA[i]]) {
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| 18 | return false
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| 19 | }
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| 20 | }
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| 21 |
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| 22 | return true
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| 23 | }
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