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javascript/snippets/matches.md

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+---
+title: Match object properties
+type: snippet
+tags: [object]
+cover: two-flower-vases
+dateModified: 2020-11-03T22:11:18+02:00
+---
+
+Compares two objects to determine if the first one contains equivalent property values to the second one.
+
+- Use `Object.keys()` to get all the keys of the second object.
+- Use `Array.prototype.every()`, `Object.prototype.hasOwnProperty()` and strict comparison to determine if all keys exist in the first object and have the same values.
+
+```js
+const matches = (obj, source) =>
+  Object.keys(source).every(
+    key => obj.hasOwnProperty(key) && obj[key] === source[key]
+  );
+```
+
+```js
+matches({ age: 25, hair: 'long', beard: true }, { hair: 'long', beard: true });
+// true
+matches({ hair: 'long', beard: true }, { age: 25, hair: 'long', beard: true });
+// false
+```