24 lines
718 B
Markdown
24 lines
718 B
Markdown
---
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title: matches
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tags: object,intermediate
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---
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Compares two objects to determine if the first one contains equivalent property values to the second one.
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- Use `Object.keys()` to get all the keys of the second object.
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- 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.
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```js
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const matches = (obj, source) =>
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Object.keys(source).every(
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key => obj.hasOwnProperty(key) && obj[key] === source[key]
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);
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```
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```js
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matches({ age: 25, hair: 'long', beard: true }, { hair: 'long', beard: true });
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// true
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matches({ hair: 'long', beard: true }, { age: 25, hair: 'long', beard: true });
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// false
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```
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