23 lines
662 B
Markdown
23 lines
662 B
Markdown
### isEmpty
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Returns true if the a value is an empty object, collection, map or set, has no enumerable properties or is any type that is not considered a collection.
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Check if the provided value is `null` or if its `length` is equal to `0`.
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```js
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const isEmpty = val => val == null || !(Object.keys(val) || val).length;
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```
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```js
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isEmpty(new Map()); // true
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isEmpty(new Set()); // true
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isEmpty([]); // true
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isEmpty({}); // true
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isEmpty(''); // true
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isEmpty([1, 2]); // false
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isEmpty({ a: 1, b: 2 }); // false
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isEmpty('text'); // false
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isEmpty(123); // true - type is not considered a collection
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isEmpty(true); // true - type is not considered a collection
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```
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