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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | 17x 2x 15x 2x 13x 3x 10x 4x 6x | /**
* Checks whether a container holds nothing: an empty string, array, `Map`, `Set` or object. `null` and
* `undefined` count as empty.
*
* @param value - The value to check.
* @returns `true` for an empty container, `null` or `undefined`; `false` for a number or a boolean.
* @example
* isEmpty({}); // true
* isEmpty([0]); // false
* isEmpty(new Map()); // true
*/
export function isEmpty(value: unknown): boolean {
if (value === null || value === undefined) {
return true;
}
if (typeof value === 'string') {
return value.length === 0;
}
if (typeof value !== 'object') {
return false;
}
if (value instanceof Map || value instanceof Set) {
return value.size === 0;
}
return (
(Array.isArray(value) || ArrayBuffer.isView(value) ? Reflect.get(value, 'length') : Object.keys(value).length) === 0
);
}
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