@gvray/eskit
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A rich and colorful toolkit about typescript and javascript.
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TypeScript
/**
* Checks if a value is empty according to JavaScript's notion of emptiness.
* 根据JavaScript的空值概念检查值是否为空。
*
* A value is considered empty if it is:
* - `undefined` or `null`
* - An empty string, array, or array-like object
* - An empty Map or Set object
* - An object with no own enumerable properties
*
* 以下情况被认为是空值:
* - `undefined` 或 `null`
* - 空字符串、数组或类数组对象
* - 空的Map或Set对象
* - 没有自有可枚举属性的对象
*
* @param value - The value to check / 要检查的值
* @returns True if the value is empty / 如果值为空则返回true
*
* @example
* ```typescript
* // Primitive empty values / 原始空值
* isEmpty(undefined) // true
* isEmpty(null) // true
* isEmpty('') // true
* isEmpty(0) // false (zero is not empty)
* isEmpty(false) // false (false is not empty)
*
* // Collections / 集合
* isEmpty([]) // true
* isEmpty([1, 2, 3]) // false
* isEmpty({}) // true
* isEmpty({ key: 'value' }) // false
*
* // Built-in objects / 内置对象
* isEmpty(new Map()) // true
* isEmpty(new Map([['key', 'value']])) // false
* isEmpty(new Set()) // true
* isEmpty(new Set([1, 2, 3])) // false
*
* // Array-like objects / 类数组对象
* isEmpty(arguments) // true (if arguments is empty)
* isEmpty({ length: 0 }) // true
* isEmpty({ length: 1, 0: 'item' }) // false
* ```
*
* @since 1.0.0
*/
declare const isEmpty: (value: any) => boolean;
export default isEmpty;
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