_.isWeakMap(value)

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_.isWeakMap(value)

_.isWeakMap判断一个值是否被归类为WeakMap对象

参数

value (*): 需要检查的值

返回值

(boolean): 如果是WeakMap对象返回true，否则false

例子

_.isWeakMap(new WeakMap);
// => true
 
_.isWeakMap(new Map);
// => false

源代码

import getTag from './.internal/getTag.js'
import isObjectLike from './isObjectLike'

/**
 * Checks if `value` is classified as a `WeakMap` object.
 *
 * @since 4.3.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
 * @example
 *
 * isWeakMap(new WeakMap)
 * // => true
 *
 * isWeakMap(new Map)
 * // => false
 */
//判断一个值是否被归类为WeakMap对象
function isWeakMap(value) {
  return isObjectLike(value) && getTag(value) == '[object WeakMap]'
  //判断是否是object-like对象和toStringTag
}

export default isWeakMap