_.isNil(value)

148

_.isNil(value)

_.isNil判斷一個值是否是null或者undefined

參數

value (*): 需要檢查的值

返回值

(boolean): 如果是null或undefined返回true，否則false

例子

_.isNil(null);
// => true
 
_.isNil(void 0);
// => true
 
_.isNil(NaN);
// => false

源代碼

/**
 * Checks if `value` is `null` or `undefined`.
 *
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
 * @example
 *
 * isNil(null)
 * // => true
 *
 * isNil(void 0)
 * // => true
 *
 * isNil(NaN)
 * // => false
 */
//判斷一個值是否是null或者undefined
function isNil(value) {
  return value == null
}

export default isNil