element-plus/packages/utils/types.ts

import { isArray, isObject } from '@vue/shared'

export {
  isArray,
  isFunction,
  isObject,
  isString,
  isDate,
  isPromise,
  isSymbol,
} from '@vue/shared'
export { isBoolean, isNumber } from '@vueuse/core'
export { isVNode } from 'vue'

export const isUndefined = (val: any): val is undefined => val === undefined

export const isEmpty = (val: unknown) =>
  (!val && val !== 0) ||
  (isArray(val) && val.length === 0) ||
  (isObject(val) && !Object.keys(val).length)