@fruits-chain/react-native-xiaoshu/src/helpers/typeof.ts

React Native UI library

const isType =
  (
    t:
      | 'Array'
      | 'Object'
      | 'Function'
      | 'String'
      | 'Number'
      | 'Null'
      | 'Undefined',
  ) =>
  (v: any) =>
    Object.prototype.toString.call(v) === `[object ${t}]`

/** 已经声明/定义的数据 */
export function isDef<T>(val: T): val is NonNullable<T> {
  return val !== undefined && val !== null
}

/** 是数组 */
export const isArray = <T>(v: T[]): v is T[] => isType('Array')(v)

/** 是对象 */
export const isObject = <T>(v: T): v is T => isType('Object')(v)

/** 是函数 */
export const isFunction = (v: any): v is Function => isType('Function')(v)

/** 是一个 Promise */
export const isPromise = <T = any>(val: any): val is Promise<T> => {
  return isObject(val) && isFunction(val.then) && isFunction(val.catch)
}

/** 是手机号码 */
export function isMobile(value: string): boolean {
  value = value.replace(/[^-|\d]/g, '')
  return (
    /^((\+86)|(86))?(1)\d{10}$/.test(value) || /^0[0-9-]{10,13}$/.test(value)
  )
}

/** 是空 */
export function isNullish(value: any) {
  return ['', undefined, null].includes(value)
}

/**
 * 是否是 value 类型
 * @description 在业务中，null 可以是一个 value 值
 */
export function isValue<T>(val: T): val is T extends undefined ? never : T {
  return val !== undefined
}