yy-dev7

const surveyMachine = Machine({
  id: 'survey',

  initial: 'index',

  states: {
    index: {
      on: {
        VERIFICATION_ACTIVE: 'verification',
        VERIFICATION_INACTIVE: 'start',

yy-dev7

//正整数
/^[0-9]*[1-9][0-9]*$/;

//负整数
/^-[0-9]*[1-9][0-9]*$/;

//正浮点数
/^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;

//负浮点数

yy-dev7

function transformRMB(tranvalue) {
  //拆分整数与小数
  var splits = function(tranvalue) {
    var value = new Array('', '');
    temp = tranvalue.toString().split(".");
    for (var i = 0; i < temp.length; i++) {
      value = temp;
    }
    return value;
  };

yy-dev7

/*
1、< 60s, 显示为“刚刚”
2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”
3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”
4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”
5、>= 1year, 显示具体日期“XXXX年XX月XX日 XX:XX”
*/
function timeFormat(time) {
  var date = new Date(time),
    curDate = new Date(),

yy-dev7

function deepClone() {
  let copy

  // 处理3个简单的类型, null 或者 undefined
  if (obj === null || typeof obj !== 'object') {
    return obj
  }

  if (obj instanceof Date) {
    copy = new Date()

yy-dev7

function throttle(fn, delay = 200) {
  let now
  let lastExec
  let timer
  let context
  let args

  const execute = () => {
    fn.apply(context, args)
    lastExec = now

yy-dev7

class Storage {
  constructor(strategy = 'internal') {
    this.strategy = strategy
  }

  /**
   * @param {string} key
   * @param {any} val
   * @param {number} maxAge 存储时间：ms
   */

yy-dev7

/**
 * 获取URL参数
 * // http://jsfiddle.net/draft/?foo=foo&bar=bar
    console.log(getUrlParams('foo')); // "foo"
    console.log(getUrlParams()); // {foo: "foo", bar: "bar"}
 */
function getUrlParams(name, uri) {
  const params = {}
  const search = uri || window.location.search

yy-dev7

window.requestAnimFrame = (function requestAnimFrame() {
  return window.requestAnimationFrame ||
    window.webkitRequestAnimationFrame ||
    window.mozRequestAnimationFrame ||
    function simulation(callback) {
      window.setTimeout(callback, 1000 / 60)
    }
}())

function scrollToY(scrollTargetY = 0, speed = 2000, easing = 'easeOutSine') {

yy-dev7

function optionalChaining(obj, chain) {
  return chain
    .split('.')
    .reduce(function(acc, val) {
      return acc ? acc[val] : undefined;
    }, obj);
}
var user = { address: { street: 'No.969 West WenYi Road', }, a: { b: { c: 2 } }, }
var ret = optionalChaining(user, 'address');
console.log(ret)