JS工具函数汇总

一、操作URL

（1）获取query

function getQueryObject(url) {
    url = url == null ? window.location.href : url
    if (!url.includes('?')) return {}
    let search = url.substring(url.lastIndexOf('?') + 1)
    if(url.includes('#')){
        search = search.substring(0, search.lastIndexOf('#'))
    }
    const obj = {}
    const reg = /([^?&=]+)=([^?&=]*)/g
    search.replace(reg, (rs, $1, $2) => {
        const name = decodeURIComponent($1)
        let val = decodeURIComponent($2)
        val = String(val)
        obj[name] = val
        return rs
    })
    return obj
}

（2）获取hash

function getQueryObject(url) {
    url = url == null ? window.location.href : url
   
    let hash = url.substring(url.lastIndexOf('#') + 1)
    const obj = {}
    const reg = /([^?&=]+)=([^?&=]*)/g
    hash.replace(reg, (rs, $1, $2) => {
        const name = decodeURIComponent($1)
        let val = decodeURIComponent($2)
        val = String(val)
        obj[name] = val
        return rs
    })
    return obj
}

二、操作ClassName

（1）判断节点是否有className

function hasClass(ele, cls) {
  return !!ele.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'))
}

（2）添加className

function addClass(ele, cls) {
  if (!hasClass(ele, cls)) ele.className += ' ' + cls
}

（3）删除className

function removeClass(ele, cls) {
  if (hasClass(ele, cls)) {
    const reg = new RegExp('(\\s|^)' + cls + '(\\s|$)')
    ele.className = ele.className.replace(reg, ' ')
  }
}

（4）切换className

function toggleClass(element, className) {
    if (!element || !className) {
        return
    }
    let classString = element.className
    const nameIndex = classString.indexOf(className)
    if (nameIndex === -1) {
        classString += ' ' + className
    } else {
        classString =
            classString.substr(0, nameIndex) +
            classString.substr(nameIndex + className.length)
    }
    element.className = classString
}

三、字符串操作

（1）生成随机字符串

export const randomString = (len) => {
    let chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz123456789';
    let strLen = chars.length;
    let randomStr = '';
    for (let i = 0; i < len; i++) {
        randomStr += chars.charAt(Math.floor(Math.random() * strLen));
    }
    return randomStr;
};

（2）首字母大写

function capitalize(str) {
    return str.charAt(0).toUpperCase() + str.slice(1)
}

（3）手机号中间四位变成*

const telFormat = (tel) => {
   tel = String(tel); 
    return tel.substr(0,3) + "****" + tel.substr(7);
};

（4）下划转驼峰

function camelCase(str) {
  return str.replace(/_[a-z]/g, str1 => str1.substr(-1).toUpperCase())
}

（5）驼峰命名转横线命名

let hyphenateRE = /\B([A-Z])/g;
function hyphenate(str){
    return str.replace(hyphenateRE, '-$1').toLowerCase()
}
//abCd ==> ab-cd

（6）全角转换为半角

const toCDB = (str) => {
  let result = "";
  for (let i = 0; i < str.length; i++) {
    code = str.charCodeAt(i);
    if (code >= 65281 && code <= 65374) {
      result += String.fromCharCode(str.charCodeAt(i) - 65248);
    } else if (code == 12288) {
      result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);
    } else {
      result += str.charAt(i);
    }
  }
  return result;
}

（7）半角转换为全角

export const toDBC = (str) => {
  let result = "";
  for (let i = 0; i < str.length; i++) {
    code = str.charCodeAt(i);
    if (code >= 33 && code <= 126) {
      result += String.fromCharCode(str.charCodeAt(i) + 65248);
    } else if (code == 32) {
      result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32);
    } else {
      result += str.charAt(i);
    }
  }
  return result;
}

四、格式转换

（1）数字转化为大写金额

export const digitUppercase = (n) => {
    const fraction = ['角', '分'];
    const digit = [
        '零', '壹', '贰', '叁', '肆',
        '伍', '陆', '柒', '捌', '玖'
    ];
    const unit = [
        ['元', '万', '亿'],
        ['', '拾', '佰', '仟']
    ];
    n = Math.abs(n);
    let s = '';
    for (let i = 0; i < fraction.length; i++) {
        s += (digit[Math.floor(n * 10 * Math.pow(10, i)) % 10] + fraction[i]).replace(/零./, '');
    }
    s = s || '整';
    n = Math.floor(n);
    for (let i = 0; i < unit[0].length && n > 0; i++) {
        let p = '';
        for (let j = 0; j < unit[1].length && n > 0; j++) {
            p = digit[n % 10] + unit[1][j] + p;
            n = Math.floor(n / 10);
        }
        s = p.replace(/(零.)*零$/, '').replace(/^$/, '零') + unit[0][i] + s;
    }
    return s.replace(/(零.)*零元/, '元')
        .replace(/(零.)+/g, '零')
        .replace(/^整$/, '零元整');
};

（2）数字转化为中文数字

export const intToChinese = (value) => {
 const str = String(value);
 const len = str.length-1;
 const idxs = ['','十','百','千','万','十','百','千','亿','十','百','千','万','十','百','千','亿'];
 const num = ['零','一','二','三','四','五','六','七','八','九'];
 return str.replace(/([1-9]|0+)/g, ( $, $1, idx, full) => {
    let pos = 0;
    if($1[0] !== '0'){
      pos = len-idx;
      if(idx == 0 && $1[0] == 1 && idxs[len-idx] == '十'){
        return idxs[len-idx];
      }
      return num[$1[0]] + idxs[len-idx];
    } else {
      let left = len - idx;
      let right = len - idx + $1.length;
      if(Math.floor(right / 4) - Math.floor(left / 4) > 0){
        pos = left - left % 4;
      }
      if( pos ){
        return idxs[pos] + num[$1[0]];
      } else if( idx + $1.length >= len ){
        return '';
      }else {
        return num[$1[0]]
      }
    }
   });
}

五、event事件

（1）禁止某些键盘事件

document.addEventListener('keydown', function(event) {
    return !(
        112 == event.keyCode ||        //禁止F1
        123 == event.keyCode ||        //禁止F12
        event.ctrlKey && 82 == event.keyCode ||        //禁止ctrl+R
        event.ctrlKey && 18 == event.keyCode ||        //禁止ctrl+N
        event.shiftKey && 121 == event.keyCode ||          //禁止shift+F10
        event.altKey && 115 == event.keyCode ||        //禁止alt+F4
        "A" == event.srcElement.tagName && event.shiftKey        //禁止shift+点击a标签
    ) || （event.returnValue = false）
});

（2）禁止右键、选择、复制

['contextmenu', 'selectstart', 'copy'].forEach(function(ev) {
    document.addEventListener(ev, function(event) {
        return event.returnValue = false;
    })
});

六、数组操作

（1）数组乱序

export const arrScrambling = (arr) => {
    for (let i = 0; i < arr.length; i++) {
      const randomIndex = Math.round(Math.random() * (arr.length - 1 - i)) + i;
      [arr[i], arr[randomIndex]] = [arr[randomIndex], arr[i]];
    }
    return arr;
}

（2）数组扁平化

export const flatten = (arr) => {
  let result = [];
  for(let i = 0; i < arr.length; i++) {
    if(Array.isArray(arr[i])) {
      result = result.concat(flatten(arr[i]));
    } else {
      result.push(arr[i]);
    }
  }
  return result;
}

（3）数组中获取随机数

export const sample = arr => arr[Math.floor(Math.random() * arr.length)];

（4）生成指定范围随机数

export const randomNum = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min;

（5）数组去重

function uniqueArr(arr) {
  return Array.from(new Set(arr))
}

（6）数据合并

export function mergeRecursive(source, target) {
  for (var p in target) {
    try {
      if (target[p].constructor == Object) {
        source[p] = mergeRecursive(source[p], target[p]);
      } else {
        source[p] = target[p];
      }
    } catch (e) {
      source[p] = target[p];
    }
  }
  return source;
};

（7）repeat：生成一个重复的字符串，有n个str组成，可修改为填充为数组等

function repeat(str, n) {
    let res = '';
    while(n) {
        if(n % 2 === 1) {
            res += str;
        }
        if(n > 1) {
            str += str;
        }
        n >>= 1;
    }
    return res
};
//repeat('123',3) ==> 123123123

七、cookie操作

（1）设置cookie

export const setCookie = (key, value, expire) => {
    const d = new Date();
    d.setDate(d.getDate() + expire);
    document.cookie = `${key}=${value};expires=${d.toUTCString()}`
};

（2）读取cookie

export const getCookie = (key) => {
    const cookieStr = unescape(document.cookie);
       const arr = cookieStr.split('; ');
       let cookieValue = '';
       for (let i = 0; i < arr.length; i++) {
           const temp = arr[i].split('=');
           if (temp[0] === key) {
               cookieValue = temp[1];
               break
       }
    }
    return cookieValue
};

（3）删除cookie

export const delCookie = (key) => {
    document.cookie = `${encodeURIComponent(key)}=;expires=${new Date()}`
};

八、校验

（1）校验身份证号码

export const checkCardNo = (value) => {
    let reg = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/;
    return reg.test(value);
};

（2）校验是否包含中文

export const haveCNChars => (value) => {
    return /[\u4e00-\u9fa5]/.test(value);
}

（3）验证邮箱

export const isEmail = (value) {
    return /^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/.test(value);
}

（4）校验是否包含emoji表情

export const isEmojiCharacter = (value) => {
   value = String(value);
    for (let i = 0; i < value.length; i++) {
        const hs = value.charCodeAt(i);
        if (0xd800 <= hs && hs <= 0xdbff) {
            if (value.length > 1) {
                const ls = value.charCodeAt(i + 1);
                const uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
                if (0x1d000 <= uc && uc <= 0x1f77f) {
                    return true;
                }
            }
        } else if (value.length > 1) {
            const ls = value.charCodeAt(i + 1);
            if (ls == 0x20e3) {
                return true;
            }
        } else {
            if (0x2100 <= hs && hs <= 0x27ff) {
                return true;
            } else if (0x2B05 <= hs && hs <= 0x2b07) {
                return true;
            } else if (0x2934 <= hs && hs <= 0x2935) {
                return true;
            } else if (0x3297 <= hs && hs <= 0x3299) {
                return true;
            } else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030
                    || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b
                    || hs == 0x2b50) {
                return true;
            }
        }
    }
   return false;
}

（5）检测URL是否有效

export const getUrlState = (URL) => {
  let xmlhttp = new ActiveXObject("microsoft.xmlhttp");
  xmlhttp.Open("GET", URL, false);
  try {
    xmlhttp.Send();
  } catch (e) {
  } finally {
    let result = xmlhttp.responseText;
    if (result) {
      if (xmlhttp.Status == 200) {
        return true;
      } else {
        return false;
      }
    } else {
      return false;
    }
  }
}

（6）验证小写

function validLowerCase(str) {
  const reg = /^[a-z]+$/
  return reg.test(str)
}

（7）验证是否为字符串

function isString(str) {
  if (typeof str === 'string' || str instanceof String) {
    return true
  }
  return false
}

九、设备判断

（1）判断是移动还是PC设备

export const isMobile = () => {
  if ((navigator.userAgent.match(/(iPhone|iPod|Android|ios|iOS|iPad|Backerry|WebOS|Symbian|Windows Phone|Phone)/i))) {
  return 'mobile';
  }
  return 'desktop';
}

（2）判断是否是苹果还是安卓移动设备

export const isAppleMobileDevice = () => {
  let reg = /iphone|ipod|ipad|Macintosh/i;
  return reg.test(navigator.userAgent.toLowerCase());
}

（3）判断是否是安卓移动设备

export const isAndroidMobileDevice = () => {
  return /android/i.test(navigator.userAgent.toLowerCase());
}

（4）判断是Windows还是Mac系统

export const osType = () => {
    const agent = navigator.userAgent.toLowerCase();
    const isMac = /macintosh|mac os x/i.test(navigator.userAgent);
   const isWindows = agent.indexOf("win64") >= 0 || agent.indexOf("wow64") >= 0 || agent.indexOf("win32") >= 0 || agent.indexOf("wow32") >= 0;
    if (isWindows) {
        return "windows";
    }
    if(isMac){
        return "mac";
    }
}

（5）判断是否是微信/QQ内置浏览器

export const broswer = () => {
    const ua = navigator.userAgent.toLowerCase();
    if (ua.match(/MicroMessenger/i) == "micromessenger") {
        return "weixin";
    } else if (ua.match(/QQ/i) == "qq") {
        return "QQ";
    }
    return false;
}

（6）浏览器型号和版本

export const getExplorerInfo = () => {
    let t = navigator.userAgent.toLowerCase();
    return 0 <= t.indexOf("msie") ? { //ie < 11
        type: "IE",
        version: Number(t.match(/msie ([\d]+)/)[1])
    } : !!t.match(/trident\/.+?rv:(([\d.]+))/) ? { // ie 11
        type: "IE",
        version: 11
    } : 0 <= t.indexOf("edge") ? {
        type: "Edge",
        version: Number(t.match(/edge\/([\d]+)/)[1])
    } : 0 <= t.indexOf("firefox") ? {
        type: "Firefox",
        version: Number(t.match(/firefox\/([\d]+)/)[1])
    } : 0 <= t.indexOf("chrome") ? {
        type: "Chrome",
        version: Number(t.match(/chrome\/([\d]+)/)[1])
    } : 0 <= t.indexOf("opera") ? {
        type: "Opera",
        version: Number(t.match(/opera.([\d]+)/)[1])
    } : 0 <= t.indexOf("Safari") ? {
        type: "Safari",
        version: Number(t.match(/version\/([\d]+)/)[1])
    } : {
        type: t,
        version: -1
    }
}

（7）识别各种浏览器及平台

//运行环境是浏览器
let inBrowser = typeof window !== 'undefined';
//运行环境是微信
let inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
let weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
//浏览器 UA 判断
let UA = inBrowser && window.navigator.userAgent.toLowerCase();
let isIE = UA && /msie|trident/.test(UA);
let isIE9 = UA && UA.indexOf('msie 9.0') > 0;
let isEdge = UA && UA.indexOf('edge/') > 0;
let isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
let isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
let isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge; 

（8）getExplorerInfo：获取浏览器信息

function getExplorerInfo() {
    let t = navigator.userAgent.toLowerCase();
    return 0 <= t.indexOf("msie") ? { //ie < 11
        type: "IE",
        version: Number(t.match(/msie ([\d]+)/)[1])
    } : !!t.match(/trident\/.+?rv:(([\d.]+))/) ? { // ie 11
        type: "IE",
        version: 11
    } : 0 <= t.indexOf("edge") ? {
        type: "Edge",
        version: Number(t.match(/edge\/([\d]+)/)[1])
    } : 0 <= t.indexOf("firefox") ? {
        type: "Firefox",
        version: Number(t.match(/firefox\/([\d]+)/)[1])
    } : 0 <= t.indexOf("chrome") ? {
        type: "Chrome",
        version: Number(t.match(/chrome\/([\d]+)/)[1])
    } : 0 <= t.indexOf("opera") ? {
        type: "Opera",
        version: Number(t.match(/opera.([\d]+)/)[1])
    } : 0 <= t.indexOf("Safari") ? {
        type: "Safari",
        version: Number(t.match(/version\/([\d]+)/)[1])
    } : {
        type: t,
        version: -1
    }
} 

（9）isPCBroswer：检测是否为PC端浏览器模式

function isPCBroswer() {
    let e = navigator.userAgent.toLowerCase()
        , t = "ipad" == e.match(/ipad/i)
        , i = "iphone" == e.match(/iphone/i)
        , r = "midp" == e.match(/midp/i)
        , n = "rv:1.2.3.4" == e.match(/rv:1.2.3.4/i)
        , a = "ucweb" == e.match(/ucweb/i)
        , o = "android" == e.match(/android/i)
        , s = "windows ce" == e.match(/windows ce/i)
        , l = "windows mobile" == e.match(/windows mobile/i);
    return !(t || i || r || n || a || o || s || l)
} 

十、浏览器操作

（1）滚动到页面顶部

export const scrollToTop = () => {
  const height = document.documentElement.scrollTop || document.body.scrollTop;
  if (height > 0) {
    window.requestAnimationFrame(scrollToTop);
    window.scrollTo(0, height - height / 8);
  }
}

（2）滚动到页面底部

export const scrollToBottom = () => {
  window.scrollTo(0, document.documentElement.clientHeight);  
}

（3）滚动到指定元素区域

export const smoothScroll = (element) => {
    document.querySelector(element).scrollIntoView({
        behavior: 'smooth'
    });
};

（4）获取可视窗口高度

export const getClientHeight = () => {
    let clientHeight = 0;
    if (document.body.clientHeight && document.documentElement.clientHeight) {
        clientHeight = (document.body.clientHeight < document.documentElement.clientHeight) ? document.body.clientHeight : document.documentElement.clientHeight;
    }
    else {
        clientHeight = (document.body.clientHeight > document.documentElement.clientHeight) ? document.body.clientHeight : document.documentElement.clientHeight;
    }
    return clientHeight;
}

（5）获取可视窗口宽度

export const getPageViewWidth = () => {
    return (document.compatMode == "BackCompat" ? document.body : document.documentElement).clientWidth;
}

（6）打开浏览器全屏

export const toFullScreen = () => {
    let element = document.body;
    if (element.requestFullscreen) {
      element.requestFullscreen()
    } else if (element.mozRequestFullScreen) {
      element.mozRequestFullScreen()
    } else if (element.msRequestFullscreen) {
      element.msRequestFullscreen()
    } else if (element.webkitRequestFullscreen) {
      element.webkitRequestFullScreen()
    }
}

（7）退出浏览器全屏

export const exitFullscreen = () => {
    if (document.exitFullscreen) {
      document.exitFullscreen()
    } else if (document.msExitFullscreen) {
      document.msExitFullscreen()
    } else if (document.mozCancelFullScreen) {
      document.mozCancelFullScreen()
    } else if (document.webkitExitFullscreen) {
      document.webkitExitFullscreen()
    }
}

十一、时间操作

（1）当前(或指定)时间

function formatDate(time = '') {
    let date = time ? new Date(time) : new Date();
    var year = date.getFullYear()
    var month = date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1
    var day = date.getDate() < 10 ? '0' + date.getDate() : date.getDate()
    var hours = date.getHours() < 10 ? '0' + date.getHours() : date.getHours()
    var minutes = date.getMinutes() < 10 ? '0' + date.getMinutes() : date.getMinutes()
    var seconds = date.getSeconds() < 10 ? '0' + date.getSeconds() : date.getSeconds()
    return year + '-' + month + '-' + day + ' ' + hours + ':' + minutes + ':' + seconds
}

（2）根据参数格式将时间对象转换为字符串

function parseTime(time, pattern) {
  if (arguments.length === 0 || !time) {
    return null
  }
  const format = pattern || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string') && (/^[0-9]+$/.test(time))) {
      time = parseInt(time)
    } else if (typeof time === 'string') {
      time = time.replace(new RegExp(/-/gm), '/').replace('T', ' ').replace(new RegExp(/\.[\d]{3}/gm), '');
    }
    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value] }
    if (result.length > 0 && value < 10) {
      value = '0' + value
    }
    return value || 0
  })
  return time_str
}

（3）时间对比

function formatTime(time, option) {
  if (('' + time).length === 10) {
    time = parseInt(time) * 1000
  } else {
    time = +time
  }
  const d = new Date(time)
  const now = Date.now()

  const diff = (now - d) / 1000

  if (diff < 30) {
    return '刚刚'
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + '分钟前'
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + '小时前'
  } else if (diff < 3600 * 24 * 2) {
    return '1天前'
  }
  if (option) {
    return parseTime(time, option)
  } else {
    return (
      d.getMonth() +
      1 +
      '月' +
      d.getDate() +
      '日' +
      d.getHours() +
      '时' +
      d.getMinutes() +
      '分'
    )
  }
}

十二、JavaScript操作

（1）阻止冒泡事件

export const stopPropagation = (e) => { 
    e = e || window.event; 
    if(e.stopPropagation) {    // W3C阻止冒泡方法 
        e.stopPropagation(); 
    } else { 
        e.cancelBubble = true; // IE阻止冒泡方法 
    } 
} 

（2）防抖函数

//非立即执行版本
function debounce(func, wait) {
    let timeout;
    return function () {
        let context = this;
        let args = arguments;

        if (timeout) clearTimeout(timeout);
        
        timeout = setTimeout(() => {
            func.apply(context, args)
        }, wait);
    }
}
//立即执行版本
function debounce(func,wait) {
    let timeout;
    return function () {
        let context = this;
        let args = arguments;

        if (timeout) clearTimeout(timeout);

        let callNow = !timeout;
        timeout = setTimeout(() => {
            timeout = null;
        }, wait)

        if (callNow) func.apply(context, args)
    }
}

（3）节流函数

//时间戳   立即执行版本
function throttle(func, wait) {
    let previous = 0;
    return function() {
        let now = Date.now();
        let context = this;
        let args = arguments;
        if (now - previous > wait) {
            func.apply(context, args);
            previous = now;
        }
    }
}
//定时器 非立即执行版本
function throttle(func, wait) {
    let timeout;
    return function() {
        let context = this;
        let args = arguments;
        if (!timeout) {
            timeout = setTimeout(() => {
                timeout = null;
                func.apply(context, args)
            }, wait)
        } 
    }
}

（4）对象深拷贝

function deepClone(source) {
  if (!source && typeof source !== 'object') {
    throw new Error('error arguments', 'deepClone')
  }
  const targetObj = source.constructor === Array ? [] : {}
  Object.keys(source).forEach(keys => {
    if (source[keys] && typeof source[keys] === 'object') {
      targetObj[keys] = deepClone(source[keys])
    } else {
      targetObj[keys] = source[keys]
    }
  })
  return targetObj
}

（5）判断两个复杂数据类型是否相等

  function patchData(newValue, oldValue) {
    const newType = Object.prototype.toString.call(newValue);
    const oldType = Object.prototype.toString.call(oldValue);
    if (newType !== oldType) return false;
    if (typeof newValue !== "object") {
      return newValue === oldValue;
    } else {
      return isEqual(newValue, oldValue);
    }
  }
  
  function isEqual(newValue, oldValue) {
    if (newValue === oldValue) {
      return true;
    }
    const obj1Keys = Object.keys(newValue);
    const obj2Keys = Object.keys(oldValue);

    if (obj1Keys.length !== obj2Keys.length) {
      return false;
    }

    for (let key of obj1Keys) {
      if (typeof newValue[key] === "object") {
        if (!this.isEqual(newValue[key], oldValue[key])) {
          return false;
        }
      } else {
        if (newValue[key] !== oldValue[key]) {
          return false;
        }
      }
    }
    return true;
  }

（6）生成uuid

function uuid() {
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
        var r = Math.random() * 16 | 0,
            v = c == 'x' ? r : (r & 0x3 | 0x8);
        return v.toString(16);
    });
}

十三、文件下载

（1）downloadFile：base64数据导出文件，文件下载

function downloadFile(filename, data) {
    let DownloadLink = document.createElement('a');
    if (DownloadLink) {
        document.body.appendChild(DownloadLink);
        DownloadLink.style = 'display: none';
        DownloadLink.download = filename;
        DownloadLink.href = data;
        if (document.createEvent) {
            let DownloadEvt = document.createEvent('MouseEvents');
            DownloadEvt.initEvent('click', true, false);
            DownloadLink.dispatchEvent(DownloadEvt);
        } else if (document.createEventObject) {
            DownloadLink.fireEvent('onclick');
        } else if (typeof DownloadLink.onclick == 'function') {
            DownloadLink.onclick();
        }
        document.body.removeChild(DownloadLink);
    }
} 

十四、定时器

（1）requestAnimationFrame：window动画

window.requestAnimationFrame = window.requestAnimationFrame ||
    window.webkitRequestAnimationFrame ||
    window.mozRequestAnimationFrame ||
    window.msRequestAnimationFrame ||
    window.oRequestAnimationFrame ||
    function (callback) {
        //为了使setTimteout的尽可能的接近每秒60帧的效果
        window.setTimeout(callback, 1000 / 60);
    }
window.cancelAnimationFrame = window.cancelAnimationFrame ||
    window.webkitCancelAnimationFrame ||
    window.mozCancelAnimationFrame ||
    window.msCancelAnimationFrame ||
    window.oCancelAnimationFrame ||
    function (id) {
        //为了使setTimteout的尽可能的接近每秒60帧的效果
        window.clearTimeout(id);
    }