前端在日常开发中会用到许多的工具方法以及因功能而异封装的组件。
整合一起利于以后的使用，对团队的基础工作也有一定帮助。
下面只是一部分内容，由于内容太多边幅过长，剩下的有兴趣可以看下面链接：

Github部署：https://www.jianshu.com/p/6dc262104509
项目地址：https://github.com/haoyinag/AngsiUUI
一键到达：https://haoyinag.github.io/AngsiUUI/

值类型

邮箱

const isEmail = (s: string) => {
  return /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((.[a-zA-Z0-9_-]{2,3}){1,2})$/.test(
    s,
  );
};

手机号码

export const isMobile = s => {
  return /^1[0-9]{10}$/.test(s);
};

电话号码

export const isPhone = s => {
  return /^([0-9]{3,4}-)?[0-9]{7,8}$/.test(s);
};

是否 url 地址

export const isURL = s => {
  return /^http[s]?:\/\/.*/.test(s);
};

是否字符串

export const isString = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'String';
};

是否数字

export const isNumber = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'Number';
};

是否 boolean

export const isBoolean = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'Boolean';
};

是否函数

export const isFunction = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'Function';
};

是否为 null

export const isNull = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'Null';
};

是否 undefined

export const isUndefined = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'Undefined';
};

是否对象

export const isObj = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'Object';
};

是否数组

export const isArray = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'Array';
};

是否时间

export const isDate = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'Date';
};

是否正则

export const isRegExp = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'RegExp';
};

是否错误对象

export const isError = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'Error';
};

是否 Symbol 函数

export const isSymbol = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'Symbol';
};

是否 Promise 对象

export const isPromise = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'Promise';
};

是否 Set 对象

export const isSet = o => {
  return Object.prototype.toString.call(o).slice(8, -1) === 'Set';
};

检测密码强度

export const checkPwd = str => {
  var Lv = 0;
  if (str.length < 6) {
    return Lv;
  }
  if (/[0-9]/.test(str)) {
    Lv++;
  }
  if (/[a-z]/.test(str)) {
    Lv++;
  }
  if (/[A-Z]/.test(str)) {
    Lv++;
  }
  if (/[\.|-|_]/.test(str)) {
    Lv++;
  }
  return Lv;
};

判断类型集合

export const checkStr = (str, type) => {
  switch (type) {
    case 'phone': //手机号码
      return /^1[3|4|5|6|7|8|9][0-9]{9}$/.test(str);
    case 'tel': //座机
      return /^(0\d{2,3}-\d{7,8})(-\d{1,4})?$/.test(str);
    case 'card': //身份证
      return /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/.test(str);
    case 'pwd': //密码以字母开头，长度在6~18之间，只能包含字母、数字和下划线
      return /^[a-zA-Z]\w{5,17}$/.test(str);
    case 'postal': //邮政编码
      return /[1-9]\d{5}(?!\d)/.test(str);
    case 'QQ': //QQ号
      return /^[1-9][0-9]{4,9}$/.test(str);
    case 'email': //邮箱
      return /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/.test(str);
    case 'money': //金额(小数点2位)
      return /^\d*(?:\.\d{0,2})?$/.test(str);
    case 'URL': //网址
      return /(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?/.test(
        str,
      );
    case 'IP': //IP
      return /((?:(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d)\\.){3}(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d))/.test(
        str,
      );
    case 'date': //日期时间
      return (
        /^(\d{4})\-(\d{2})\-(\d{2}) (\d{2})(?:\:\d{2}|:(\d{2}):(\d{2}))$/.test(
          str,
        ) || /^(\d{4})\-(\d{2})\-(\d{2})$/.test(str)
      );
    case 'number': //数字
      return /^[0-9]$/.test(str);
    case 'english': //英文
      return /^[a-zA-Z]+$/.test(str);
    case 'chinese': //中文
      return /^[\\u4E00-\\u9FA5]+$/.test(str);
    case 'lower': //小写
      return /^[a-z]+$/.test(str);
    case 'upper': //大写
      return /^[A-Z]+$/.test(str);
    case 'HTML': //HTML标记
      return /<("[^"]*"|'[^']*'|[^'">])*>/.test(str);
    default:
      return true;
  }
};

严格的身份证校验

export const isCardID = sId => {
  if (!/(^\d{15}$)|(^\d{17}(\d|X|x)$)/.test(sId)) {
    console.log('你输入的身份证长度或格式错误');
    return false;
  }
  //身份证城市
  var aCity = {
    11: '北京',
    12: '天津',
    13: '河北',
    14: '山西',
    15: '内蒙古',
    21: '辽宁',
    22: '吉林',
    23: '黑龙江',
    31: '上海',
    32: '江苏',
    33: '浙江',
    34: '安徽',
    35: '福建',
    36: '江西',
    37: '山东',
    41: '河南',
    42: '湖北',
    43: '湖南',
    44: '广东',
    45: '广西',
    46: '海南',
    50: '重庆',
    51: '四川',
    52: '贵州',
    53: '云南',
    54: '西藏',
    61: '陕西',
    62: '甘肃',
    63: '青海',
    64: '宁夏',
    65: '新疆',
    71: '台湾',
    81: '香港',
    82: '澳门',
    91: '国外',
  };
  if (!aCity[parseInt(sId.substr(0, 2))]) {
    console.log('你的身份证地区非法');
    return false;
  }

  // 出生日期验证
  var sBirthday = (
      sId.substr(6, 4) +
      '-' +
      Number(sId.substr(10, 2)) +
      '-' +
      Number(sId.substr(12, 2))
    ).replace(/-/g, '/'),
    d = new Date(sBirthday);
  if (
    sBirthday !=
    d.getFullYear() + '/' + (d.getMonth() + 1) + '/' + d.getDate()
  ) {
    console.log('身份证上的出生日期非法');
    return false;
  }

  // 身份证号码校验
  var sum = 0,
    weights = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2],
    codes = '10X98765432';
  for (var i = 0; i < sId.length - 1; i++) {
    sum += sId[i] * weights[i];
  }
  var last = codes[sum % 11]; //计算出来的最后一位身份证号码
  if (sId[sId.length - 1] != last) {
    console.log('你输入的身份证号非法');
    return false;
  }

  return true;
};

正则 Pattern

非特殊字符

const specialTextPattern = /^[\u4E00-\u9FA5A-Za-z0-9]+$/;

emoji 表情

const iconRule2 = /[\uD83C|\uD83D|\uD83E][\uDC00-\uDFFF][\u200D|\uFE0F]|[\uD83C|\uD83D|\uD83E][\uDC00-\uDFFF]|[0-9|*|#]\uFE0F\u20E3|[0-9|#]\u20E3|[\u203C-\u3299]\uFE0F\u200D|[\u203C-\u3299]\uFE0F|[\u2122-\u2B55]|\u303D|[\A9|\AE]\u3030|\uA9|\uAE|\u3030/gi;

年龄

const agePattern = /^([1-9]|[0-9]{2}|100)$/;

数字+英文

const numEnTextPattern = /^[0-9a-zA-Z]+$/;

数字+小数点

const numPotTextPattern = /^(\d|\.)+(\.\d+)?$/;

数字+2 位小数点

const numPot2TextPattern = /^(\d+)(.\d{0,2})?$/;

非 0 数字

const numPattern = /^\d{1,}$/;

英文

const enPattern = /^[a-zA-Z]+$/;

Email

const emailPattern = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((.[a-zA-Z0-9_-]{2,3}){1,2})$/;

手机号码

const mobilePattern = /^1[0-9]{10}$/;

数字操作

随机数范围

export const random = (min, max) => {
  if (arguments.length === 2) {
    return Math.floor(min + Math.random() * (max + 1 - min));
  } else {
    return null;
  }
};

将阿拉伯数字翻译成中文的大写数字

export const numberToChinese = num => {
  var AA = new Array(
    '零',
    '一',
    '二',
    '三',
    '四',
    '五',
    '六',
    '七',
    '八',
    '九',
    '十',
  );
  var BB = new Array('', '十', '百', '仟', '萬', '億', '点', '');
  var a = ('' + num).replace(/(^0*)/g, '').split('.'),
    k = 0,
    re = '';
  for (var i = a[0].length - 1; i >= 0; i--) {
    switch (k) {
      case 0:
        re = BB[7] + re;
        break;
      case 4:
        if (!new RegExp('0{4}//d{' + (a[0].length - i - 1) + '}$').test(a[0]))
          re = BB[4] + re;
        break;
      case 8:
        re = BB[5] + re;
        BB[7] = BB[5];
        k = 0;
        break;
    }
    if (k % 4 == 2 && a[0].charAt(i + 2) != 0 && a[0].charAt(i + 1) == 0)
      re = AA[0] + re;
    if (a[0].charAt(i) != 0) re = AA[a[0].charAt(i)] + BB[k % 4] + re;
    k++;
  }

  if (a.length > 1) {
    // 加上小数部分(如果有小数部分)
    re += BB[6];
    for (var i = 0; i < a[1].length; i++) re += AA[a[1].charAt(i)];
  }
  if (re == '一十') re = '十';
  if (re.match(/^一/) && re.length == 3) re = re.replace('一', '');
  return re;
};

将数字转换为大写金额

export const changeToChinese = Num => {
  //判断如果传递进来的不是字符的话转换为字符
  if (typeof Num == 'number') {
    Num = new String(Num);
  }
  Num = Num.replace(/,/g, ''); //替换tomoney()中的“,”
  Num = Num.replace(/ /g, ''); //替换tomoney()中的空格
  Num = Num.replace(/￥/g, ''); //替换掉可能出现的￥字符
  if (isNaN(Num)) {
    //验证输入的字符是否为数字
    //alert("请检查小写金额是否正确");
    return '';
  }
  //字符处理完毕后开始转换，采用前后两部分分别转换
  var part = String(Num).split('.');
  var newchar = '';
  //小数点前进行转化
  for (var i = part[0].length - 1; i >= 0; i--) {
    if (part[0].length > 10) {
      return '';
      //若数量超过拾亿单位，提示
    }
    var tmpnewchar = '';
    var perchar = part[0].charAt(i);
    switch (perchar) {
      case '0':
        tmpnewchar = '零' + tmpnewchar;
        break;
      case '1':
        tmpnewchar = '壹' + tmpnewchar;
        break;
      case '2':
        tmpnewchar = '贰' + tmpnewchar;
        break;
      case '3':
        tmpnewchar = '叁' + tmpnewchar;
        break;
      case '4':
        tmpnewchar = '肆' + tmpnewchar;
        break;
      case '5':
        tmpnewchar = '伍' + tmpnewchar;
        break;
      case '6':
        tmpnewchar = '陆' + tmpnewchar;
        break;
      case '7':
        tmpnewchar = '柒' + tmpnewchar;
        break;
      case '8':
        tmpnewchar = '捌' + tmpnewchar;
        break;
      case '9':
        tmpnewchar = '玖' + tmpnewchar;
        break;
    }
    switch (part[0].length - i - 1) {
      case 0:
        tmpnewchar = tmpnewchar + '元';
        break;
      case 1:
        if (perchar != 0) tmpnewchar = tmpnewchar + '拾';
        break;
      case 2:
        if (perchar != 0) tmpnewchar = tmpnewchar + '佰';
        break;
      case 3:
        if (perchar != 0) tmpnewchar = tmpnewchar + '仟';
        break;
      case 4:
        tmpnewchar = tmpnewchar + '万';
        break;
      case 5:
        if (perchar != 0) tmpnewchar = tmpnewchar + '拾';
        break;
      case 6:
        if (perchar != 0) tmpnewchar = tmpnewchar + '佰';
        break;
      case 7:
        if (perchar != 0) tmpnewchar = tmpnewchar + '仟';
        break;
      case 8:
        tmpnewchar = tmpnewchar + '亿';
        break;
      case 9:
        tmpnewchar = tmpnewchar + '拾';
        break;
    }
    var newchar = tmpnewchar + newchar;
  }
  //小数点之后进行转化
  if (Num.indexOf('.') != -1) {
    if (part[1].length > 2) {
      // alert("小数点之后只能保留两位,系统将自动截断");
      part[1] = part[1].substr(0, 2);
    }
    for (i = 0; i < part[1].length; i++) {
      tmpnewchar = '';
      perchar = part[1].charAt(i);
      switch (perchar) {
        case '0':
          tmpnewchar = '零' + tmpnewchar;
          break;
        case '1':
          tmpnewchar = '壹' + tmpnewchar;
          break;
        case '2':
          tmpnewchar = '贰' + tmpnewchar;
          break;
        case '3':
          tmpnewchar = '叁' + tmpnewchar;
          break;
        case '4':
          tmpnewchar = '肆' + tmpnewchar;
          break;
        case '5':
          tmpnewchar = '伍' + tmpnewchar;
          break;
        case '6':
          tmpnewchar = '陆' + tmpnewchar;
          break;
        case '7':
          tmpnewchar = '柒' + tmpnewchar;
          break;
        case '8':
          tmpnewchar = '捌' + tmpnewchar;
          break;
        case '9':
          tmpnewchar = '玖' + tmpnewchar;
          break;
      }
      if (i == 0) tmpnewchar = tmpnewchar + '角';
      if (i == 1) tmpnewchar = tmpnewchar + '分';
      newchar = newchar + tmpnewchar;
    }
  }
  //替换所有无用汉字
  while (newchar.search('零零') != -1) newchar = newchar.replace('零零', '零');
  newchar = newchar.replace('零亿', '亿');
  newchar = newchar.replace('亿万', '亿');
  newchar = newchar.replace('零万', '万');
  newchar = newchar.replace('零元', '元');
  newchar = newchar.replace('零角', '');
  newchar = newchar.replace('零分', '');
  if (newchar.charAt(newchar.length - 1) == '元') {
    newchar = newchar + '整';
  }
  return newchar;
};

字符串操作

去除空格,type: 1-所有空格 2-前后空格 3-前空格 4-后空格

export const trim = (str, type) => {
  type = type || 1;
  switch (type) {
    case 1:
      return str.replace(/\s+/g, '');
    case 2:
      return str.replace(/(^\s*)|(\s*$)/g, '');
    case 3:
      return str.replace(/(^\s*)/g, '');
    case 4:
      return str.replace(/(\s*$)/g, '');
    default:
      return str;
  }
};

字符转换，type: 1:首字母大写 2：首字母小写 3：大小写转换 4：全部大写 5：全部小写

export const changeCase = (str, type) => {
  type = type || 4;
  switch (type) {
    case 1:
      return str.replace(/\b\w+\b/g, function(word) {
        return (
          word.substring(0, 1).toUpperCase() + word.substring(1).toLowerCase()
        );
      });
    case 2:
      return str.replace(/\b\w+\b/g, function(word) {
        return (
          word.substring(0, 1).toLowerCase() + word.substring(1).toUpperCase()
        );
      });
    case 3:
      return str
        .split('')
        .map(function(word) {
          if (/[a-z]/.test(word)) {
            return word.toUpperCase();
          } else {
            return word.toLowerCase();
          }
        })
        .join('');
    case 4:
      return str.toUpperCase();
    case 5:
      return str.toLowerCase();
    default:
      return str;
  }
};

在字符串中插入新字符串

export const insertStr = (soure, index, newStr) => {
  var str = soure.slice(0, index) + newStr + soure.slice(index);
  return str;
};

复杂类型操作

数组排序，{type} 1：从小到大 2：从大到小 3：随机

export const sort = (arr, type = 1) => {
  return arr.sort((a, b) => {
    switch (type) {
      case 1:
        return a - b;
      case 2:
        return b - a;
      case 3:
        return Math.random() - 0.5;
      default:
        return arr;
    }
  });
};

去重

export const unique = arr => {
  if (Array.hasOwnProperty('from')) {
    return Array.from(new Set(arr));
  } else {
    var n = {},
      r = [];
    for (var i = 0; i < arr.length; i++) {
      if (!n[arr[i]]) {
        n[arr[i]] = true;
        r.push(arr[i]);
      }
    }
    return r;
  }
};

求两个集合的并集

export const union = (a, b) => {
  var newArr = a.concat(b);
  return this.unique(newArr);
};

求两个集合的交集

export const intersect = (a, b) => {
  var _this = this;
  a = this.unique(a);
  return this.map(a, function(o) {
    return _this.contains(b, o) ? o : null;
  });
};

删除其中一个元素

export const remove = (arr, ele) => {
  var index = arr.indexOf(ele);
  if (index > -1) {
    arr.splice(index, 1);
  }
  return arr;
};

将类数组转换为数组

export const formArray = ary => {
  var arr = [];
  if (Array.isArray(ary)) {
    arr = ary;
  } else {
    arr = Array.prototype.slice.call(ary);
  }
  return arr;
};

求和

export const sum = arr => {
  return arr.reduce((pre, cur) => {
    return pre + cur;
  });
};

平均值

export const average = arr => {
  return this.sum(arr) / arr.length;
};

判断两个对象是否键值相同

export const isObjectEqual = (a, b) => {
  var aProps = Object.getOwnPropertyNames(a);
  var bProps = Object.getOwnPropertyNames(b);

  if (aProps.length !== bProps.length) {
    return false;
  }

  for (var i = 0; i < aProps.length; i++) {
    var propName = aProps[i];

    if (a[propName] !== b[propName]) {
      return false;
    }
  }
  return true;
};

十六进制颜色转 RGBA 字符串

export const colorToRGB = (val, opa) => {
  var pattern = /^(#?)[a-fA-F0-9]{6}$/; //16进制颜色值校验规则
  var isOpa = typeof opa == 'number'; //判断是否有设置不透明度

  if (!pattern.test(val)) {
    //如果值不符合规则返回空字符
    return '';
  }

  var v = val.replace(/#/, ''); //如果有#号先去除#号
  var rgbArr = [];
  var rgbStr = '';

  for (var i = 0; i < 3; i++) {
    var item = v.substring(i * 2, i * 2 + 2);
    var num = parseInt(item, 16);
    rgbArr.push(num);
  }

  rgbStr = rgbArr.join();
  rgbStr =
    'rgb' + (isOpa ? 'a' : '') + '(' + rgbStr + (isOpa ? ',' + opa : '') + ')';
  return rgbStr;
};

端丨判断

是否是微信浏览器

export const ua = navigator.userAgent.toLowerCase();
export const isWeiXin = () => {
  return ua.match(/microMessenger/i) == 'micromessenger';
};

是否是移动端

export const isDeviceMobile = () => {
  return /android|webos|iphone|ipod|balckberry/i.test(ua);
};

是否是 QQ 浏览器

export const isQQBrowser = () => {
  return !!ua.match(/mqqbrowser|qzone|qqbrowser|qbwebviewtype/i);
};

是否是爬虫

export const isSpider = () => {
  return /adsbot|googlebot|bingbot|msnbot|yandexbot|baidubot|robot|careerbot|seznambot|bot|baiduspider|jikespider|symantecspider|scannerlwebcrawler|crawler|360spider|sosospider|sogou web sprider|sogou orion spider/.test(
    ua,
  );
};

是否 ios

export const isIos = () => {
  var u = navigator.userAgent;
  if (u.indexOf('Android') > -1 || u.indexOf('Linux') > -1) {
    //安卓手机
    return false;
  } else if (u.indexOf('iPhone') > -1) {
    //苹果手机
    return true;
  } else if (u.indexOf('iPad') > -1) {
    //iPad
    return false;
  } else if (u.indexOf('Windows Phone') > -1) {
    //winphone手机
    return false;
  } else {
    return false;
  }
};

是否为 PC 端

export const isPC = () => {
  var userAgentInfo = navigator.userAgent;
  var Agents = [
    'Android',
    'iPhone',
    'SymbianOS',
    'Windows Phone',
    'iPad',
    'iPod',
  ];
  var flag = true;
  for (var v = 0; v < Agents.length; v++) {
    if (userAgentInfo.indexOf(Agents[v]) > 0) {
      flag = false;
      break;
    }
  }
  return flag;
};

页面操作

去除 html 标签

export const removeHtmltag = str => {
  return str.replace(/<[^>]+>/g, '');
};

获取 url 参数

export const getQueryString = name => {
  const reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i');
  const search = window.location.search.split('?')[1] || '';
  const r = search.match(reg) || [];
  return r[2];
};

追加 url 参数

export const appendQuery = (url, key, value) => {
  var options = key;
  if (typeof options == 'string') {
    options = {};
    options[key] = value;
  }
  options = $.param(options);
  if (url.includes('?')) {
    url += '&' + options;
  } else {
    url += '?' + options;
  }
  return url;
};

动态引入 js

export const injectScript = src => {
  const s = document.createElement('script');
  s.type = 'text/javascript';
  s.async = true;
  s.src = src;
  const t = document.getElementsByTagName('script')[0];
  t.parentNode.insertBefore(s, t);
};

根据 url 地址下载

export const download = url => {
  var isChrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
  var isSafari = navigator.userAgent.toLowerCase().indexOf('safari') > -1;
  if (isChrome || isSafari) {
    var link = document.createElement('a');
    link.href = url;
    if (link.download !== undefined) {
      var fileName = url.substring(url.lastIndexOf('/') + 1, url.length);
      link.download = fileName;
    }
    if (document.createEvent) {
      var e = document.createEvent('MouseEvents');
      e.initEvent('click', true, true);
      link.dispatchEvent(e);
      return true;
    }
  }
  if (url.indexOf('?') === -1) {
    url += '?download';
  }
  window.open(url, '_self');
  return true;
};

el 是否包含某个 class

export const hasClass = (el, className) => {
  let reg = new RegExp('(^|\\s)' + className + '(\\s|$)');
  return reg.test(el.className);
};

el 添加某个 class

export const addClass = (el, className) => {
  if (hasClass(el, className)) {
    return;
  }
  let newClass = el.className.split(' ');
  newClass.push(className);
  el.className = newClass.join(' ');
};

el 去除某个 class

export const removeClass = (el, className) => {
  if (!hasClass(el, className)) {
    return;
  }
  let reg = new RegExp('(^|\\s)' + className + '(\\s|$)', 'g');
  el.className = el.className.replace(reg, ' ');
};

获取滚动的坐标

export const getScrollPosition = (el = window) => ({
  x: el.pageXOffset !== undefined ? el.pageXOffset : el.scrollLeft,
  y: el.pageYOffset !== undefined ? el.pageYOffset : el.scrollTop,
});

滚动到顶部

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

el 是否在视口范围内

export const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
  const { top, left, bottom, right } = el.getBoundingClientRect();
  const { innerHeight, innerWidth } = window;
  return partiallyVisible
    ? ((top > 0 && top < innerHeight) ||
        (bottom > 0 && bottom < innerHeight)) &&
        ((left > 0 && left < innerWidth) || (right > 0 && right < innerWidth))
    : top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth;
};

拦截粘贴板

export const copyTextToClipboard = value => {
  var textArea = document.createElement('textarea');
  textArea.style.background = 'transparent';
  textArea.value = value;
  document.body.appendChild(textArea);
  textArea.select();
  try {
    var successful = document.execCommand('copy');
  } catch (err) {
    console.log('Oops, unable to copy');
  }
  document.body.removeChild(textArea);
};

文件操作

导出 excel/xlsx

Get

// get请求方法，直接通过url打开
// apiHost:请求域名  prefix请求服务  url:请求地址  data:请求参数
export const exportExcel = (data, url) => {
  let queryStr = '';
  Object.keys(data).forEach(key => {
    if (data[key] !== false && data[key] !== undefined && data[key] !== null) {
      queryStr += `&${key}=${data[key]}`;
    }
  });
  window.location.href = `${apiHost}${prefix}${url}?${queryStr}`;
};

Post

// 接口请求，axios已经设置拦截器并封装了一层
axios({
  url: `${prefix}/materials/export      `,
  data: {
    ...params,
  },
  method: 'POST',
  responseType: 'blob', // 如果返回的是数据/文件流，需要修改responseType为blob或者arraybuffer
});

// post请求方法，返回数据/文件流，请求的responseType要传"arraybuffer"或"blob"
// data就是请求返回的文件数据流，fileName是下载展示的文件名
export const exportExcelPost = (data, fileName) => {
  const link = document.createElement('a');
  const blob = new Blob([data], { type: 'application/x-excel' });
  link.style.display = 'none';
  link.href = URL.createObjectURL(blob);
  link.download = fileName || `导出.xlsx`;
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
};

算法

洗牌算法随机

export const shuffle = arr => {
  let result = [];
  let random;
  while (arr.length > 0) {
    random = Math.floor(Math.random() * arr.length);
    result.push(arr[random]);
    arr.splice(random, 1);
  }
  return result;
};

其它

函数节流器

export const debouncer = (fn, time, interval = 200) => {
  if (time - (window.debounceTimestamp || 0) > interval) {
    fn && fn();
    window.debounceTimestamp = time;
  }
};