1.数字操作

（1）生成指定范围随机数

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

（2）数字千分位分隔

  1. export const format = (n) => {
  2.     let num = n.toString();
  3.     let len = num.length;
  4.     if (len <= 3) {
  5.         return num;
  6.     } else {
  7.         let temp = '';
  8.         let remainder = len % 3;
  9.         if (remainder > 0) { // 不是3的整数倍
  10.             return num.slice(0, remainder) + ',' + num.slice(remainder, len).match(/\d{3}/g).join(',') + temp;
  11.         } else { // 3的整数倍
  12.             return num.slice(0, len).match(/\d{3}/g).join(',') + temp; 
  13.         }
  14.     }
  15. }

2.数组操作

（1a）数组乱序

  1. export const arrScrambling = (arr) => {
  2.     for (let i = 0; i < arr.length; i++) {
  3.       const randomIndex = Math.round(Math.random() * (arr.length - 1 - i)) + i;
  4.       [arr[i], arr[randomIndex]] = [arr[randomIndex], arr[i]];
  5.     }
  6.     return arr;
  7. }

（1b）数组乱序

  1. const shuffleArray = (arr) => arr.sort(() => Math.random() - 0.5) 
  2. // 测试
  3. const arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
  4. console.log(shuffleArray(arr))。

（2）数组扁平化

  1. export const flatten = (arr) => {
  2.   let result = [];
  4.   for(let i = 0; i < arr.length; i++) {
  5.     if(Array.isArray(arr[i])) {
  6.       result = result.concat(flatten(arr[i]));
  7.     } else {
  8.       result.push(arr[i]);
  9.     }
  10.   }
  11.   return result;
  12. }

（3）数组中获取随机值

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

（4）提取随机数组，返回新数组

  1. const getRandom = (opt)=> {
  2.   var old_arry = opt.arry,
  3.       range = opt.range;
  4.   //防止超过数组的长度
  5.   range = range > old_arry.length?old_arry.length:range;
  6.   var newArray = [].concat(old_arry), //拷贝原数组进行操作就不会破坏原数组
  7.       valArray = [];
  8.   for (var n = 0; n < range; n++) {
  9.     var r = Math.floor(Math.random() * (newArray.length));
  10.     valArray.push(newArray[r]);
  11.     //在原数组删掉，然后在下轮循环中就可以避免重复获取
  12.     newArray.splice(r, 1);
  13.   }
  14.   return valArray;
  15. }
  16. getRandom({ arry : 'arr',range: 'range' })

（5）数组去重

  1. const getUnique = (arr) => [...new Set(arr)]。
  2. // 测试
  3. const arr = [1, 1, 2, 3, 3, 4, 4, 5, 5];
  4. console.log(getUnique(arr))。

3. 字符串操作

（1）生成随机字符串

  1. export const randomString = (len) => {
  2.     let chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz123456789';
  3.     let strLen = chars.length;
  4.     let randomStr = '';
  5.     for (let i = 0; i < len; i++) {
  6.         randomStr += chars.charAt(Math.floor(Math.random() * strLen));
  7.     }
  8.     return randomStr;
  9. };

（2）字符串首字母大写

  1. export const fistLetterUpper = (str) => {
  2.     return str.charAt(0).toUpperCase() + str.slice(1);
  3. };

（3）手机号中间四位变成*

  1. export const telFormat = (tel) => {
  2.    tel = String(tel); 
  3.     return tel.substr(0,3) + "****" + tel.substr(7);
  4. };

（4）驼峰命名转换成短横线命名

  1. export const getKebabCase = (str) => {
  2.     return str.replace(/[A-Z]/g, (item) => '-' + item.toLowerCase())
  3. }

（5）短横线命名转换成驼峰命名

  1. export const getCamelCase = (str) => {
  2.     return str.replace( /-([a-z])/g, (i, item) => item.toUpperCase())
  3. }

（6）全角转换为半角

  1. export const toCDB = (str) => {
  2.   let result = "";
  3.   for (let i = 0; i < str.length; i++) {
  4.     code = str.charCodeAt(i);
  5.     if (code >= 65281 && code <= 65374) {
  6.       result += String.fromCharCode(str.charCodeAt(i) - 65248);
  7.     } else if (code == 12288) {
  8.       result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);
  9.     } else {
  10.       result += str.charAt(i);
  11.     }
  12.   }
  13.   return result;
  14. }

（7）半角转换为全角

  1. export const toDBC = (str) => {
  2.   let result = "";
  3.   for (let i = 0; i < str.length; i++) {
  4.     code = str.charCodeAt(i);
  5.     if (code >= 33 && code <= 126) {
  6.       result += String.fromCharCode(str.charCodeAt(i) + 65248);
  7.     } else if (code == 32) {
  8.       result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32);
  9.     } else {
  10.       result += str.charAt(i);
  11.     }
  12.   }
  13.   return result;
  14. }

4. 格式转化

（1）数字转化为大写金额

  1. export const digitUppercase = (n) => {
  2.     const fraction = ['角', '分'];
  3.     const digit = [
  4.         '零', '壹', '贰', '叁', '肆',
  5.         '伍', '陆', '柒', '捌', '玖'
  6.     ];
  7.     const unit = [
  8.         ['元', '万', '亿'],
  9.         ['', '拾', '佰', '仟']
  10.     ];
  11.     n = Math.abs(n);
  12.     let s = '';
  13.     for (let i = 0; i < fraction.length; i++) {
  14.         s += (digit[Math.floor(n * 10 * Math.pow(10, i)) % 10] + fraction[i]).replace(/零./, '');
  15.     }
  16.     s = s || '整';
  17.     n = Math.floor(n);
  18.     for (let i = 0; i < unit[0].length && n > 0; i++) {
  19.         let p = '';
  20.         for (let j = 0; j < unit[1].length && n > 0; j++) {
  21.             p = digit[n % 10] + unit[1][j] + p;
  22.             n = Math.floor(n / 10);
  23.         }
  24.         s = p.replace(/(零.)*零$/, '').replace(/^$/, '零') + unit[0][i] + s;
  25.     }
  26.     return s.replace(/(零.)*零元/, '元')
  27.         .replace(/(零.)+/g, '零')
  28.         .replace(/^整$/, '零元整');
  29. };

（2）数字转化为中文数字

  1. export const intToChinese = (value) => {
  2.  const str = String(value);
  3.  const len = str.length-1;
  4.  const idxs = ['','十','百','千','万','十','百','千','亿','十','百','千','万','十','百','千','亿'];
  5.  const num = ['零','一','二','三','四','五','六','七','八','九'];
  6.  return str.replace(/([1-9]|0+)/g, ( $, $1, idx, full) => {
  7.     let pos = 0;
  8.     if($1[0] !== '0'){
  9.       pos = len-idx;
  10.       if(idx == 0 && $1[0] == 1 && idxs[len-idx] == '十'){
  11.         return idxs[len-idx];
  12.       }
  13.       return num[$1[0]] + idxs[len-idx];
  14.     } else {
  15.       let left = len - idx;
  16.       let right = len - idx + $1.length;
  17.       if(Math.floor(right / 4) - Math.floor(left / 4) > 0){
  18.         pos = left - left % 4;
  19.       }
  20.       if( pos ){
  21.         return idxs[pos] + num[$1[0]];
  22.       } else if( idx + $1.length >= len ){
  23.         return '';
  24.       }else {
  25.         return num[$1[0]]
  26.       }
  27.     }
  28.    });
  29. }

（3）文件字节转换

  2. function getfilesize(size) {//把字节转换成正常文件大小
  3.   if (!size)  return "";
  4.   var num = 1024.00; //byte
  5.   if (size < num)
  6.       return size + "B";
  7.   if (size < Math.pow(num, 2))
  8.       return (size / num).toFixed(2) + "KB"; //kb
  9.   if (size < Math.pow(num, 3))
  10.       return (size / Math.pow(num, 2)).toFixed(2) + "MB"; //M
  11.   if (size < Math.pow(num, 4))
  12.       return (size / Math.pow(num, 3)).toFixed(2) + "G"; //G
  13.   return (size / Math.pow(num, 4)).toFixed(2) + "T"; //T
  14. }

5. 操作存储

（1）存储loalStorage

  1. export const loalStorageSet = (key, value) => {
  2.     if (!key) return;
  3.     if (typeof value !== 'string') {
  4.         value = JSON.stringify(value);
  5.     }
  6.     window.localStorage.setItem(key, value);
  7. };

（2）获取localStorage

  1. export const loalStorageGet = (key) => {
  2.     if (!key) return;
  3.     return window.localStorage.getItem(key);
  4. };

（3）删除localStorage

  1. export const loalStorageRemove = (key) => {
  2.     if (!key) return;
  3.     window.localStorage.removeItem(key);
  4. };

（4）存储sessionStorage

  1. export const sessionStorageSet = (key, value) => {
  2.    if (!key) return;
  3.     if (typeof value !== 'string') {
  4.       value = JSON.stringify(value);
  5.     }
  6.     window.sessionStorage.setItem(key, value)
  7. };

（5）获取sessionStorage

  1. export const sessionStorageGet = (key) => {
  2.    if (!key) return;
  3.     return window.sessionStorage.getItem(key)
  4. };

（6）删除sessionStorage

  1. export const sessionStorageRemove = (key) => {
  2.    if (!key) return;
  3.     window.sessionStorage.removeItem(key)
  4. };

6. 操作cookie

（1）设置cookie

  1. export const setCookie = (key, value, expire) => {
  2.       //expire 天数
  3.     const d = new Date();
  4.     d.setDate(d.getDate() + expire);
  5.     document.cookie = `${key}=${value};expires=${d.toUTCString()}`
  6. };

（2）读取cookie

  1. export const getCookie = (key) => {
  2.     const cookieStr = decodeURI(document.cookie);
  3.        const arr = cookieStr.split('; ');
  4.        let cookieValue = '';
  5.        for (let i = 0; i < arr.length; i++) {
  6.            const temp = arr[i].split('=');
  7.            if (temp[0] === key) {
  8.                cookieValue = temp[1];
  9.                break
  10.        }
  11.     }
  12.     return cookieValue
  13. };

（3）删除cookie

  1. export const delCookie = (key) => {
  2.     document.cookie = `${encodeURIComponent(key)}=;expires=${new Date()}`
  3. };

7. 格式校验

（1）校验身份证号码

  1. export const checkCardNo = (value) => {
  2.     let reg = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/;
  3.     return reg.test(value);
  4. };

（2）校验是否包含中文

  1. export const haveCNChars => (value) => {
  2.     return /[\u4e00-\u9fa5]/.test(value);
  3. }

（3）校验是否为中国大陆的邮政编码

  1. export const isPostCode = (value) => {
  2.     return /^[1-9][0-9]{5}$/.test(value.toString());
  3. }

（4）校验是否为IPv6地址

  1. export const isIPv6 = (str) => {
  2.     return Boolean(str.match(/:/g)?str.match(/:/g).length<=7:false && /::/.test(str)?/^([\da-f]{1,4}(:|::)){1,6}[\da-f]{1,4}$/i.test(str):/^([\da-f]{1,4}:){7}[\da-f]{1,4}$/i.test(str));
  3. }

（5）校验是否为邮箱地址

  1. export const isEmail = (value) {
  2.     return /^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/.test(value);
  3. }

（6）校验是否为中国大陆手机号

  1. export const isTel = (value) => {
  2.     return /^1[3,4,5,6,7,8,9][0-9]{9}$/.test(value.toString());
  3. }

（7）校验是否包含emoji表情

  1. export const isEmojiCharacter = (value) => {
  2.    value = String(value);
  3.     for (let i = 0; i < value.length; i++) {
  4.         const hs = value.charCodeAt(i);
  5.         if (0xd800 <= hs && hs <= 0xdbff) {
  6.             if (value.length > 1) {
  7.                 const ls = value.charCodeAt(i + 1);
  8.                 const uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
  9.                 if (0x1d000 <= uc && uc <= 0x1f77f) {
  10.                     return true;
  11.                 }
  12.             }
  13.         } else if (value.length > 1) {
  14.             const ls = value.charCodeAt(i + 1);
  15.             if (ls == 0x20e3) {
  16.                 return true;
  17.             }
  18.         } else {
  19.             if (0x2100 <= hs && hs <= 0x27ff) {
  20.                 return true;
  21.             } else if (0x2B05 <= hs && hs <= 0x2b07) {
  22.                 return true;
  23.             } else if (0x2934 <= hs && hs <= 0x2935) {
  24.                 return true;
  25.             } else if (0x3297 <= hs && hs <= 0x3299) {
  26.                 return true;
  27.             } else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030
  28.                     || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b
  29.                     || hs == 0x2b50) {
  30.                 return true;
  31.             }
  32.         }
  33.     }
  34.    return false;
  35. }

8. 操作URL

（1）获取URL参数列表

  1. export const GetRequest = () => {
  2.     let url = location.search;
  3.     const paramsStr = /.+\?(.+)$/.exec(url)[1]; // 将 ? 后面的字符串取出来
  4.     const paramsArr = paramsStr.split('&'); // 将字符串以 & 分割后存到数组中
  5.     let paramsObj = {};
  6.     // 将 params 存到对象中
  7.     paramsArr.forEach(param => {
  8.       if (/=/.test(param)) { // 处理有 value 的参数
  9.         let [key, val] = param.split('='); // 分割 key 和 value
  10.         val = decodeURIComponent(val); // 解码
  11.         val = /^\d+$/.test(val) ? parseFloat(val) : val; // 判断是否转为数字
  12.         if (paramsObj.hasOwnProperty(key)) { // 如果对象有 key，则添加一个值
  13.           paramsObj[key] = [].concat(paramsObj[key], val);
  14.         } else { // 如果对象没有这个 key，创建 key 并设置值
  15.           paramsObj[key] = val;
  16.         }
  17.       } else { // 处理没有 value 的参数
  18.         paramsObj[param] = true;
  19.       }
  20.     })
  21.     return paramsObj;
  22. };

（2）检测URL是否有效

  1. export const getUrlState = (URL) => {
  2.   let xmlhttp = new ActiveXObject("microsoft.xmlhttp");
  3.   xmlhttp.Open("GET", URL, false);
  4.   try {
  5.     xmlhttp.Send();
  6.   } catch (e) {
  7.   } finally {
  8.     let result = xmlhttp.responseText;
  9.     if (result) {
  10.       if (xmlhttp.Status == 200) {
  11.         return true;
  12.       } else {
  13.         return false;
  14.       }
  15.     } else {
  16.       return false;
  17.     }
  18.   }
  19. }

（3）键值对拼接成URL参数

  1. export const params2Url = (obj) => {
  2.      let params = []
  3.      for (let key in obj) {
  4.        params.push(`${key}=${obj[key]}`);
  5.      }
  6.      return encodeURIComponent(params.join('&'))
  7. }

（4）修改URL中的参数

  1. export const replaceParamVal => (paramName, replaceWith) {
  2.    const oUrl = location.href.toString();
  3.    const re = eval('/('+ paramName+'=)([^&]*)/gi');
  4.    location.href = oUrl.replace(re,paramName+'='+replaceWith);
  5.    return location.href;
  6. }

（5）删除URL中指定参数

  1. export const funcUrlDel = (name) => {
  2.   const baseUrl = location.origin + location.pathname + "?";
  3.   const query = location.search.substr(1);
  4.   if (query.indexOf(name) > -1) {
  5.     const obj = {};
  6.     const arr = query.split("&");
  7.     for (let i = 0; i < arr.length; i++) {
  8.       arr[i] = arr[i].split("=");
  9.       obj[arr[i][0]] = arr[i][1];
  10.     }
  11.     delete obj[name];
  12.     return baseUrl + JSON.stringify(obj).replace(/[\"\{\}]/g,"").replace(/\:/g,"=").replace(/\,/g,"&");
  13.   }
  14. }

9. 设备判断

（1）判断是移动还是PC设备

  1. export const isMobile = () => {
  2.  if((navigator.userAgent.match(/(iPhone|iPod|Android|ios|iOS|iPad|Backerry|WebOS|Symbian|Windows Phone|Phone)/i))) {
  3.   return 'mobile';
  4.   }
  5.   return 'desktop';
  6. }

（2）判断是否是苹果还是安卓移动设备

  1. export const isAppleMobileDevice = () => {
  2.   let reg = /iphone|ipod|ipad|Macintosh/i;
  3.   return reg.test(navigator.userAgent.toLowerCase());
  4. }

（3）判断是否是安卓移动设备

  1. export const isAndroidMobileDevice = () => {
  2.   return /android/i.test(navigator.userAgent.toLowerCase());
  3. }

（4）判断是Windows还是Mac系统

  1. export const osType = () => {
  2.     const agent = navigator.userAgent.toLowerCase();
  3.     const isMac = /macintosh|mac os x/i.test(navigator.userAgent);
  4.    const isWindows = agent.indexOf("win64") >= 0 || agent.indexOf("wow64") >= 0 || agent.indexOf("win32") >= 0 || agent.indexOf("wow32") >= 0;
  5.     if (isWindows) {
  6.         return "windows";
  7.     }
  8.     if(isMac){
  9.         return "mac";
  10.     }
  11. }

（5）判断是否是微信/QQ内置浏览器

  1. export const broswer = () => {
  2.     const ua = navigator.userAgent.toLowerCase();
  3.     if (ua.match(/MicroMessenger/i) == "micromessenger") {
  4.         return "weixin";
  5.     } else if (ua.match(/QQ/i) == "qq") {
  6.         return "QQ";
  7.     }
  8.     return false;
  9. }

（6）浏览器型号和版本

  1. export const getExplorerInfo = () => {
  2.     let t = navigator.userAgent.toLowerCase();
  3.     return 0 <= t.indexOf("msie") ? { //ie < 11
  4.         type: "IE",
  5.         version: Number(t.match(/msie ([\d]+)/)[1])
  6.     } : !!t.match(/trident\/.+?rv:(([\d.]+))/) ? { // ie 11
  7.         type: "IE",
  8.         version: 11
  9.     } : 0 <= t.indexOf("edge") ? {
  10.         type: "Edge",
  11.         version: Number(t.match(/edge\/([\d]+)/)[1])
  12.     } : 0 <= t.indexOf("firefox") ? {
  13.         type: "Firefox",
  14.         version: Number(t.match(/firefox\/([\d]+)/)[1])
  15.     } : 0 <= t.indexOf("chrome") ? {
  16.         type: "Chrome",
  17.         version: Number(t.match(/chrome\/([\d]+)/)[1])
  18.     } : 0 <= t.indexOf("opera") ? {
  19.         type: "Opera",
  20.         version: Number(t.match(/opera.([\d]+)/)[1])
  21.     } : 0 <= t.indexOf("Safari") ? {
  22.         type: "Safari",
  23.         version: Number(t.match(/version\/([\d]+)/)[1])
  24.     } : {
  25.         type: t,
  26.         version: -1
  27.     }
  28. }

10. 浏览器操作

（1）滚动到页面顶部

  1. export const scrollToTop = () => {
  2.   const height = document.documentElement.scrollTop || document.body.scrollTop;
  3.   if (height > 0) {
  4.     window.requestAnimationFrame(scrollToTop);
  5.     window.scrollTo(0, height - height / 8);
  6.   }
  7. }

（2）滚动到页面底部

  1. export const scrollToBottom = () => {
  2.   window.scrollTo(0, document.documentElement.clientHeight);  
  3. }

（3）滚动到指定元素区域

  1. export const smoothScroll = (element) => {
  2.     document.querySelector(element).scrollIntoView({
  3.         behavior: 'smooth'
  4.     });
  5. };

（4）获取可视窗口高度

  1. export const getClientHeight = () => {
  2.     let clientHeight = 0;
  3.     if (document.body.clientHeight && document.documentElement.clientHeight) {
  4.         clientHeight = (document.body.clientHeight < document.documentElement.clientHeight) ? document.body.clientHeight : document.documentElement.clientHeight;
  5.     }
  6.     else {
  7.         clientHeight = (document.body.clientHeight > document.documentElement.clientHeight) ? document.body.clientHeight : document.documentElement.clientHeight;
  8.     }
  9.     return clientHeight;
  10. }

（5）获取可视窗口宽度

  1. export const getPageViewWidth = () => {
  2.     return (document.compatMode == "BackCompat" ? document.body : document.documentElement).clientWidth;
  3. }

（6）打开浏览器全屏

  1. export const toFullScreen = () => {
  2.     let element = document.body;
  3.     if (element.requestFullscreen) {
  4.       element.requestFullscreen()
  5.     } else if (element.mozRequestFullScreen) {
  6.       element.mozRequestFullScreen()
  7.     } else if (element.msRequestFullscreen) {
  8.       element.msRequestFullscreen()
  9.     } else if (element.webkitRequestFullscreen) {
  10.       element.webkitRequestFullScreen()
  11.     }
  12. }

（7）退出浏览器全屏

  1. export const exitFullscreen = () => {
  2.     if (document.exitFullscreen) {
  3.       document.exitFullscreen()
  4.     } else if (document.msExitFullscreen) {
  5.       document.msExitFullscreen()
  6.     } else if (document.mozCancelFullScreen) {
  7.       document.mozCancelFullScreen()
  8.     } else if (document.webkitExitFullscreen) {
  9.       document.webkitExitFullscreen()
  10.     }
  11. }

11. 时间操作

（1）当前时间

  1. export const nowTime = () => {
  2.     const now = new Date();
  3.     const year = now.getFullYear();
  4.     const month = now.getMonth();
  5.     const date = now.getDate() >= 10 ? now.getDate() : ('0' + now.getDate());
  6.     const hour = now.getHours() >= 10 ? now.getHours() : ('0' + now.getHours());
  7.     const miu = now.getMinutes() >= 10 ? now.getMinutes() : ('0' + now.getMinutes());
  8.     const sec = now.getSeconds() >= 10 ? now.getSeconds() : ('0' + now.getSeconds());
  9.     return +year + "年" + (month + 1) + "月" + date + "日 " + hour + ":" + miu + ":" + sec;
  10. }

（2）格式化时间

  1. export const dateFormater = (formater, time) => {
  2.     let date = time ? new Date(time) : new Date(),
  3.         Y = date.getFullYear() + '',
  4.         M = date.getMonth() + 1,
  5.         D = date.getDate(),
  6.         H = date.getHours(),
  7.         m = date.getMinutes(),
  8.         s = date.getSeconds();
  9.     return formater.replace(/YYYY|yyyy/g, Y)
  10.         .replace(/YY|yy/g, Y.substr(2, 2))
  11.         .replace(/MM/g,(M<10 ? '0' : '') + M)
  12.         .replace(/DD/g,(D<10 ? '0' : '') + D)
  13.         .replace(/HH|hh/g,(H<10 ? '0' : '') + H)
  14.         .replace(/mm/g,(m<10 ? '0' : '') + m)
  15.         .replace(/ss/g,(s<10 ? '0' : '') + s)
  16. }
  17. // dateFormater('YYYY-MM-DD HH:mm:ss')
  18. // dateFormater('YYYYMMDDHHmmss')

12. JavaScript操作

（1）阻止冒泡事件

  1. export const stopPropagation = (e) => { 
  2.     e = e || window.event; 
  3.     if(e.stopPropagation) {    // W3C阻止冒泡方法 
  4.         e.stopPropagation(); 
  5.     } else { 
  6.         e.cancelBubble = true; // IE阻止冒泡方法 
  7.     } 
  8. }

（2）防抖函数

  1. export const debounce = (fn, wait) => {
  2.   let timer = null;
  4.   return function() {
  5.     let context = this,
  6.         args = arguments;
  8.     if (timer) {
  9.       clearTimeout(timer);
  10.       timer = null;
  11.     }
  13.     timer = setTimeout(() => {
  14.       fn.apply(context, args);
  15.     }, wait);
  16.   };
  17. }

（3）节流函数

  1. export const throttle = (fn, delay) => {
  2.   let curTime = Date.now();
  4.   return function() {
  5.     let context = this,
  6.         args = arguments,
  7.         nowTime = Date.now();
  9.     if (nowTime - curTime >= delay) {
  10.       curTime = Date.now();
  11.       return fn.apply(context, args);
  12.     }
  13.   };
  14. }

（4）数据类型判断

  1. export const getType = (value) => {
  2.   if (value === null) {
  3.     return value + "";
  4.   }
  5.   // 判断数据是引用类型的情况
  6.   if (typeof value === "object") {
  7.     let valueClass = Object.prototype.toString.call(value),
  8.       type = valueClass.split(" ")[1].split("");
  9.     type.pop();
  10.     return type.join("").toLowerCase();
  11.   } else {
  12.     // 判断数据是基本数据类型的情况和函数的情况
  13.     return typeof value;
  14.   }
  15. }

（5）对象深拷贝

  1. export const deepClone = (obj, hash = new WeakMap()) => {
  2.   // 日期对象直接返回一个新的日期对象
  3.   if (obj instanceof Date){
  4.    return new Date(obj);
  5.   } 
  6.   //正则对象直接返回一个新的正则对象     
  7.   if (obj instanceof RegExp){
  8.    return new RegExp(obj);     
  9.   }
  10.   //如果循环引用,就用 weakMap 来解决
  11.   if (hash.has(obj)){
  12.    return hash.get(obj);
  13.   }
  14.   // 获取对象所有自身属性的描述
  15.   let allDesc = Object.getOwnPropertyDescriptors(obj);
  16.   // 遍历传入参数所有键的特性
  17.   let cloneObj = Object.create(Object.getPrototypeOf(obj), allDesc)
  19.   hash.set(obj, cloneObj)
  20.   for (let key of Reflect.ownKeys(obj)) { 
  21.     if(typeof obj[key] === 'object' && obj[key] !== null){
  22.      cloneObj[key] = deepClone(obj[key], hash);
  23.     } else {
  24.      cloneObj[key] = obj[key];
  25.     }
  26.   }
  27.   return cloneObj
  28. }

（6）复制到剪贴板

  1. const copyToClipboard = (text) => navigator.clipboard?.writeText && navigator.clipboard.writeText（text）
  2. // 测试
  3. copyToClipboard("Hello World!")。

（7）检测黑暗模式

  1. const isDarkMode = () => window.matchMedia && window.matchMedia("(prefers-color-scheme: dark)").matches
  2. // 测试
  3. console.log(isDarkMode())。

（8）滚动到顶部

  1. const scrollToTop = (element) => element.scrollIntoView({ behavior: "smooth", block: "start" })

（9）滚动到底部

  1. const scrollToBottom = (element) => element.scrollIntoView({ behavior: "smooth", block: "end" })

（10）生成随机颜色

  1. const generateRandomHexColor = () => `#${Math.floor(Math.random() * 0xffffff) .toString(16)}`;

声明：

来源于【https://mp.weixin.qq.com/s/n7t6G8sHzQgNPbnjuCjHEQ】
来源于【https://mp.weixin.qq.com/s/6zW8cc9iCq-MORtYSjamdA】