前端开发常用（个人）

window.scrollTo() 平滑滚动到页面顶部

const scrollToTop = () => {  window.scrollTo({ top: 0, left: 0, behavior: "smooth" });};

滚动到页面底部

const scrollToBottom = () => {  window.scrollTo({    top: document.documentElement.offsetHeight,    left: 0,    behavior: "smooth",  });};

确定设备类型

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

判断设备是安卓还是IOS

const isAndroid = () => {  return /android/i.test(navigator.userAgent.toLowerCase());};
const isIOS = () => {  let reg = /iPhone|iPad|iPod|iOS|Macintosh/i;  return reg.test(navigator.userAgent.toLowerCase());};

获取浏览器类型及其版本

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,      };};

格式化货币
1

const formatMoney = (money) => {  return money.replace(new RegExp(`(?!^)(?=(\d{3})+${money.includes('.') ? '\.' : '$'})`, 'g'), ',')  }
formatMoney('123456789') // '123,456,789'formatMoney('123456789.123') // '123,456,789.123'formatMoney('123') // '123'

2

const formatMoney = (money) => {  return money.toLocaleString()}
formatMoney(123456789) // '123,456,789'formatMoney(123456789.123) // '123,456,789.123'formatMoney(123) // '123'