前端开发常用代码?我们一起去了解并探讨一下这个问题吧!
前端开发常用代码?作者：小明来源：IT技术分享社区Function getBrowser() {var UserAgent = navigator.userAgent.toLowerCase();var browserInfo = {};var browserArray = {IE: window.ActiveXObject || "ActiveXObject" in window, // IEChrome: UserAgent.indexOf('Chrome') > -1 && UserAgent.indexOf('safari') > -1, // Chrome浏览器Firefox: UserAgent.indexOf('firefox') > -1, // 火狐浏览器Opera: UserAgent.indexOf('opera') > -1, // Opera浏览器Safari: UserAgent.indexOf('safari') > -1 && UserAgent.indexOf('chrome') == -1, // safari浏览器Edge: UserAgent.indexOf('edge') > -1, // Edge浏览器QQBrowser: /qqbrowser/.test(UserAgent), // qq浏览器WeixinBrowser: /MicroMessenger/i.test(UserAgent) // 微信浏览器};// console.log(browserArray)for (var i in browserArray) {if (browserArray[i]) {var versions = '';if (i == 'IE') {versions = UserAgent.match(/(msie\s|trident.*rv:)([\w.] )/)[2];} else if (i == 'Chrome') {for (var mt in navigator.mimeTypes) { //检测是否是360浏览器(测试只有pc端的360才起作用) if (navigator.mimeTypes[mt]['type'] == 'application/360softmgrplugin') {i = '360'; }}versions = UserAgent.match(/chrome\/([\d.] )/)[1];} else if (i == 'Firefox') {versions = UserAgent.match(/firefox\/([\d.] )/)[1];} else if (i == 'Opera') {versions = UserAgent.match(/opera\/([\d.] )/)[1];} else if (i == 'Safari') {versions = UserAgent.match(/version\/([\d.] )/)[1];} else if (i == 'Edge') {versions = UserAgent.match(/edge\/([\d.] )/)[1];} else if (i == 'QQBrowser') {versions = UserAgent.match(/qqbrowser\/([\d.] )/)[1];}browserInfo.type = i;browserInfo.versions = parseInt(versions);}}return browserInfo; } ，下面我们就来说一说关于前端开发常用代码?我们一起去了解并探讨一下这个问题吧!
前端开发常用代码
作者：小明来源：IT技术分享社区
1、获取浏览器的版Function getBrowser() {var UserAgent = navigator.userAgent.toLowerCase();var browserInfo = {};var browserArray = {IE: window.ActiveXObject || "ActiveXObject" in window, // IEChrome: UserAgent.indexOf('Chrome') > -1 && UserAgent.indexOf('safari') > -1, // Chrome浏览器Firefox: UserAgent.indexOf('firefox') > -1, // 火狐浏览器Opera: UserAgent.indexOf('opera') > -1, // Opera浏览器Safari: UserAgent.indexOf('safari') > -1 && UserAgent.indexOf('chrome') == -1, // safari浏览器Edge: UserAgent.indexOf('edge') > -1, // Edge浏览器QQBrowser: /qqbrowser/.test(UserAgent), // qq浏览器WeixinBrowser: /MicroMessenger/i.test(UserAgent) // 微信浏览器};// console.log(browserArray)for (var i in browserArray) {if (browserArray[i]) {var versions = '';if (i == 'IE') {versions = UserAgent.match(/(msie\s|trident.*rv:)([\w.] )/)[2];} else if (i == 'Chrome') {for (var mt in navigator.mimeTypes) { //检测是否是360浏览器(测试只有pc端的360才起作用) if (navigator.mimeTypes[mt]['type'] == 'application/360softmgrplugin') {i = '360'; }}versions = UserAgent.match(/chrome\/([\d.] )/)[1];} else if (i == 'Firefox') {versions = UserAgent.match(/firefox\/([\d.] )/)[1];} else if (i == 'Opera') {versions = UserAgent.match(/opera\/([\d.] )/)[1];} else if (i == 'Safari') {versions = UserAgent.match(/version\/([\d.] )/)[1];} else if (i == 'Edge') {versions = UserAgent.match(/edge\/([\d.] )/)[1];} else if (i == 'QQBrowser') {versions = UserAgent.match(/qqbrowser\/([\d.] )/)[1];}browserInfo.type = i;browserInfo.versions = parseInt(versions);}}return browserInfo; }
function colorRGBtoHex(color) {var rgb = color.split(',');var r = parseInt(rgb[0].split('(')[1]);var g = parseInt(rgb[1]);var b = parseInt(rgb[2].split(')')[0]);var hex = "#"((1 << 24)(r << 16)(g << 8)b).toString(16).slice(1);return hex; }
< script type = "text/javascript" > //屏蔽右键菜单 document.oncontextmenu = function(event) {if (window.event) {event = window.event;}try {var the = event.srcElement;if (! ((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {return false;}return true;} catch(e) {return false;} } //屏蔽粘贴 document.onpaste = function(event) {if (window.event) {event = window.event;}try {var the = event.srcElement;if (! ((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {return false;}return true;} catch(e) {return false;} } //屏蔽复制 document.oncopy = function(event) {if (window.event) {event = window.event;}try {var the = event.srcElement;if (! ((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {return false;}return true;} catch(e) {return false;} } //屏蔽剪切 document.oncut = function(event) {if (window.event) {event = window.event;}try {var the = event.srcElement;if (! ((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {return false;}return true;} catch(e) {return false;} } //屏蔽选中 document.onselectstart = function(event) {if (window.event) {event = window.event;}try {var the = event.srcElement;if (! ((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {return false;}return true;} catch(e) {return false;} } < /script>/
function CheckDateTime(str){ var reg = /^(\d )-(\d{1,2})-(\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2})$/; var r = str.match(reg); if(r==null)return false; r[2]=r[2]-1; var d= new Date(r[1], r[2],r[3], r[4],r[5], r[6]); if(d.getFullYear()!=r[1])return false; if(d.getMonth()!=r[2])return false; if(d.getDate()!=r[3])return false; if(d.getHours()!=r[4])return false; if(d.getMinutes()!=r[5])return false; if(d.getSeconds()!=r[6])return false; return true; }
/*** 方法一：js字符串切割* @param {*} str*/ function firstToUpper1(str) {return str.trim().toLowerCase().replace(str[0], str[0].toUpperCase()); } /*** 方法二：js正则* @param {*} str*/ function firstToUpper2(str){return str.replace(/\b(\w)(\w*)/g, function($0, $1, $2) {return $1.toUpperCase()$2.toLowerCase();}); } /*** 方法三：js正则* @param {*} str*/ function firstToUpper3(str){return str.toLowerCase().replace(/( |^)[a-z]/g,(L)=>L.toUpperCase()); }
function getDays(strDateStart,strDateEnd){var strSeparator = "-"; //日期分隔符var oDate1;var oDate2;var iDays;oDate1= strDateStart.split(strSeparator);oDate2= strDateEnd.split(strSeparator);var strDateS = new Date(oDate1[0], oDate1[1]-1, oDate1[2]);var strDateE = new Date(oDate2[0], oDate2[1]-1, oDate2[2]);iDays = parseInt(Math.abs(strDateS - strDateE ) / 1000 / 60 / 60 /24)//把相差的毫秒数转换为天数return iDays ; }
function randomHexColor() { //随机生成十六进制颜色var hex = Math.floor(Math.random() * 16777216).toString(16); //生成ffffff以内16进制数while (hex.length < 6) { //while循环判断hex位数，少于6位前面加0凑够6位hex = '0'hex; }return '#'hex; //返回‘#'开头16进制颜色 }
const removeDuplicates = (arr) => [...new Set(arr)];console.log(removeDuplicates([1, 2, 3, 3, 4, 4, 5, 5, 6])); // Result: [ 1, 2, 3, 4, 5, 6 ]
function getParameterByName(name, url) {if (!url) url = window.location.href;name = name.replace(/[\[\]]/g, "\\$&");var regex = new RegExp("[?&]"name"(=([^]*)|&|#|$)"),results = regex.exec(url);if (!results) return null;if (!results[2]) return '';return decodeURIComponent(results[2].replace(/\ /g, " ")); }
const isEven = num => num % 2 === 0;console.log(isEven(2));// Result: True
const average = (...args) => args.reduce((a, b) => ab) / args.length;average(1, 2, 3, 4); // Result: 2.5
function topFunction() {document.body.scrollTop = 0;document.documentElement.scrollTop = 0;}
// reverse var name = "My city is WH";var resultStr = name.split('').reverse().join(''); console.log(resultStr);// HW si ytic yM// charAt var name = "My city is WuHan";var nameArr = name.split('');var resultStr = '';for (var i = nameArr.length-1; i >= 0; i--) {resultStr= name.charAt(i);}console.log(resultStr); // naHuW si ytic yM
const isNotEmpty = arr => Array.isArray(arr) && arr.length > 0;isNotEmpty([1, 2, 3]); // Result: true
