26、原生JavaScript压缩CSS样式代码
function yasuoCss (s) {//压缩代码 s = s.replace(////*(.|/n)*?/*///g, ""); //删除注释 s = s.replace(//s*([/{/}/:/;/,])/s*/g, "$1"); s = s.replace(//,[/s/./#/d]*/{/g, "{"); //容错处理 s = s.replace(/;/s*;/g, ";"); //清除连续分号 s = s.match(/^/s*(/S+(/s+/S+)*)/s*$/); //去掉首尾空白 return (s == null) ? "" : s[1]; } 27、原生JavaScript获取当前路径
var currentPageUrl = ""; if (typeof this.href === "undefined") { currentPageUrl = document.location.toString().toLowerCase(); } else { currentPageUrl = this.href.toString().toLowerCase(); } 28、原生JavaScriptIP转成整型
function _ip2int(ip){ var num = 0; ip = ip.split("."); num = Number(ip[0]) * 256 * 256 * 256 + Number(ip[1]) * 256 * 256 + Number(ip[2]) * 256 + Number(ip[3]); num = num >>> 0; return num; } 29、原生JavaScript整型解析为IP地址
function _int2iP(num){ var str; var tt = new Array(); tt[0] = (num >>> 24) >>> 0; tt[1] = ((num << 8) >>> 24) >>> 0; tt[2] = (num << 16) >>> 24; tt[3] = (num << 24) >>> 24; str = String(tt[0]) + "." + String(tt[1]) + "." + String(tt[2]) + "." + String(tt[3]); return str; } 30、原生JavaScript实现checkbox全选与全不选
function checkAll() { var selectall = document.getElementById("selectall"); var allbox = document.getElementsByName("allbox"); if (selectall.checked) { for (var i = 0; i < allbox.length; i++) { allbox[i].checked = true; } } else { for (var i = 0; i < allbox.length; i++) { allbox[i].checked = false; } } } 注:移动篇 (31~40) 31、原生JavaScript判断是否移动设备 function isMobile(){ if (typeof this._isMobile === 'boolean'){ return this._isMobile; } var screenWidth = this.getScreenWidth(); var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new"); if(!fixViewPortsExperiment){ if(!this.isAppleMobileDevice()){ screenWidth = screenWidth/window.devicePixelRatio; } } var isMobileScreenSize = screenWidth < 600; var isMobileUserAgent = false; this._isMobile = isMobileScreenSize && this.isTouchScreen(); return this._isMobile; } 32、原生JavaScript判断是否移动设备访问
function isMobileUserAgent(){ return (/iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test(window.navigator.userAgent.toLowerCase())); } 33、原生JavaScript判断是否苹果移动设备访问
function isAppleMobileDevice(){ return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase())); } 34、原生JavaScript判断是否安卓移动设备访问
function isAndroidMobileDevice(){ return (/android/i.test(navigator.userAgent.toLowerCase())); } 35、原生JavaScript判断是否Touch屏幕
function isTouchScreen(){ return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch); } 36、原生JavaScript判断是否在安卓上的谷歌浏览器
function isNewChromeOnAndroid(){ if(this.isAndroidMobileDevice()){ var userAgent = navigator.userAgent.toLowerCase(); if((/chrome/i.test(userAgent))){ var parts = userAgent.split('chrome/'); var fullVersionString = parts[1].split(" ")[0]; var versionString = fullVersionString.split('.')[0]; var version = parseInt(versionString); if(version >= 27){ return true; } } } return false; } 37、原生JavaScript判断是否打开视窗
function isViewportOpen() { return !!document.getElementById('wixMobileViewport'); } 38、原生JavaScript获取移动设备初始化大小
function getInitZoom(){ if(!this._initZoom){ var screenWidth = Math.min(screen.height, screen.width); if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){ screenWidth = screenWidth/window.devicePixelRatio; } this._initZoom = screenWidth /document.body.offsetWidth; } return this._initZoom; } 39、原生JavaScript获取移动设备最大化大小
function getZoom(){ var screenWidth = (Math.abs(window.orientation) === 90) ? Math.max(screen.height, screen.width) : Math.min(screen.height, screen.width); if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){ screenWidth = screenWidth/window.devicePixelRatio; } var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment === "New" || FixViewPortsExperiment === "new"); if(FixViewPortsExperimentRunning){ return screenWidth / window.innerWidth; }else{ return screenWidth / document.body.offsetWidth; } } 40、原生JavaScript获取移动设备屏幕宽度
function getScreenWidth(){ var smallerSide = Math.min(screen.width, screen.height); var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new"); if(fixViewPortsExperiment){ if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){ smallerSide = smallerSide/window.devicePixelRatio; } } return smallerSide; } 41、原生JavaScript完美判断是否为网址
function IsURL(strUrl) { var regular = /^/b(((https?|ftp):////)?[-a-z0-9]+(/.[-a-z0-9]+)*/.(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|[a-z][a-z]|((25[0-5])|(2[0-4]/d)|(1/d/d)|([1-9]/d)|/d))/b(//[-a-z0-9_:/@&?=+,.!//~%/$]*)?)$/i if (regular.test(strUrl)) { return true; } else { return false; } } 42、原生JavaScript根据样式名称检索元素对象
function getElementsByClassName(name) { var tags = document.getElementsByTagName('*') || document.all; var els = []; for (var i = 0; i < tags.length; i++) { if (tags[i].className) { var cs = tags[i].className.split(' '); for (var j = 0; j < cs.length; j++) { if (name == cs[j]) { els.push(tags[i]); break } } } } return els } 43、原生JavaScript判断是否以某个字符串开头
String.prototype.startWith = function (s) { return this.indexOf(s) == 0 } 44、原生JavaScript判断是否以某个字符串结束
String.prototype.endWith = function (s) { var d = this.length - s.length; return (d >= 0 && this.lastIndexOf(s) == d) } 45、原生JavaScript返回IE浏览器的版本号
function getIE(){ if (window.ActiveXObject){ var v = navigator.userAgent.match(/MSIE ([^;]+)/)[1]; return parseFloat(v.substring(0, v.indexOf("."))) } return false } 46、原生JavaScript获取页面高度
function getPageHeight(){ var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat" ? a : g.documentElement; return Math.max(f.scrollHeight, a.scrollHeight, d.clientHeight); } 47、原生JavaScript获取页面scrollLeft
function getPageScrollLeft(){ var a = document; return a.documentElement.scrollLeft || a.body.scrollLeft; } 48、原生JavaScript获取页面可视宽度
function getPageViewWidth(){ var d = document, a = d.compatMode == "BackCompat" ? d.body : d.documentElement; return a.clientWidth; } 49、原生JavaScript获取页面宽度
function getPageWidth(){ var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat" ? a : g.documentElement; return Math.max(f.scrollWidth, a.scrollWidth, d.clientWidth); } 50、原生JavaScript获取页面scrollTop
function getPageScrollTop(){ var a = document; return a.documentElement.scrollTop || a.body.scrollTop; } |