简介：本文收集了我常用的JavaScript代码片段，欢迎提意见！
大灰狼边敲门边说：“小兔子乖乖，把门儿开开！”小兔子听到后，连忙去开门：“来喽！”兔妈妈对小兔子喊道：“不许开！是大灰狼！”大灰狼在门口感叹道：“哎，骗一个女孩容易，骗一个女人难呀！”
JavaScript动态加载
//NO.1function loadScript(url, callback){ var script = document.createElement ("script") script.type = "text/javascript"; if (script.readyState){ //IE script.onreadystatechange = function(){ if (this.readyState == "loaded" || this.readyState == "complete"){ this.onreadystatechange = null; callback(); } }; } else { //Others script.onload = function(){ callback(); }; } script.src = url; document.getElementsByTagName("head")[0].appendChild(script);}//NO.2function loadScript(url, callback){ var xhr = new XMLHttpRequest(); xhr.open("get", url, true); xhr.onreadystatechange = function(){ if (xhr.readyState == 4){ if (xhr.status >= 200 && xhr.status < 300 || xhr.status == 304){ var script = document.createElement ("script"); script.type = "text/javascript"; script.text = xhr.responseText; document.body.appendChild(script); callback(); } } }; xhr.send(null);} DOM加载完执行
function domLoad(fn){ if(document.addEventListener){ document.addEventListener("DOMContentLoaded", fn, false); }else{ if(window.ActiveXObject){ document.write(" 是否标准模式(IE)
function isCompatMode(){ return document.compatMode == 'CSS1Compat';} Link规则操作
//添加第一条规则//insertRule(sheet, 'body', 'background-color:red', 0);function insertRule(sheet, selectorText, cssText, position) { if (sheet.insertRule) { sheet.insertRule(selectorText + ' { ' + cssText + ' }', position); } else if (sheet.addRule) { sheet.addRule(selectorText, cssText, position); }}//删除第一条规则//deleteRule(sheet, 0);function deleteRule(sheet, position) { if (sheet.deleteRule) { sheet.deleteRule(position); } else if (sheet.removeRule) { sheet.removeRule(position); }} 加载样式表
function addSheet(url){ var oLink = document.createElement('link'),oHead = document.getElementsByTagName('head')[0]; oLink.rel = 'stylesheet'; oLink.type = 'text/css'; oLink.href = url; oHead.appendChild(oLink);} 获取CSS样式
function getStyle(o, attr){ if(o.currentStyle){ return o.currentStyle[attr]; } else{ return getComputedStyle(o,false)[attr]; }} getByClass
function getElementsByClassName(classname, parent, nodename) { var parent = parent || document, nodename = nodename || "*"; if(parent.getElementsByClassName){ return parent.getElementsByClassName(classname); }else{ var l = parent.getElementsByTagName(nodename); return function () { var res = []; for (var i = 0, j = l.length; i < j; i++) { if (l[i].className){ var name = " " + l[i].className + " "; if (name.indexOf(" " + classname + " ") != -1) { res.push(l[i]); } } } return res; } (); }} hasClass
function hasClass (element, className){ return element.className.match(new RegExp('(\\s|^)'+ className +'(\\s|$)'));} addClass
function addClass(element, cName) { if (!hasClass(element, cName)) { element.className += ' ' + cName; }} removeClass
function removeClass(element, cName) { if (hasClass(element, cName)) { element.className = element.className.replace(new RegExp('(\\s|^)' + cName + '(\\s|$)'), ' '); }} JSONP调用
获取服务器时间
function getNowDate(callback){ var xhr = new XMLHttpRequest(); xhr.open('get', 'null.txt', true); //null.txt不存在，我们不需要 xhr.onreadystatechange = function(){ if(xhr.readyState == 3){ //状态3响应 callback(xhr.getResponseHeader('Date')); //返回时间，那么可以利用获得的时间做倒计时程序了。 } }; xhr.send(null);} Cookie操作
function Cookie(name, value, options){ if(typeof value != 'undefined'){ options = options || {}; if(value === null){ options.expires = -1; //过期 } var expires = ''; //存在时间选项 if(options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)){ var date; if(typeof options.expires == 'number'){ date = new Date(); date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000)); }else{ date = options.expires; } expires = '; expires='+date.toUTCString(); } var path = options.path ? '; path='+options.path : ''; var domain = options.domain ? '; domain='+options.domain : ''; var secure = options.secure ? '; secure' : ''; //写入cookie document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join(''); }else{ //读取cookie var cookValue = null; if(document.cookie && document.cookie != ''){ var cookie = document.cookie.split(';'); for(var i = 0, len = cookie.length; i < len; i++){ var c = cookie[i].replace(/^\s+|\s+$/g, ''); if(c.substring(0, name.length + 1) == (name + '=')){ cookValue = decodeURIComponent(c.substring(name.length + 1)); break; } } } return cookValue; }}//设置Cookie("user", "Jununx");//获取Cookie("user");//删除Cookie("user", null); base64编码解码
function b64Encode(str) { return btoa(unescape(encodeURIComponent(str)));}function b64Decode(str) { return decodeURIComponent(escape(atob(str)));} 浏览器判断
var browser = function() { var u = navigator.userAgent.toLowerCase(); return { version: (u.match(/.+(?:rv|it|ra|ie|chrome|micromessenger|version)[\/: ]([\d.]+)/) || [])[1], safari: /safari/.test(u) && !/chrome/.test(u), opera: /opera/.test(u), msie: /msie|like gecko$/.test(u) && !/opera/.test(u), firefox: /firefox/.test(u) && !/(compatible|webkit)/.test(u), chrome: /chrome/.test(u) && /safari/.test(u), mobile: !!/applewebkit.*mobile.*/.test(u), ios: !!/\(i[^;]+;( u;)? cpu.+mac os x/.test(u), android: /android|linux/.test(u), // android或uc iPhone: /iphone/.test(u), iPad: /ipad/.test(u), weChat: /micromessenger/.test(u) // 微信 };}; IE版本判断
var _IE = (function(){ var v = 3, div = document.createElement('div'), all = div.getElementsByTagName('i'); while ( div.innerHTML = ' ', all[0] ); return v > 4 ? v : false ;}()); 阶乘缓存
function memfactorial(n){ if(!memfactorial.cache){ memfactorial.cache = { "0" : 1, "1" : 1 }; } if(!memfactorial.cache.hasOwnProperty(n)){ memfactorial.cache[n] = n * memfactorial(n - 1); } return memfactorial.cache[n];} 获取字符串长度
// NO.1String.prototype.sLen = function(){ var b = 0, l = this.length; if(l){ for(var i = 0; i < l; i++){ if(this.charCodeAt(i) > 255){ b += 2; }else{ b ++; } } return b; }else{ return 0; }};// NO.2String.prototype.sLen = function(){ var b = 0, l = this.length; if(l){ for(var i = 0; i < l; i++){ var c = this.charAt(i); if(escape(c).length > 4){ b += 2; }else if(c != '\r'){ b ++; } } return b; }else{ return 0; }};// NO.3String.prototype.sLen = function(){ var b = 0, l = this.length; if(l){ for(var i = 0; i < l; i++){ var c = this.charAt(i); if(/^[\u0000-\u00ff]$]/.test(c)){ b ++; }else if(c != '\r'){ b += 2; } } return b; }else{ return 0; }};// NO.4String.prototype.sLen = function(){ var s = this.replace(/[^\x00-\xff]/g, "**"); return s.length;}; 判断数据类型
var isType = function(obj, type){ return Object.prototype.toString.call(obj) === '[object '+ type +']';}; 获取窗口位置
function sereen(){ return { left : window.screenLeft || window.scrollX, top : window.screenTop || window.scrollY };} 获取可视窗口大小
function client(){ //IE6不加dtd会进入怪癖模式，client需要通过document.body获取 return { width : document.documentElement.clientWidth || document.body.clientWidth, height : document.documentElement.clientHeight || document.body.clientHeight };} 获取scrollTop
function getScrollTop(){ if(typeof pageYOffset!= 'undefined'){ return pageYOffset; } else { return (document.body || document.documentElement).scrollTop; }} 滚动到指定区域
el.scrollIntoView()
今天星期几
"今天是星期" + "天一二三四五六".charAt(new Date().getDay())
页面是否在iframe里
if(self==top){ //not in iframe}else{ //in iframe} 返回最小值~最大值之间随机数
function random(min, max) { return Math.floor(Math.random() * (max - min + 1) + min);} 数组去重
// NO.1Array.prototype.unique = function() { for(var i=0, len = this.length; i 数组快排
function quickSort(arr) { if (arr.length < 2) { return arr; } var pivotIndex = Math.floor(arr.length / 2); var pivot = arr.splice(pivotIndex, 1)[0]; var left = []; var right = []; for (var i = 0, j = arr.length; i < j; i++) { if (arr[i] < pivot) { left.push(arr[i]); } else { right.push(arr[i]); } } return quickSort(left).concat([pivot], quickSort(right));}var test = quickSort([1,9,2,8,3,7,4,6,5]); 将arguments转换成数组
var arr = Array.prototype.slice.call(arguments, 0);
数组随机排序
var arr = [1, 2, 3, 4, 5];arr.sort(function(){ return (Math.random() - 0.5);}); 获取数组中最小/大值
var max = Math.max.apply(null, array);var min = Math.min.apply(null, array);
数组index
function index(t, arr){ if(arr.indexOf){ return arr.indexOf(t); } for(var i = arr.length ; i--; ){ if(arr[i]===t){ return i*1; } } return -1;} 多维数组转一维数组
function arr2ToArr(arr){ return arr.toString().split(",");} 选择数组中两数之和等于某值的情况
// NO.1var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], result = [], count = 10;for(var i = 0, len = arr.length; i < len; i ++){ for(var j = i + 1; j < len; j ++){ if(arr[i] + arr[j] === count){ result.push([arr[i], arr[j]]); } }}// NO.2var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], result = [], count = 10;for(var i = 0, len = Math.round(arr.length/2); i < len; i ++){ if(arr.indexOf(count - arr[i]) !== -1){ result.push([arr[i], count - arr[i]]); }} 数字金额转换成大写
function digit_uppercase(n) { var fraction = ['角', '分']; var digit = [ '零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖' ]; var unit = [ ['元', '万', '亿'], ['', '拾', '佰', '仟'] ]; var head = n < 0? '欠': ''; n = Math.abs(n); var s = ''; for (var i = 0; i < fraction.length; i++) { s += (digit[Math.floor(n * 10 * Math.pow(10, i)) % 10] + fraction[i]).replace(/零./, ''); } s = s || '整'; n = Math.floor(n); for (var i = 0; i < unit[0].length && n > 0; i++) { var p = ''; for (var j = 0; j < unit[1].length && n > 0; j++) { p = digit[n % 10] + unit[1][j] + p; n = Math.floor(n / 10); } s = p.replace(/(零.)*零$/, '') .replace(/^$/, '零') + unit[0][i] + s; } return head + s.replace(/(零.)*零元/, '元') .replace(/(零.)+/g, '零') .replace(/^整$/, '零元整');} 日期格式化
Date.prototype.toString=function(format,loc){ var time={}; time.Year=this.getFullYear(); time.TYear=(""+time.Year).substr(2); time.Month=this.getMonth()+1; time.TMonth=time.Month<10?"0"+time.Month:time.Month; time.Day=this.getDate(); time.TDay=time.Day<10?"0"+time.Day:time.Day; time.Hour=this.getHours(); time.THour=time.Hour<10?"0"+time.Hour:time.Hour; time.hour=time.Hour<13?time.Hour:time.Hour-12; time.Thour=time.hour<10?"0"+time.hour:time.hour; time.Minute=this.getMinutes(); time.TMinute=time.Minute<10?"0"+time.Minute:time.Minute; time.Second=this.getSeconds(); time.TSecond=time.Second<10?"0"+time.Second:time.Second; time.Millisecond=this.getMilliseconds(); time.Week=this.getDay(); var MMMArrEn=["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"]; var MMMArr=["一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"]; var WeekArrEn=["Sun","Mon","Tue","Web","Thu","Fri","Sat"]; var WeekArr=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"]; var oNumber=time.Millisecond/1000; if(format!=undefined && format.replace(/\s/g,"").length>0){ if(loc!=undefined && loc =="en"){ MMMArr=MMMArrEn.slice(0); WeekArr=WeekArrEn.slice(0); } format=format .replace(/yyyy/ig,time.Year) .replace(/yyy/ig,time.Year) .replace(/yy/ig,time.TYear) .replace(/y/ig,time.TYear) .replace(/MMM/g,MMMArr[time.Month-1]) .replace(/MM/g,time.TMonth) .replace(/M/g,time.Month) .replace(/dd/ig,time.TDay) .replace(/d/ig,time.Day) .replace(/HH/g,time.THour) .replace(/H/g,time.Hour) .replace(/hh/g,time.Thour) .replace(/h/g,time.hour) .replace(/mm/g,time.TMinute) .replace(/m/g,time.Minute) .replace(/ss/ig,time.TSecond) .replace(/s/ig,time.Second) .replace(/fff/ig,time.Millisecond) .replace(/ff/ig,oNumber.toFixed(2)*100) .replace(/f/ig,oNumber.toFixed(1)*10) .replace(/EEE/g,WeekArr[time.Week]); } else{ format=time.Year+"-"+time.Month+"-"+time.Day+" "+time.Hour+":"+time.Minute+":"+time.Second; } return format;}var d=new Date();console.log(d.toString()); //2012-7-27 9:26:52console.log(d.toString("")); //2012-7-27 9:26:52console.log(d.toString("yyyy-MM-dd HH:mm:ss")); //2012-07-27 09:26:52console.log(d.toString("yyyy年MM月dd日 HH:mm:ss")); //2012年07月27日 09:26:52console.log(d.toString("yyyy-MM-dd HH:mm:ss fff")); //2012-07-27 09:26:52 237console.log(d.toString("yyyy年 MMM dd EEE")); //2012年 七月 27 星期五console.log(d.toString("yyyy MMM dd EEE","en")); //2012 Jul 27 Fri 五种继承方式
//构造函数的继承的五种方式function Animal() { this.species = "dong wu";}// NO.1 构造函数绑定function Cat(name, color) { Animal.apply(this, arguments); this.name = name; this.color = color;}// NO.2 prototype模式function Cat (name, color) { this.name = name; this.color = color;}Cat.prototype = new Animal();Cat.prototype.constructor = Cat;// NO.3 直接继承prototypefunction Cat(name, color) { this.name = name; this.color = color;}Cat.prototype = Animal.prototype;Cat.prototype.constructor = Cat;// NO.4 利用空对象做中介function Cat(name, color) { this.name = name; this.color = color;}function F(){}F.prototype = Animal.prototype;Cat.prototype = new F();Cat.prototype.constructor = Cat;// NO.5 拷贝继承function Cat(name, color) { this.name = name; this.color = color;}function extend(Child, Parent) { var p = Parent.prototype; var c = Child.prototype; for (var i in p) { c[i] = p[i]; } c.uber = p;}extend(Cat, Animal); 根据生日算年龄
function getAge(dateString) { var today = new Date(); var birthDate = new Date(dateString); var age = today.getFullYear() - birthDate.getFullYear(); var m = today.getMonth() - birthDate.getMonth(); if (m < 0 || (m === 0 && today.getDate() < birthDate.getDate())) { age--; } return age;}console.log(getAge("1990,1,12")); 事件绑定
var events = (function(win){ // 事件绑定 function on(el, ev, fn){ if(el.addEventlistener){ on = function (el, ev, fn) { el.addEventlistener(ev, fn, false); }; } else if(el.attachEvent){ on = function(el, ev, fn){ el.attachEvent('on' + ev, function(){ fn.call(el); // IE This }); }; } else { on = function(el, ev, fn){ el['on' + ev] = fn; }; } on(el, ev, fn); } // 解除事件绑定 function off(el, ev, fn){ if(el.removeEventlistener){ off = function (el, ev, fn) { el.removeEventlistener(ev, fn, false); }; } else if(el.detachEvent){ off = function(el, ev, fn){ el.detachEvent('on' + ev, fn); }; } else { off = function(el, ev){ el['on' + ev] = null; }; } off(el, ev, fn); } // 获取事件对象 function getEvent(ev){ return ev || win.event; } // 获取事件目标 function getTarget(ev){ return ev.target || ev.srcElement; } // 获取键值 function getKeyCode(ev){ if (typeof ev.charCode == 'number'){ getKeyCode = function(ev){ return ev.charCode; }; } else { getKeyCode = function(ev){ return ev.keyCode; }; } getKeyCode(ev); } // 阻止默认行为 function preventDefault(ev){ if(ev.preventDefault){ preventDefault = function(ev){ ev.preventDefault(); }; } else { preventDefault = function(ev){ ev.returnValue = false; }; } preventDefault(ev); } // 阻止冒泡 function stopPropagation(ev){ if(ev.stopPropagation){ stopPropagation = function(ev){ ev.stopPropagation(); }; } else { stopPropagation = function(ev){ ev.cancelBubble = true; }; } stopPropagation(ev); } return { on: on, off: off, getEvent: getEvent, getTarget: getTarget, getKeyCode: getKeyCode, preventDefault: preventDefault, stopPropagation: stopPropagation };}(window)); 自定义事件
var EventHandlers = { events: {}, fire: function(ev, arg){ if(this.events[ev]){ var e = this.events[ev]; for(var i = 0, len = e.length; i < len; i++){ e[i](arg); } } }, on: function(ev, fn){ if(!this.events[ev]){ this.events[ev] = []; } this.events[ev].push(fn); }, off: function(ev, fn){ if(this.events[ev]){ var e = this.events[ev]; for(var i = 0, len = e.length; i < len; i++){ if(e[i] == fn){ e.splice(i, 1); break; } } } }}; 加载获取图片尺寸
var img = new Image();img.onload = function() { console.log(this.width + 'x' + this.height);} Object.create
var create = Object.create || function(o){ var F = function(o){}; F.prototype = o; return new F;}; Object.prototype.bind
var bind = Object.prototype.bind || function (scope) { var fn = this; return function () { return fn.apply(scope); };}; 设置选定文本
//选定文本function setSelectText(text, start, num) { if (text.setSelectionRange) { text.setSelectionRange(start,num); text.focus(); } else if (text.createTextRange) { var range = text.createTextRange(); range.collapse(true); range.moveStart('character',start); range.moveEnd('character',num - start); //用最后的位置 - 开始的位置 = 个数 range.select(); }} 获取选择文本
function getSelectedText(id){ var o = document.getElementById(id); if(window.getSelection) { if(o.selectionStart != undefined && o.selectionEnd != undefined){ return o.value.substring(o.selectionStart, o.selectionEnd); } } else{ return document.selection.createRange().text; }} 在光标位置插入字符串
// 光标位置插入字符串function insertHtmlAtCursor(id, text){ var o = document.getElementById(id); if (document.selection){ o.focus(); document.selection.createRange().text = text; o.focus(); } else if (o.selectionStart) { var start = o.selectionStart, end = o.selectionEnd; o.value = o.value.substring(0, start) + text + o.value.substring(end, o.value.length); }} 在url中查找指定参数的值
function getQuery(){ var s = (location.search.length > 0 ? location.search.substring(1) : ''), res = {}, items = s.length ? s.split('&') : [], item = null, name = null, value = null, i, len = items.length; for (i = 0; i < len; i++){ item = items[i].split('='); name = decodeURIComponent(item[0]); value = decodeURIComponent(item[1]); if(name.length){ res[name] = value; } } return res;} IE6里a:hover图片缓存
document.execCommand("BackgroundImageCache",false,true); 反转文本顺序
String.prototype.reverse = function (){ if(this.length < 2){ return this; } var str = this.split(''), result = '', len = this.length - 1; while(len >= 0){ result += this[len]; len --; } return result;}'反转文本顺序'.reverse(); 清除空格
String.prototype.trim = String.trim || function() { return this.replace(/^\s*(.*?)\s+$/, "$1")}; 加入收藏
function addFavorite(url, title) { try { window.external.addFavorite(url, title); } catch(e) { try { window.sidebar.addPanel(title, url, ""); } catch(e) { alert("加入收藏失败，请使用Ctrl+D进行添加"); } }} 设为首页
function setHomepage(url) { if (document.all) { document.body.style.behavior = 'url(#default#homepage)'; document.body.setHomePage(url) } else if (window.sidebar) { if (window.netscape) { try { netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect") } catch(e) { alert("该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true") } } var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch); prefs.setCharPref('browser.startup.homepage', url) }} insertAfter
function insertAfter(newChild,refChild){ var parElem=refChild.parentNode; if(parElem.lastChild==refChild){ refChild.appendChild(newChild); }else{ parElem.insertBefore(newChild,refChild.nextSibling); }} innerText操作
//获取innertextfunction getInnerText(element) { if (typeof element.textContent == 'string') { return element.textContent; } else { return element.innerText; }}//设置innertextfunction setInnerText(element, text) { if (typeof element.textContent == 'string') { element.textContent = text; } else { element.innerText = text; }} 获取offsetTop
//获取offsetTopfunction offsetTop(element) { var top = element.offsetTop; //第一层的距离 var parent = element.offsetParent; while (parent !== null) { top += parent.offsetTop; parent = parent.offsetParent; } return top;} 构建字符串的最优方法
var arr = ['item 1', 'item 2', 'item 3', ...]; var list = '
- ' + arr.join('
- ') + '
获取字符串中出现次数最多的字符
// NO.1String.prototype.strCount = function (){ var num = 0, val = '', result = null, temp = '', that = this; while (that) { temp = that; val = that.substr(0, 1); that = that.replace(new RegExp(val, "g"), ""); if (temp.length - that.length > num) { num = temp.length - that.length; result = {val:val, num: num}; } } return result;};// NO.2String.prototype.strCount = function (){ var obj = {}, num = 0, val = ''; for(var i = 0, len = this.length; i < len; i+=1){ if(!obj[this[i]]){ obj[this[i]] = []; } obj[this[i]].push(this[i]); } for(var arr in obj){ if(num < obj[arr].length){ num = obj[arr].length; val = obj[arr][0]; } } return {val:val, num: num};};// NO.3function strCount(str){ var o = {}, ret = {name: '', num: 0}; for(var i = 0, len = str.length; i < len; i++){ if( o[str[i]] ) { o[str[i]]++; }else{ o[str[i]] = 1; } if(ret.num < o[str[i]]){ ret.name = str[i]; ret.num = o[str[i]]; } } return ret;}// NO.4function strCount(str){ var ret = {name: '', num: 0}; str.split('').sort().join('').replace(/(\w)\1+/g, function($0, $1){ if ( ret.num < $0.length ) { ret.num = $0.length; ret.name = $1; } }); return ret;} 对象深度clone
var cloneObj = function(obj){ var newobj, s; if(typeof obj !== 'object'){ return; } newobj = obj.constructor === Object ? {} : []; if(window.JSON){ s = JSON.stringify(obj), //系列化对象 newobj = JSON.parse(s); //反系列化（还原） }else{ if(newobj.constructor === Array){ newobj.concat(obj); }else{ for(var i in obj){ newobj[i] = obj[i]; } } } return newobj;}; 千分位表示
// NO.1function millesimal(v){ var num = v.length%3, prev = '', next = v.substring(num), arr = []; if(num !== 0){ prev = v.substring(0, num); arr.push(prev); } for(var i = 0, len = next.length; i < len; i += 3){ arr.push(next.substr(i,3)) } return arr.join();}// NO.2function millesimal(v){ return v.toString().replace(/(?=(?!\b)(\d{3})+$)/g, ',');}// NO.3function millesimal(v){ return v.toString().replace(/\B(?=(\d{3})+$)/g, ',');} 替换全部
String.prototype.replaceAll = function(s1, s2) { return this.replace(new RegExp(s1, "gm"), s2)} HTML转义
// 转义html标签function HtmlEncode(text) { return text.replace(/&/g, '&').replace(/\"/g, '"').replace(//g, '>')}// 还原html标签function HtmlDecode(text) { return text.replace(/&/g, '&').replace(/"/g, '\"').replace(/</g, '<').replace(/>/g, '>')} 随机字符串（字母&数字）
function randomStringNum(len) { var ret = ""; for( ; ret.length < len; ret += Math.random().toString(36).substr(2)); return ret.substr(0, len);} 随机颜色
// (0xffffff+1) 表示颜色最大值(0x000000 ~ 0xffffff+1)// <<0 表示左移一位，将颜色16进制的颜色值转成整型// toString(16) 表示再将整型的颜色值转成16进制// slice(-6) 表示生成的16进制值少于6位时，首尾依次补0var getRandomColor = function(){ return '#'+('00000'+(Math.random()*(0xffffff+1)<<0).toString(16)).slice(-6);}; curry
function currying(fn) { var args = [].slice.call(arguments, 1); return function() { var newArgs = args.concat([].slice.call(arguments)); return fn.apply(null, newArgs); }}// usevar test = currying(function() { console.log(arguments);}, 'a');test(1); uncurrying
Function.prototype.uncurrying = function(){ var self = this; return function(){ return Function.prototype.call.apply(self, arguments); }}; 函数节流
// 函数节流var throttle = function(fn, interval){ var self = fn, timer, firstTime = true; return function(){ var args = arguments, that = this; if(firstTime){ self.apply(that, args); return firstTime = false; } if(timer){ return false; } timer = setTimeout(function(){ clearTimeout(timer); timer = null; self.apply(that, args); }, interval || 500); };}; 分时调用
/** * [timeChunk 分时调用] * @param {[type]} arr [数据] * @param {Function} fn [处理函数] * @param {[type]} count [执行次数] */var timeChunk = function(arr, fn, count){ var obj, t, len = arr.length; var start = function(){ for (var i = 0, obj; i < Math.min(count || 1, arr.length); i++){ obj = arr.shift(); fn(obj); } }; return function(){ t = setInterval(function(){ if (arr.length === 0){ return clearInterval(t); } start(); }, 200); };}; 单例模式抽象
// 单例模式抽象var getSingle = function(fn){ var res; return function(){ return res || (res = fn.apply(this, arguments)); }};