原生態(tài)純JavaScript 100大技巧大收集---你值得擁有 1、原生JavaScript實(shí)現(xiàn)字符串長(zhǎng)度截取
function cutstr(str, len) {var temp;var icount = 0;var patrn = /[^\x00-\xff]/;var strre = "";for (var i = 0; i < str.length; i++) {if (icount < len - 1) {temp = str.substr(i, 1);if (patrn.exec(temp) == null) {icount = icount + 1} else {icount = icount + 2}strre += temp} else {break}}return strre + "..."
}
2、原生JavaScript獲取域名主機(jī)
function getHost(url) {var host = "null";if(typeof url == "undefined"|| null == url) {url = window.location.href;}var regex = /^\w+\:\/\/([^\/]*).*/;var match = url.match(regex);if(typeof match != "undefined" && null != match) {host = match[1];}return host;
}
3、原生JavaScript清除空格
String.prototype.trim = function() {var reExtraSpace = /^\s*(.*?)\s+$/;return this.replace(reExtraSpace, "$1")
}
4、原生JavaScript替換全部
String.prototype.replaceAll = function(s1, s2) {return this.replace(new RegExp(s1, "gm"), s2)
}
5、原生JavaScript轉(zhuǎn)義html標(biāo)簽
function HtmlEncode(text) {return text.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').replace(/>/g, '>')
}
6、原生JavaScript還原h(huán)tml標(biāo)簽
function HtmlDecode(text) {return text.replace(/&/g, '&').replace(/"/g, '\"').replace(/</g, '<').replace(/>/g, '>')
}
7、原生JavaScript時(shí)間日期格式轉(zhuǎn)換
Date.prototype.Format = function(formatStr) {var str = formatStr;var Week = ['日', '一', '二', '三', '四', '五', '六'];str = str.replace(/yyyy|YYYY/, this.getFullYear());str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100));str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1));str = str.replace(/M/g, (this.getMonth() + 1));str = str.replace(/w|W/g, Week[this.getDay()]);str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());str = str.replace(/d|D/g, this.getDate());str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());str = str.replace(/h|H/g, this.getHours());str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());str = str.replace(/m/g, this.getMinutes());str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());str = str.replace(/s|S/g, this.getSeconds());return str
}
8、原生JavaScript判斷是否為數(shù)字類(lèi)型
function isDigit(value) {var patrn = /^[0-9]*$/;if (patrn.exec(value) == null || value == "") {return false} else {return true}
}
9、原生JavaScript設(shè)置cookie值
function setCookie(name, value, Hours) {var d = new Date();var offset = 8;var utc = d.getTime() + (d.getTimezoneOffset() * 60000);var nd = utc + (3600000 * offset);var exp = new Date(nd);exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;"
}
10、原生JavaScript獲取cookie值
function getCookie(name) {var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));if (arr != null) return unescape(arr[2]);return null
}
11、原生JavaScript加入收藏夾
function AddFavorite(sURL, sTitle) {try {window.external.addFavorite(sURL, sTitle)} catch(e) {try {window.sidebar.addPanel(sTitle, sURL, "")} catch(e) {alert("加入收藏失敗，請(qǐng)使用Ctrl+D進(jìn)行添加")}}
}
12、原生JavaScript設(shè)為首頁(yè)
function setHomepage() {if (document.all) {document.body.style.behavior = 'url(#default#homepage)';document.body.setHomePage('http://www.jq-school.com')} else if (window.sidebar) {if (window.netscape) {try {netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect")} catch(e) {alert("該操作被瀏覽器拒絕，如果想啟用該功能，請(qǐng)?jiān)诘刂窓趦?nèi)輸入 about:config,然后將項(xiàng) signed.applets.codebase_principal_support 值該為true")}}var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);prefs.setCharPref('browser.startup.homepage', 'http://www.jq-school.com')}
}
13、原生JavaScript判斷IE6
var ua = navigator.userAgent.toLowerCase();
var isIE6 = ua.indexOf("msie 6") > -1;
if (isIE6) {try {document.execCommand("BackgroundImageCache", false, true)} catch(e) {}
}
14、原生JavaScript加載樣式文件
function LoadStyle(url) {try {document.createStyleSheet(url)} catch(e) {var cssLink = document.createElement('link');cssLink.rel = 'stylesheet';cssLink.type = 'text/css';cssLink.href = url;var head = document.getElementsByTagName('head')[0];head.appendChild(cssLink)}
}
15、原生JavaScript返回腳本內(nèi)容
function evalscript(s) {if(s.indexOf('<script') == -1) return s;var p = /<script[^\>]*?>([^\x00]*?)<\/script>/ig;var arr = [];while(arr = p.exec(s)) {var p1 = /<script[^\>]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/i;var arr1 = [];arr1 = p1.exec(arr[0]);if(arr1) {appendscript(arr1[1], '', arr1[2], arr1[3]);} else {p1 = /<script(.*?)>([^\x00]+?)<\/script>/i;arr1 = p1.exec(arr[0]);appendscript('', arr1[2], arr1[1].indexOf('reload=') != -1);}}return s;
}
16、原生JavaScript清除腳本內(nèi)容
function stripscript(s) {return s.replace(/<script.*?>.*?<\/script>/ig, '');
}
17、原生JavaScript動(dòng)態(tài)加載腳本文件
function appendscript(src, text, reload, charset) {var id = hash(src + text);if(!reload && in_array(id, evalscripts)) return;if(reload && $(id)) {$(id).parentNode.removeChild($(id));}evalscripts.push(id);var scriptNode = document.createElement("script");scriptNode.type = "text/javascript";scriptNode.id = id;scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset);try {if(src) {scriptNode.src = src;scriptNode. = false;scriptNode.onload = function () {scriptNode. = true;JSLOADED[src] = 1;};scriptNode.onreadystatechange = function () {if((scriptNode.readyState == 'loaded' || scriptNode.readyState == 'complete') && !scriptNode. {scriptNode. = true;JSLOADED[src] = 1;}};} else if(text){scriptNode.text = text;}document.getElementsByTagName('head')[0].appendChild(scriptNode);} catch(e) {}
}
18、原生JavaScript返回按ID檢索的元素對(duì)象
function $(id) {return !id ? null : document.getElementById(id);
}
19、原生JavaScript返回瀏覽器版本內(nèi)容
function browserVersion(types) {var other = 1;for(i in types) {var v = types[i] ? types[i] : i;if(USERAGENT.indexOf(v) != -1) {var re = new RegExp(v + '(\\/|\\s)([\\d\\.]+)', 'ig');var matches = re.exec(USERAGENT);var ver = matches != null ? matches[2] : 0;other = ver !== 0 && v != 'mozilla' ? 0 : other;}else {var ver = 0;}eval('BROWSER.' + i + '= ver');}BROWSER.other = other;
}
20、原生JavaScript元素顯示的通用方法
function $(id) {return !id ? null : document.getElementById(id);
}
function display(id) {var obj = $(id);if(obj.style.visibility) {obj.style.visibility = obj.style.visibility == 'visible' ? 'hidden' : 'visible';} else {obj.style.display = obj.style.display == '' ? 'none' : '';}
}
21、原生JavaScript中有insertBefore方法,可惜卻沒(méi)有insertAfter方法?用如下函數(shù)實(shí)現(xiàn)
function insertAfter(newChild,refChild){ var parElem=refChild.parentNode; if(parElem.lastChild==refChild){ refChild.appendChild(newChild); }else{ parElem.insertBefore(newChild,refChild.nextSibling); }
}
22、原生JavaScript中兼容瀏覽器綁定元素事件
function addEventSamp(obj,evt,fn){ if (obj.addEventListener) { obj.addEventListener(evt, fn, false); }else if(obj.attachEvent){ obj.attachEvent('on'+evt,fn); }
}
23、原生JavaScript光標(biāo)停在文字的后面，文本框獲得焦點(diǎn)時(shí)調(diào)用
function focusLast(){ var e = event.srcElement; var r =e.createTextRange(); r.moveStart('character',e.value.length); r.collapse(true); r.select();
}
24、原生JavaScript檢驗(yàn)URL鏈接是否有效
function getUrlState(URL){ var xmlhttp = new ActiveXObject("microsoft.xmlhttp"); xmlhttp.Open("GET",URL, false); try{ xmlhttp.Send(); }catch(e){}finally{ var result = xmlhttp.responseText; if(result){ if(xmlhttp.Status==200){ return(true); }else{ return(false); } }else{ return(false); } }
}
25、原生JavaScript格式化CSS樣式代碼
function formatCss(s){//格式化代碼s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");s = s.replace(/;\s*;/g, ";"); //清除連續(xù)分號(hào)s = s.replace(/\,[\s\.\#\d]*{/g, "{");s = s.replace(/([^\s])\{([^\s])/g, "$1 {\n\t$2");s = s.replace(/([^\s])\}([^\n]*)/g, "$1\n}\n$2");s = s.replace(/([^\s]);([^\s\}])/g, "$1;\n\t$2");return s;
}
26、原生JavaScript壓縮CSS樣式代碼
function yasuoCss (s) {//壓縮代碼s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //刪除注釋s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容錯(cuò)處理s = s.replace(/;\s*;/g, ";"); //清除連續(xù)分號(hào)s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白return (s == null) ? "" : s[1];
}
27、原生JavaScript獲取當(dāng)前路徑
var currentPageUrl = "";
if (typeof this.href === "undefined") {currentPageUrl = document.location.toString().toLowerCase();
}
else {currentPageUrl = this.href.toString().toLowerCase();
}
28、原生JavaScriptIP轉(zhuǎn)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整型解析為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實(shí)現(xiàn)checkbox全選與全不選
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;}}
}
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判斷是否移動(dòng)設(shè)備訪問(wèn)
function isMobileUserAgent(){return (/iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test(window.navigator.userAgent.toLowerCase()));
}
33、原生JavaScript判斷是否蘋(píng)果移動(dòng)設(shè)備訪問(wèn)
function isAppleMobileDevice(){return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));
}
34、原生JavaScript判斷是否安卓移動(dòng)設(shè)備訪問(wèn)
function isAndroidMobileDevice(){return (/android/i.test(navigator.userAgent.toLowerCase()));
}
35、原生JavaScript判斷是否Touch屏幕
function isTouchScreen(){return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch);
}
36、原生JavaScript判斷是否在安卓上的谷歌瀏覽器
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判斷是否打開(kāi)視窗
function isViewportOpen() {return !!document.getElementById('wixMobileViewport');
}
38、原生JavaScript獲取移動(dòng)設(shè)備初始化大小
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獲取移動(dòng)設(shè)備最大化大小
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獲取移動(dòng)設(shè)備屏幕寬度
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完美判斷是否為網(wǎng)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_:\@&?=+,.!\/~%\$]*)?)$/iif (regular.test(strUrl)) {return true;}else {return false;}
}
42、原生JavaScript根據(jù)樣式名稱(chēng)檢索元素對(duì)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判斷是否以某個(gè)字符串開(kāi)頭
String.prototype.startWith = function (s) {return this.indexOf(s) == 0
}
44、原生JavaScript判斷是否以某個(gè)字符串結(jié)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瀏覽器的版本號(hào)
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獲取頁(yè)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獲取頁(yè)面scrollLeft
function getPageScrollLeft(){var a = document;return a.documentElement.scrollLeft || a.body.scrollLeft;
}
48、原生JavaScript獲取頁(yè)面可視寬度
function getPageViewWidth(){var d = document, a = d.compatMode == "BackCompat"? d.body: d.documentElement;return a.clientWidth;
}
49、原生JavaScript獲取頁(yè)面寬度
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獲取頁(yè)面scrollTop
function getPageScrollTop(){var a = document;return a.documentElement.scrollTop || a.body.scrollTop;
}
51、原生JavaScript獲取頁(yè)面可視高度
?????
56、原生JavaScript全角半角轉(zhuǎn)換,iCase: 0全到半，1半到全，其他不轉(zhuǎn)化
??
58、原生JavaScript獲取網(wǎng)頁(yè)被卷去的位置
???
61、原生JavaScript解決offsetX兼容性問(wèn)題
// 針對(duì)火狐不支持offsetX/Y
function getOffset(e){var target = e.target, // 當(dāng)前觸發(fā)的目標(biāo)對(duì)象eventCoord,pageCoord,offsetCoord;// 計(jì)算當(dāng)前觸發(fā)元素到文檔的距離pageCoord = getPageCoord(target);// 計(jì)算光標(biāo)到文檔的距離eventCoord = {X : window.pageXOffset + e.clientX,Y : window.pageYOffset + e.clientY};// 相減獲取光標(biāo)到第一個(gè)定位的父元素的坐標(biāo)offsetCoord = {X : eventCoord.X - pageCoord.X,Y : eventCoord.Y - pageCoord.Y};return offsetCoord;
}function getPageCoord(element){var coord = { X : 0, Y : 0 };// 計(jì)算從當(dāng)前觸發(fā)元素到根節(jié)點(diǎn)為止，// 各級(jí) offsetParent 元素的 offsetLeft 或 offsetTop 值之和while (element){coord.X += element.offsetLeft;coord.Y += element.offsetTop;element = element.offsetParent;}return coord;
}
62、原生JavaScript常用的正則表達(dá)式
//正整數(shù)
/^[0-9]*[1-9][0-9]*$/;
//負(fù)整數(shù)
/^-[0-9]*[1-9][0-9]*$/;
//正浮點(diǎn)數(shù)
/^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;
//負(fù)浮點(diǎn)數(shù)
/^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/;
//浮點(diǎn)數(shù)
/^(-?\d+)(\.\d+)?$/;
//email地址
/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;
//url地址
/^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/;
//年/月/日（年-月-日、年.月.日）
/^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/;
//匹配中文字符
/[\u4e00-\u9fa5]/;
//匹配帳號(hào)是否合法(字母開(kāi)頭，允許5-10字節(jié)，允許字母數(shù)字下劃線)
/^[a-zA-Z][a-zA-Z0-9_]{4,9}$/;
//匹配空白行的正則表達(dá)式
/\n\s*\r/;
//匹配中國(guó)郵政編碼
/[1-9]\d{5}(?!\d)/;
//匹配×××
/\d{15}|\d{18}/;
//匹配國(guó)內(nèi)電話號(hào)碼
/(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/;
//匹配IP地址
/((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/;
//匹配首尾空白字符的正則表達(dá)式
/^\s*|\s*$/;
//匹配HTML標(biāo)記的正則表達(dá)式
< (\S*?)[^>]*>.*?|< .*? />;
63、原生JavaScript實(shí)現(xiàn)返回頂部的通用方法
function backTop(btnId) {var btn = document.getElementById(btnId);var d = document.documentElement;var b = document.body;window.onscroll = set;btn.style.display = "none";btn.onclick = function() {btn.style.display = "none";window.onscroll = null;this.timer = setInterval(function() {d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set);},10);};function set() {btn.style.display = (d.scrollTop + b.scrollTop > 100) ? 'block': "none"}
};
backTop('goTop');
64、原生JavaScript獲得URL中GET參數(shù)值
// 用法：如果地址是 test.htm?t1=1&t2=2&t3=3, 那么能取得：GET["t1"], GET["t2"], GET["t3"]
function get_get(){ querystr = window.location.href.split("?")if(querystr[1]){GETs = querystr[1].split("&")GET =new Array()for(i=0;i<GETs.length;i++){tmp_arr = GETs[i].split("=")key=tmp_arr[0]GET[key] = tmp_arr[1]}}return querystr[1];
}
65、原生JavaScript實(shí)現(xiàn)全選通用方法
function checkall(form, prefix, checkall) {var checkall = checkall ? checkall : 'chkall';for(var i = 0; i < form.elements.length; i++) {var e = form.elements[i];if(e.type=="checkbox"){e.checked = form.elements[checkall].checked;}}
}
66、原生JavaScript實(shí)現(xiàn)全部取消選擇通用方法
function uncheckAll(form) {for (var i=0;i<form.elements.length;i++){var e = form.elements[i];if (e.name != 'chkall')e.checked=!e.checked;}
}
67、原生JavaScript實(shí)現(xiàn)打開(kāi)一個(gè)窗體通用方法
function openWindow(url,windowName,width,height){var x = parseInt(screen.width / 2.0) - (width / 2.0); var y = parseInt(screen.height / 2.0) - (height / 2.0);var isMSIE= (navigator.appName == "Microsoft Internet Explorer");if (isMSIE) {var p = "resizable=1,location=no,scrollbars=no,width=";p = p+width;p = p+",height=";p = p+height;p = p+",left=";p = p+x;p = p+",top=";p = p+y;retval = window.open(url, windowName, p);} else {var win = window.open(url, "ZyiisPopup", "top=" + y + ",left=" + x + ",scrollbars=" + scrollbars + ",dialog=yes,modal=yes,width=" + width + ",height=" + height + ",resizable=no" );eval("try { win.resizeTo(width, height); } catch(e) { }");win.focus();}
}
68、原生JavaScript判斷是否為客戶(hù)端設(shè)備
function client(o){ var b = navigator.userAgent.toLowerCase(); var t = false;if (o == 'isOP'){t = b.indexOf('opera') > -1;}if (o == 'isIE'){t = b.indexOf('msie') > -1;}if (o == 'isFF'){t = b.indexOf('firefox') > -1;}return t;
}
69、原生JavaScript獲取單選按鈕的值
function get_radio_value(field){if(field&&field.length){ for(var i=0;i<field.length;i++){ if(field[i].checked){ return field[i].value; } } }else { return ; }
}
70、原生JavaScript獲取復(fù)選框的值
function get_checkbox_value(field){ if(field&&field.length){ for(var i=0;i<field.length;i++){ if(field[i].checked && !field[i].disabled){return field[i].value;}} }else {return;}
}
71、原生JavaScript判斷是否為郵箱
function isEmail(str){var re=/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/; if (re.test(str) != true) {return false;}else{return true;}
}
72、原生JavaScript判斷是否有列表中的危險(xiǎn)字符
function isValidReg(chars){var re=/<|>|\[|\]|\{|\}|『|』|※|○|●|◎|§|△|▲|☆|★|◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|ㄅ|ㄆ|ㄇ|ㄈ|ㄉ|ㄊ|ㄋ|ㄌ|ㄍ|ㄎ|ㄏ|ㄐ|ㄑ|ㄒ|ㄓ|ㄔ|ㄕ|ㄖ|ㄗ|ㄘ|ㄙ|(zhì)ㄚ|ㄛ|ㄜ|ㄝ|ㄞ|ㄟ|ㄢ|ㄣ|ㄤ|ㄥ|ㄦ|ㄧ|ㄨ|ㄩ|■|▄|▆|\*|@|#|\^|\\/;if (re.test( chars) == true) {return false;}else{return true;}
}
73、原生JavaScript判斷字符串是否大于規(guī)定的長(zhǎng)度
function isValidLength(chars, len) {if (chars.length < len) {return false;}return true;
}
74、原生JavaScript判斷字符串是為網(wǎng)址不區(qū)分大小寫(xiě)
function isValidURL( chars ) {var re=/^([hH][tT]{2}[pP]:\/\/|[hH][tT]{2}[pP][sS]:\/\/)(\S+\.\S+)$/;if (!isNULL(chars)) {chars = jsTrim(chars);if (chars.match(re) == null)return false;elsereturn true;}return false;
}
75、原生JavaScript判斷字符串是否為小數(shù)
function isValidDecimal( chars ) {var re=/^\d*\.?\d{1,2}$/;if (chars.match(re) == null)return false;elsereturn true;
}
76、原生JavaScript判斷字符串是否為整數(shù)
function isNumber( chars ) {var re=/^\d*$/;if (chars.match(re) == null)return false;elsereturn true;
}
77、原生JavaScript判斷字符串是否為浮點(diǎn)數(shù)
function isFloat( str ) {for(i=0;i<str.length;i++) {if ((str.charAt(i)<"0" || str.charAt(i)>"9")&& str.charAt(i) != '.'){return false;}}return true;
}
78、原生JavaScript判斷字符是否為A-Za-z英文字母
function isLetters( str ){var re=/^[A-Za-z]+$/;if (str.match(re) == null)return false;elsereturn true;
}
79、原生JavaScript判斷字符串是否郵政編碼
function isValidPost( chars ) {var re=/^\d{6}$/;if (chars.match(re) == null)return false;elsereturn true;
}
80、原生JavaScript判斷字符是否空NULL
function isNULL( chars ) {if (chars == null)return true;if (jsTrim(chars).length==0)return true;return false;
}
81、原生JavaScript用正則表達(dá)式提取頁(yè)面代碼中所有網(wǎng)址
var aa = document.documentElement.outerHTML.match(/(url\(|src=|href=)[\"\']*([^\"\'\(\)\<\>\[\] ]+)[\"\'\)]*|(http:\/\/[\w\-\.]+[^\"\'\(\)\<\>\[\] ]+)/ig).join("\r\n").replace(/^(src=|href=|url\()[\"\']*|[\"\'\>\) ]*$/igm,"");
alert(aa)
82、原生JavaScript用正則表達(dá)式清除相同的數(shù)組(低效率)
Array.prototype.unique=function(){return this.reverse().join(",").match(/([^,]+)(?!.*\1)/ig).reverse();
}
83、原生JavaScript用正則表達(dá)式清除相同的數(shù)組(高效率)
String.prototype.unique=function(){var x=this.split(/[\r\n]+/);var y='';for(var i=0;i<x.length;i++){if(!new RegExp("^"+x[i].replace(/([^\w])/ig,"\\$1")+"$","igm").test(y)){y+=x[i]+"\r\n"}}return y
}
84、原生JavaScript用正則表達(dá)式按字母排序，對(duì)每行進(jìn)行數(shù)組排序
function SetSort(){var text=K1.value.split(/[\r\n]/).sort().join("\r\n");//順序var test=K1.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序K1.value=K1.value!=text?text:test;
}
85、原生JavaScript字符串反序
function IsReverse(text){return text.split('').reverse().join('');
}
86、原生JavaScript用正則表達(dá)式清除html代碼中的腳本
function clear_script(){K1.value=K1.value.replace(/<script.*?>[\s\S]*?<\/script>|\s+on[a-zA-Z]{3,16}\s?=\s?"[\s\S]*?"|\s+on[a-zA-Z]{3,16}\s?=\s?'[\s\S]*?'|\s+on[a-zA-Z]{3,16}\s?=[^ >]+/ig,"");
}
87、原生JavaScript動(dòng)態(tài)執(zhí)行JavaScript腳本
function javascript(){try{eval(K1.value);}catch(e){alert(e.message);}
}
88、原生JavaScript動(dòng)態(tài)執(zhí)行VBScript腳本
function vbscript(){try{var script=document.getElementById("K1").value;if(script.trim()=="")return;window.execScript('On Error Resume Next \n'+script+'\n If Err.Number<>0 Then \n MsgBox "請(qǐng)輸入正確的VBScript腳本!",48,"腳本錯(cuò)誤!" \n End If',"vbscript")}catch(e){alert(e.message);}
}
89、原生JavaScript實(shí)現(xiàn)金額大寫(xiě)轉(zhuǎn)換函數(shù)
function transform(tranvalue) {try {var i = 1;var dw2 = new Array("", "萬(wàn)", "億"); //大單位var dw1 = new Array("拾", "佰", "仟"); //小單位var dw = new Array("零", "壹", "貳", "叁", "肆", "伍", "陸", "柒", "捌", "玖"); //整數(shù)部分用//以下是小寫(xiě)轉(zhuǎn)換成大寫(xiě)顯示在合計(jì)大寫(xiě)的文本框中 //分離整數(shù)與小數(shù)var source = splits(tranvalue);var num = source[0];var dig = source[1];//轉(zhuǎn)換整數(shù)部分var k1 = 0; //計(jì)小單位var k2 = 0; //計(jì)大單位var sum = 0;var str = "";var len = source[0].length; //整數(shù)的長(zhǎng)度f(wàn)or (i = 1; i <= len; i++) {var n = source[0].charAt(len - i); //取得某個(gè)位數(shù)上的數(shù)字var bn = 0;if (len - i - 1 >= 0) {bn = source[0].charAt(len - i - 1); //取得某個(gè)位數(shù)前一位上的數(shù)字}sum = sum + Number(n);if (sum != 0) {str = dw[Number(n)].concat(str); //取得該數(shù)字對(duì)應(yīng)的大寫(xiě)數(shù)字，并插入到str字符串的前面if (n == '0') sum = 0;}if (len - i - 1 >= 0) { //在數(shù)字范圍內(nèi)if (k1 != 3) { //加小單位if (bn != 0) {str = dw1[k1].concat(str);}k1++;} else { //不加小單位，加大單位k1 = 0;var temp = str.charAt(0);if (temp == "萬(wàn)" || temp == "億") //若大單位前沒(méi)有數(shù)字則舍去大單位str = str.substr(1, str.length - 1);str = dw2[k2].concat(str);sum = 0;}}if (k1 == 3) //小單位到千則大單位進(jìn)一{k2++;}}//轉(zhuǎn)換小數(shù)部分var strdig = "";if (dig != "") {var n = dig.charAt(0);if (n != 0) {strdig += dw[Number(n)] + "角"; //加數(shù)字}var n = dig.charAt(1);if (n != 0) {strdig += dw[Number(n)] + "分"; //加數(shù)字}}str += "元" + strdig;} catch(e) {return "0元";}return str;
}
//拆分整數(shù)與小數(shù)
function splits(tranvalue) {var value = new Array('', '');temp = tranvalue.split(".");for (var i = 0; i < temp.length; i++) {value[i] = temp[i];}return value;
}
90、原生JavaScript常用的正則表達(dá)式大收集
匹配中文字符的正則表達(dá)式： [\u4e00-\u9fa5]
匹配雙字節(jié)字符（包括漢字在內(nèi)）：[^\x00-\xff]
匹配空行的正則表達(dá)式：\n[\s| ]*\r
匹配 HTML 標(biāo)記的正則表達(dá)式：<(.*)>.*<\/\1>|<(.*) \/>
匹配首尾空格的正則表達(dá)式：(^\s*)|(\s*$)
匹配 IP 地址的正則表達(dá)式：/(\d+)\.(\d+)\.(\d+)\.(\d+)/g
匹配 Email 地址的正則表達(dá)式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
匹配網(wǎng)址 URL 的正則表達(dá)式：http://(/[\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
sql 語(yǔ)句：^(select|drop|delete|create|update|insert).*$
非負(fù)整數(shù)：^\d+$
正整數(shù)：^[0-9]*[1-9][0-9]*$
非正整數(shù)：^((-\d+)|(0+))$
負(fù)整數(shù)：^-[0-9]*[1-9][0-9]*$
整數(shù)：^-?\d+$
非負(fù)浮點(diǎn)數(shù)：^\d+(\.\d+)?$
正浮點(diǎn)數(shù)：^((0-9)+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$
非正浮點(diǎn)數(shù)：^((-\d+\.\d+)?)|(0+(\.0+)?))$
英文字符串：^[A-Za-z]+$
英文大寫(xiě)串：^[A-Z]+$
英文小寫(xiě)串：^[a-z]+$
英文字符數(shù)字串：^[A-Za-z0-9]+$
英數(shù)字加下劃線串：^\w+$
E-mail地址：^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$
URL：^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\s*)?$ 或：^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$
郵政編碼：^[1-9]\d{5}$
電話號(hào)碼：^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?$
手機(jī)號(hào)碼：^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}$
雙字節(jié)字符（包括漢字在內(nèi)）：^\x00-\xff
匹配首尾空格：(^\s*)|(\s*$)
匹配 HTML 標(biāo)記：<(.*)>.*<\/\1>|<(.*) \/>
匹配空行：\n[\s| ]*\r
提取信息中的網(wǎng)絡(luò)鏈接：(h|H)(r|R)(e|E)(f|F) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?
提取信息中的郵件地址：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
提取信息中的圖片鏈接：(s|S)(r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?
提取信息中的 IP 地址：(\d+)\.(\d+)\.(\d+)\.(\d+)
提取信息中的中國(guó)手機(jī)號(hào)碼：(86)*0*13\d{9}
提取信息中的中國(guó)固定電話號(hào)碼：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{8}
提取信息中的中國(guó)電話號(hào)碼（包括移動(dòng)和固定電話）：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{7,14}
提取信息中的中國(guó)郵政編碼：[1-9]{1}(\d+){5}
提取信息中的浮點(diǎn)數(shù)（即小數(shù)）：(-?\d*)\.?\d+
提取信息中的任何數(shù)字 ：(-?\d*)(\.\d+)?
IP：(\d+)\.(\d+)\.(\d+)\.(\d+)
電話區(qū)號(hào)：^0\d{2,3}$
騰訊 QQ 號(hào)：^[1-9]*[1-9][0-9]*$
帳號(hào)（字母開(kāi)頭，允許 5-16 字節(jié)，允許字母數(shù)字下劃線）：^[a-zA-Z][a-zA-Z0-9_]{4,15}$
中文、英文、數(shù)字及下劃線：^[\u4e00-\u9fa5_a-zA-Z0-9]+$
91、原生JavaScript實(shí)現(xiàn)窗體改變事件resize的操作（兼容所以的瀏覽器）
(function(){var fn = function(){var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth,r = 1255,b = Element.extend(document.body),classname = b.className;if(w < r){//當(dāng)窗體的寬度小于1255的時(shí)候執(zhí)行相應(yīng)的操作}else{//當(dāng)窗體的寬度大于1255的時(shí)候執(zhí)行相應(yīng)的操作}}if(window.addEventListener){window.addEventListener('resize', function(){ fn(); });}else if(window.attachEvent){window.attachEvent('onresize', function(){ fn(); });}fn();
})();
92、原生JavaScript用正則清除空格分左右
function ltrim(s){ return s.replace( /^(\s*| *)/, ""); }
function rtrim(s){ return s.replace( /(\s*| *)$/, ""); }
function trim(s){ return ltrim(rtrim(s));}
93、原生JavaScript判斷變量是否空值
/*** 判斷變量是否空值* undefined, null, '', false, 0, [], {} 均返回true，否則返回false*/
function empty(v){switch (typeof v){case 'undefined' : return true;case 'string' : if(trim(v).length == 0) return true; break;case 'boolean' : if(!v) return true; break;case 'number' : if(0 === v) return true; break;case 'object' : if(null === v) return true;if(undefined !== v.length && v.length==0) return true;for(var k in v){return false;} return true;break;}return false;
}
94、原生JavaScript實(shí)現(xiàn)base64解碼
function base64_decode(data){var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = [];if (!data) { return data; }data += '';do { h1 = b64.indexOf(data.charAt(i++));h2 = b64.indexOf(data.charAt(i++));h3 = b64.indexOf(data.charAt(i++));h4 = b64.indexOf(data.charAt(i++));bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;o1 = bits >> 16 & 0xff;o2 = bits >> 8 & 0xff;o3 = bits & 0xff;if (h3 == 64) {tmp_arr[ac++] = String.fromCharCode(o1);} else if (h4 == 64) {tmp_arr[ac++] = String.fromCharCode(o1, o2);} else {tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);}} while (i < data.length);dec = tmp_arr.join('');dec = utf8_decode(dec);return dec;
}
95、原生JavaScript實(shí)現(xiàn)utf8解碼
function utf8_decode(str_data){var tmp_arr = [],i = 0,ac = 0,c1 = 0,c2 = 0,c3 = 0;str_data += '';while (i < str_data.length) {c1 = str_data.charCodeAt(i);if (c1 < 128) {tmp_arr[ac++] = String.fromCharCode(c1);i++;} else if (c1 > 191 && c1 < 224) { c2 = str_data.charCodeAt(i + 1);tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));i += 2;} else {c2 = str_data.charCodeAt(i + 1);c3 = str_data.charCodeAt(i + 2);tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));i += 3;}} return tmp_arr.join('');
}
96、原生JavaScript獲取窗體可見(jiàn)范圍的寬與高
function getViewSize(){var de=document.documentElement;var db=document.body;var viewW=de.clientWidth==0 ? db.clientWidth : de.clientWidth;var viewH=de.clientHeight==0 ? db.clientHeight : de.clientHeight;return Array(viewW ,viewH);
}
97、原生JavaScript判斷IE版本號(hào)（既簡(jiǎn)潔、又向后兼容！）
var _IE = (function(){var v = 3, div = document.createElement('div'), all = div.getElementsByTagName('i');while (div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->',all[0]);return v > 4 ? v : false ;
}());
98、原生JavaScript獲取瀏覽器版本號(hào)
function browserVersion(types) {var other = 1;for (i in types) {var v = types[i] ? types[i] : i;if (USERAGENT.indexOf(v) != -1) {var re = new RegExp(v + '(\\/|\\s|:)([\\d\\.]+)', 'ig');var matches = re.exec(USERAGENT);var ver = matches != null ? matches[2] : 0;other = ver !== 0 && v != 'mozilla' ? 0 : other;} else {var ver = 0;}eval('BROWSER.' + i + '= ver');}BROWSER.other = other;
}
99、原生JavaScript半角轉(zhuǎn)換為全角函數(shù)
function ToDBC(str){var result = '';for(var i=0; i < str.length; i++){code = str.charCodeAt(i);if(code >= 33 && code <= 126){result += String.fromCharCode(str.charCodeAt(i) + 65248);}else if (code == 32){result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32);}else{result += str.charAt(i);}}return result;
}
100、原生JavaScript全角轉(zhuǎn)換為半角函數(shù)
function ToCDB(str){var result = '';for(var i=0; i < str.length; i++){code = str.charCodeAt(i);if(code >= 65281 && code <= 65374){result += String.fromCharCode(str.charCodeAt(i) - 65248);}else if (code == 12288){result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);}else{result += str.charAt(i);}}return result;
}
作者： EricHu
出處： http://yonghu.blog.51cto.com/
Email:406590790@qq.com
QQ 交流：406590790 QQ群1：16653241
關(guān)于作者：高級(jí)工程師、信息系統(tǒng)項(xiàng)目管理師、DBA。專(zhuān)注于微軟平臺(tái)項(xiàng)目架構(gòu)、管理和企業(yè)解決方案，多年項(xiàng)目開(kāi)發(fā)與管理經(jīng)驗(yàn)，曾多次組織并開(kāi)發(fā)多個(gè)大型項(xiàng)目，精通DotNet，DB（SqlServer、Oracle等）技術(shù)。熟悉Java、Delhpi及Linux操作系統(tǒng)，有扎實(shí)的網(wǎng)絡(luò)知識(shí)。在面向?qū)ο蟆⒚嫦蚍?wù)以及數(shù)據(jù)庫(kù)領(lǐng)域有一定的造詣。現(xiàn)從事DB管理與開(kāi)發(fā)、WinForm、WCF、WebService、網(wǎng)頁(yè)數(shù)據(jù)抓取以及ASP.NET等項(xiàng)目管理、開(kāi)發(fā)、架構(gòu)等工作。如有問(wèn)題或建議，請(qǐng)多多賜教！本文版權(quán)歸作者和CSDN博客共有，歡迎轉(zhuǎn)載，但未經(jīng)作者同意必須保留此段聲明，且在文章頁(yè)面明顯位置給出原文連接，如有問(wèn)題，可以通過(guò)郵箱或QQ 聯(lián)系我，非常感謝。
轉(zhuǎn)載于:https://blog.51cto.com/yonghu/1346946
總結(jié)
以上是生活随笔 為你收集整理的原生态纯JavaScript 100大技巧大收集---你值得拥有 的全部?jī)?nèi)容，希望文章能夠幫你解決所遇到的問(wèn)題。
如果覺(jué)得生活随笔 網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔 推薦給好友。
