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JavaScript常用工具函数大全

【字号: 日期:2023-10-31 09:53:01浏览:14作者:猪猪

本文实例总结了JavaScript常用工具函数。分享给大家供大家参考,具体如下:

为元素添加on方法

Element.prototype.on = Element.prototype.addEventListener;NodeList.prototype.on = function (event, fn) {、 [][’forEach’].call(this, function (el) { el.on(event, fn); }); return this;};为元素添加trigger方法

Element.prototype.trigger = function(type, data) { var event = document.createEvent('HTMLEvents'); event.initEvent(type, true, true); event.data = data || {}; event.eventName = type; event.target = this; this.dispatchEvent(event); return this;};NodeList.prototype.trigger = function(event) { []['forEach'].call(this, function(el) { el['trigger'](event); }); return this;};转义html标签

function HtmlEncode(text) { return text .replace(/&/g, '&') .replace(/'/g, ’'’) .replace(/</g, '<') .replace(/>/g, '>');}HTML标签转义

// HTML 标签转义// @param {Array.<DOMString>} templateData 字符串类型的tokens// @param {...} ..vals 表达式占位符的运算结果tokens//function SaferHTML(templateData) { var s = templateData[0]; for (var i = 1; i < arguments.length; i++) { var arg = String(arguments[i]); // Escape special characters in the substitution. s += arg .replace(/&/g, '&amp;') .replace(/</g, '&lt;') .replace(/>/g, '&gt;'); // Don’t escape special characters in the template. s += templateData[i]; } return s;}// 调用var html = SaferHTML`<p>这是关于字符串模板的介绍</p>`;跨浏览器绑定事件

function addEventSamp(obj, evt, fn) { if (!oTarget) { return; } if (obj.addEventListener) { obj.addEventListener(evt, fn, false); } else if (obj.attachEvent) { obj.attachEvent('on' + evt, fn); } else { oTarget['on' + sEvtType] = fn; }}加入收藏夹

function addFavorite(sURL, sTitle) { try { window.external.addFavorite(sURL, sTitle); } catch (e) { try { window.sidebar.addPanel(sTitle, sURL, ''); } catch (e) { alert('加入收藏失败,请使用Ctrl+D进行添加'); } }}提取页面代码中所有网址

var aa = document.documentElement.outerHTML .match( /(url(|src=|href=)['’]*([^'’()<>[] ]+)['’)]*|(http://[w-.]+[^'’()<>[] ]+)/gi ) .join('rn') .replace(/^(src=|href=|url()['’]*|['’>) ]*$/gim, '');alert(aa);动态加载脚本文件

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.onloadDone = false; scriptNode.onload = function() { scriptNode.onloadDone = true; JSLOADED[src] = 1; }; scriptNode.onreadystatechange = function() { if ( (scriptNode.readyState == 'loaded' || scriptNode.readyState == 'complete') && !scriptNode.onloadDone ) { scriptNode.onloadDone = true; JSLOADED[src] = 1; } }; } else if (text) { scriptNode.text = text; } document.getElementsByTagName('head')[0].appendChild(scriptNode); } catch (e) {}}返回顶部的通用方法

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');实现base64解码

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;}确认是否是键盘有效输入值

function checkKey(iKey) { if (iKey == 32 || iKey == 229) { return true; } /*空格和异常*/ if (iKey > 47 && iKey < 58) { return true; } /*数字*/ if (iKey > 64 && iKey < 91) { return true; } /*字母*/ if (iKey > 95 && iKey < 108) { return true; } /*数字键盘1*/ if (iKey > 108 && iKey < 112) { return true; } /*数字键盘2*/ if (iKey > 185 && iKey < 193) { return true; } /*符号1*/ if (iKey > 218 && iKey < 223) { return true; } /*符号2*/ return false;}全角半角转换

//iCase: 0全到半,1半到全,其他不转化function chgCase(sStr, iCase) { if ( typeof sStr != 'string' || sStr.length <= 0 || !(iCase === 0 || iCase == 1) ) { return sStr; } var i, oRs = [], iCode; if (iCase) { /*半->全*/ for (i = 0; i < sStr.length; i += 1) { iCode = sStr.charCodeAt(i); if (iCode == 32) { iCode = 12288; } else if (iCode < 127) { iCode += 65248; } oRs.push(String.fromCharCode(iCode)); } } else { /*全->半*/ for (i = 0; i < sStr.length; i += 1) { iCode = sStr.charCodeAt(i); if (iCode == 12288) { iCode = 32; } else if (iCode > 65280 && iCode < 65375) { iCode -= 65248; } oRs.push(String.fromCharCode(iCode)); } } return oRs.join('');}版本对比

function compareVersion(v1, v2) { v1 = v1.split('.'); v2 = v2.split('.'); var len = Math.max(v1.length, v2.length); while (v1.length < len) { v1.push('0'); } while (v2.length < len) { v2.push('0'); } for (var i = 0; i < len; i++) { var num1 = parseInt(v1[i]); var num2 = parseInt(v2[i]); if (num1 > num2) { return 1; } else if (num1 < num2) { return -1; } } return 0;}压缩CSS样式代码

function compressCss(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];}获取当前路径

var currentPageUrl = '';if (typeof this.href === 'undefined') { currentPageUrl = document.location.toString().toLowerCase();} else { currentPageUrl = this.href.toString().toLowerCase();}字符串长度截取

function cutstr(str, len) { var temp, icount = 0, patrn = /[^x00-xff]/, 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 + '...'}时间日期格式转换

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;};// 或Date.prototype.format = function(format) { var o = { 'M+': this.getMonth() + 1, //month 'd+': this.getDate(), //day 'h+': this.getHours(), //hour 'm+': this.getMinutes(), //minute 's+': this.getSeconds(), //second 'q+': Math.floor((this.getMonth() + 3) / 3), //quarter S: this.getMilliseconds() //millisecond }; if (/(y+)/.test(format)) format = format.replace( RegExp.$1, (this.getFullYear() + '').substr(4 - RegExp.$1.length) ); for (var k in o) { if (new RegExp('(' + k + ')').test(format)) format = format.replace( RegExp.$1, RegExp.$1.length == 1 ? o[k] : ('00' + o[k]).substr(('' + o[k]).length) ); } return format;};alert(new Date().format('yyyy-MM-dd hh:mm:ss'));跨浏览器删除事件

function delEvt(obj, evt, fn) { if (!obj) { return; } if (obj.addEventListener) { obj.addEventListener(evt, fn, false); } else if (oTarget.attachEvent) { obj.attachEvent('on' + evt, fn); } else { obj['on' + evt] = fn; }}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;};返回脚本内容

function evalscript(s) { if (s.indexOf('<script') == -1) return s; var p = /<script[^>]*?>([^x00]*?)</script>/gi; var arr = []; while ((arr = p.exec(s))) { var p1 = /<script[^>]*?src='https://www.haobala.com/bcjs/([^>]*?)'[^>]*?(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;}格式化CSS样式代码

function formatCss(s) { //格式化代码 s = s.replace(/s*([{}:;,])s*/g, '$1'); s = s.replace(/;s*;/g, ';'); //清除连续分号 s = s.replace(/,[s.#d]*{/g, '{'); s = s.replace(/([^s]){([^s])/g, '$1 {nt$2'); s = s.replace(/([^s])}([^n]*)/g, '$1n}n$2'); s = s.replace(/([^s]);([^s}])/g, '$1;nt$2'); return s;}获取cookie值

function getCookie(name) { var arr = document.cookie.match(new RegExp('(^| )' + name + '=([^;]*)(;|$)')); if (arr != null) return unescape(arr[2]); return null;}获得URL中GET参数值

// 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 getGet() { querystr = window.location.href.split('?'); if (querystr[1]) { GETs = querystr[1].split('&'); GET = []; for (i = 0; i < GETs.length; i++) { tmp_arr = GETs.split('='); key = tmp_arr[0]; GET[key] = tmp_arr[1]; } } return querystr[1];}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;}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);}获取页面scrollLeft

function getPageScrollLeft() { var a = document; return a.documentElement.scrollLeft || a.body.scrollLeft;}获取页面scrollTop

function getPageScrollTop() { var a = document; return a.documentElement.scrollTop || a.body.scrollTop;}获取页面可视高度

function getPageViewHeight() { var d = document, a = d.compatMode == 'BackCompat' ? d.body : d.documentElement; return a.clientHeight;}获取页面可视宽度

function getPageViewWidth() { var d = document, a = d.compatMode == 'BackCompat' ? d.body : d.documentElement; return a.clientWidth;}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);}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;}获取网页被卷去的位置

function getScrollXY() { return document.body.scrollTop ? { x: document.body.scrollLeft, y: document.body.scrollTop } : { x: document.documentElement.scrollLeft, y: document.documentElement.scrollTop };}获取URL上的参数

// 获取URL中的某参数值,不区分大小写// 获取URL中的某参数值,不区分大小写,// 默认是取’hash’里的参数,// 如果传其他参数支持取‘search’中的参数// @param {String} name 参数名称export function getUrlParam(name, type = 'hash') { let newName = name, reg = new RegExp('(^|&)' + newName + '=([^&]*)(&|$)', 'i'), paramHash = window.location.hash.split('?')[1] || '', paramSearch = window.location.search.split('?')[1] || '', param; type === 'hash' ? (param = paramHash) : (param = paramSearch); let result = param.match(reg); if (result != null) { return result[2].split('/')[0]; } return null;}检验URL链接是否有效

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; } }}获取窗体可见范围的宽与高

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);}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; }}判断是否安卓移动设备访问

function isAndroidMobileDevice() { return /android/i.test(navigator.userAgent.toLowerCase());}判断是否苹果移动设备访问

function isAppleMobileDevice() { return /iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase());}判断是否为数字类型

function isDigit(value) { var patrn = /^[0-9]*$/; if (patrn.exec(value) == null || value == '') { return false; } else { return true; }}是否是某类手机型号

// 用devicePixelRatio和分辨率判断const isIphonex = () => { // X XS, XS Max, XR const xSeriesConfig = [ { devicePixelRatio: 3, width: 375, height: 812 }, { devicePixelRatio: 3, width: 414, height: 896 }, { devicePixelRatio: 2, width: 414, height: 896 } ]; // h5 if (typeof window !== 'undefined' && window) { const isIOS = /iphone/gi.test(window.navigator.userAgent); if (!isIOS) return false; const { devicePixelRatio, screen } = window; const { width, height } = screen; return xSeriesConfig.some( item => item.devicePixelRatio === devicePixelRatio && item.width === width && item.height === height ); } return false;};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;}判断吗是否手机号码

function isMobileNumber(e) { var i = '134,135,136,137,138,139,150,151,152,157,158,159,187,188,147,182,183,184,178', n = '130,131,132,155,156,185,186,145,176', a = '133,153,180,181,189,177,173,170', o = e || '', r = o.substring(0, 3), d = o.substring(0, 4), s = !!/^1d{10}$/.test(o) && (n.indexOf(r) >= 0 ? '联通' : a.indexOf(r) >= 0 ? '电信' : '1349' == d ? '电信' : i.indexOf(r) >= 0 ? '移动' : '未知'); return s;}判断是否是移动设备访问

function isMobileUserAgent() { return /iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test( window.navigator.userAgent.toLowerCase() );}判断鼠标是否移出事件

function isMouseOut(e, handler) { if (e.type !== 'mouseout') { return false; } var reltg = e.relatedTarget ? e.relatedTarget : e.type === 'mouseout' ? e.toElement : e.fromElement; while (reltg && reltg !== handler) { reltg = reltg.parentNode; } return reltg !== handler;}判断是否Touch屏幕

function isTouchScreen() { return ( 'ontouchstart' in window || (window.DocumentTouch && document instanceof DocumentTouch) );}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)|(1dd)|([1-9]d)|d))b(/[-a-z0-9_:@&?=+,.!/~%$]*)?)$/i; if (regular.test(strUrl)) { return true; } else { return false; }}判断是否打开视窗

function isViewportOpen() { return !!document.getElementById('wixMobileViewport');}加载样式文件

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); }}替换地址栏

function locationReplace(url) { if (history.replaceState) { history.replaceState(null, document.title, url); history.go(0); } else { location.replace(url); }}解决offsetX兼容性问题

// 针对火狐不支持offsetX/Yfunction getOffset(e) { var target = e.target, // 当前触发的目标对象 eventCoord, pageCoord, offsetCoord; // 计算当前触发元素到文档的距离 pageCoord = getPageCoord(target); // 计算光标到文档的距离 eventCoord = { X: window.pageXOffset + e.clientX, Y: window.pageYOffset + e.clientY }; // 相减获取光标到第一个定位的父元素的坐标 offsetCoord = { X: eventCoord.X - pageCoord.X, Y: eventCoord.Y - pageCoord.Y }; return offsetCoord;}function getPageCoord(element) { var coord = { X: 0, Y: 0 }; // 计算从当前触发元素到根节点为止, // 各级 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;}打开一个窗体通用方法

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(); }}将键值对拼接成URL带参数

export default const fnParams2Url = obj=> { let aUrl = [] let fnAdd = function(key, value) { return key + ’=’ + value } for (var k in obj) { aUrl.push(fnAdd(k, obj[k])) } return encodeURIComponent(aUrl.join(’&’)) }去掉url前缀

function removeUrlPrefix(a) { a = a .replace(/:/g, ':') .replace(/./g, '.') .replace(///g, '/'); while ( trim(a) .toLowerCase() .indexOf('http://') == 0 ) { a = trim(a.replace(/http:///i, '')); } return a;}替换全部

String.prototype.replaceAll = function(s1, s2) { return this.replace(new RegExp(s1, 'gm'), s2);};resize的操作

(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) { //当窗体的宽度小于1255的时候执行相应的操作 } else { //当窗体的宽度大于1255的时候执行相应的操作 } }; if (window.addEventListener) { window.addEventListener('resize', function() { fn(); }); } else if (window.attachEvent) { window.attachEvent('onresize', function() { fn(); }); } fn();})();滚动到顶部

// 使用document.documentElement.scrollTop 或 document.body.scrollTop 获取到顶部的距离,从顶部// 滚动一小部分距离。使用window.requestAnimationFrame()来滚动。// @example// scrollToTop();function scrollToTop() { var c = document.documentElement.scrollTop || document.body.scrollTop; if (c > 0) { window.requestAnimationFrame(scrollToTop); window.scrollTo(0, c - c / 8); }}设置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;';}设为首页

function setHomepage() { if (document.all) { document.body.style.behavior = 'url(#default#homepage)'; document.body.setHomePage('http://w3cboy.com'); } 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', 'http://w3cboy.com'); }}按字母排序,对每行进行数组排序

function setSort() { var text = K1.value .split(/[rn]/) .sort() .join('rn'); //顺序 var test = K1.value .split(/[rn]/) .sort() .reverse() .join('rn'); //反序 K1.value = K1.value != text ? text : test;}延时执行

// 比如 sleep(1000) 意味着等待1000毫秒,还可从 Promise、Generator、Async/Await 等角度实现。// Promiseconst sleep = time => { return new Promise(resolve => setTimeout(resolve, time));};sleep(1000).then(() => { console.log(1);});// Generatorfunction* sleepGenerator(time) { yield new Promise(function(resolve, reject) { setTimeout(resolve, time); });}sleepGenerator(1000) .next() .value.then(() => { console.log(1); });//asyncfunction sleep(time) { return new Promise(resolve => setTimeout(resolve, time));}async function output() { let out = await sleep(1000); console.log(1); return out;}output();function sleep(callback, time) { if (typeof callback === 'function') { setTimeout(callback, time); }}function output() { console.log(1);}sleep(output, 1000);判断是否以某个字符串开头

String.prototype.startWith = function(s) { return this.indexOf(s) == 0;};清除脚本内容

function stripscript(s) { return s.replace(/<script.*?>.*?</script>/gi, '');}时间个性化输出功能

/*1、< 60s, 显示为“刚刚”2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”5、>= 1year, 显示具体日期“XXXX年XX月XX日 XX:XX”*/function timeFormat(time) { var date = new Date(time), curDate = new Date(), year = date.getFullYear(), month = date.getMonth() + 10, day = date.getDate(), hour = date.getHours(), minute = date.getMinutes(), curYear = curDate.getFullYear(), curHour = curDate.getHours(), timeStr; if (year < curYear) { timeStr = year + '年' + month + '月' + day + '日 ' + hour + ':' + minute; } else { var pastTime = curDate - date, pastH = pastTime / 3600000; if (pastH > curHour) { timeStr = month + '月' + day + '日 ' + hour + ':' + minute; } else if (pastH >= 1) { timeStr = '今天 ' + hour + ':' + minute + '分'; } else { var pastM = curDate.getMinutes() - minute; if (pastM > 1) { timeStr = pastM + '分钟前'; } else { timeStr = '刚刚'; } } } return timeStr;}全角转换为半角函数

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;}半角转换为全角函数

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;}金额大写转换函数

function transform(tranvalue) { try { var i = 1; var dw2 = new Array('', '万', '亿'); //大单位 var dw1 = new Array('拾', '佰', '仟'); //小单位 var dw = new Array( '零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖' ); //整数部分用 //以下是小写转换成大写显示在合计大写的文本框中 //分离整数与小数 var source = splits(tranvalue); var num = source[0]; var dig = source[1]; //转换整数部分 var k1 = 0; //计小单位 var k2 = 0; //计大单位 var sum = 0; var str = ''; var len = source[0].length; //整数的长度 for (i = 1; i <= len; i++) { var n = source[0].charAt(len - i); //取得某个位数上的数字 var bn = 0; if (len - i - 1 >= 0) { bn = source[0].charAt(len - i - 1); //取得某个位数前一位上的数字 } sum = sum + Number(n); if (sum != 0) { str = dw[Number(n)].concat(str); //取得该数字对应的大写数字,并插入到str字符串的前面 if (n == '0') sum = 0; } if (len - i - 1 >= 0) { //在数字范围内 if (k1 != 3) { //加小单位 if (bn != 0) { str = dw1[k1].concat(str); } k1++; } else { //不加小单位,加大单位 k1 = 0; var temp = str.charAt(0); if (temp == '万' || temp == '亿') //若大单位前没有数字则舍去大单位 str = str.substr(1, str.length - 1); str = dw2[k2].concat(str); sum = 0; } } if (k1 == 3) { //小单位到千则大单位进一 k2++; } } //转换小数部分 var strdig = ''; if (dig != '') { var n = dig.charAt(0); if (n != 0) { strdig += dw[Number(n)] + '角'; //加数字 } var n = dig.charAt(1); if (n != 0) { strdig += dw[Number(n)] + '分'; //加数字 } } str += '元' + strdig; } catch (e) { return '0元'; } return str;}//拆分整数与小数function splits(tranvalue) { var value = new Array('', ''); temp = tranvalue.split('.'); for (var i = 0; i < temp.length; i++) { value = temp; } return value;}清除空格

String.prototype.trim = function() { var reExtraSpace = /^s*(.*?)s+$/; return this.replace(reExtraSpace, '$1');};// 清除左空格function ltrim(s) { return s.replace(/^(s*| *)/, '');}// 清除右空格function rtrim(s) { return s.replace(/(s*| *)$/, '');}随机数时间戳

function uniqueId() { var a = Math.random, b = parseInt; return ( Number(new Date()).toString() + b(10 * a()) + b(10 * a()) + b(10 * a()) );}实现utf8解码

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('');}

以下是Puxiao投稿推荐的几个函数,用作常见的输入值校验和替换操作,主要针对中国大陆地区的校验规则:

校验是否为一个数字,以及该数字小数点位数是否与参数floats一致

校验规则:

若参数floats有值,则校验该数字小数点后的位数。 若参数floats没有值,则仅仅校验是否为数字。

function isNum(value,floats=null){ let regexp = new RegExp(`^[1-9][0-9]*.[0-9]{${floats}}$|^0.[0-9]{${floats}}$`); return typeof value === ’number’ && floats?regexp.test(String(value)):true;}

function anysicIntLength(minLength,maxLength){ let result_str = ’’; if(minLength){ switch(maxLength){ case undefined: result_str = result_str.concat(`{${minLength-1}}`); break; case null: result_str = result_str.concat(`{${minLength-1},}`); break; default: result_str = result_str.concat(`{${minLength-1},${maxLength-1}}`); } }else{ result_str = result_str.concat(’*’); } return result_str;}校验是否为非零的正整数

function isInt(value,minLength=null,maxLength=undefined){ if(!isNum(value)) return false; let regexp = new RegExp(`^-?[1-9][0-9]${anysicIntLength(minLength,maxLength)}$`); return regexp.test(value.toString());}校验是否为非零的正整数

function isPInt(value,minLength=null,maxLength=undefined) { if(!isNum(value)) return false; let regexp = new RegExp(`^[1-9][0-9]${anysicIntLength(minLength,maxLength)}$`); return regexp.test(value.toString());}校验是否为非零的负整数

function isNInt(value,minLength=null,maxLength=undefined){ if(!isNum(value)) return false; let regexp = new RegExp(`^-[1-9][0-9]${anysicIntLength(minLength,maxLength)}$`); return regexp.test(value.toString());}校验整数是否在取值范围内

校验规则:

minInt为在取值范围中最小的整数 maxInt为在取值范围中最大的整数

function checkIntRange(value,minInt,maxInt=9007199254740991){ return Boolean(isInt(value) && (Boolean(minInt!=undefined && minInt!=null)?value>=minInt:true) && (value<=maxInt));}校验是否为中国大陆手机号

function isTel(value) { return /^1[3,4,5,6,7,8,9][0-9]{9}$/.test(value.toString());}校验是否为中国大陆传真或固定电话号码

function isFax(str) { return /^([0-9]{3,4})?[0-9]{7,8}$|^([0-9]{3,4}-)?[0-9]{7,8}$/.test(str);}校验是否为邮箱地址

function isEmail(str) { return /^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(.[a-zA-Z0-9_-]+)+$/.test(str);}校验是否为QQ号码

校验规则:

非0开头的5位-13位整数

function isQQ(value) { return /^[1-9][0-9]{4,12}$/.test(value.toString());}校验是否为网址

校验规则:

以https://、http://、ftp://、rtsp://、mms://开头、或者没有这些开头 可以没有www开头(或其他二级域名),仅域名 网页地址中允许出现/%*?@&等其他允许的符号

function isURL(str) { return /^(https://|http://|ftp://|rtsp://|mms://)?[a-zA-Z0-9_-]+(.[a-zA-Z0-9_-]+)+[/=?%-&_~`@[]’:+!]*([^<>''])*$/.test(str);}校验是否为不含端口号的IP地址

校验规则:

IP格式为xxx.xxx.xxx.xxx,每一项数字取值范围为0-255 除0以外其他数字不能以0开头,比如02

function isIP(str) { return /^((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9]).){3}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])$/.test(str);}校验是否为IPv6地址

校验规则:

支持IPv6正常格式 支持IPv6压缩格式

function isIPv6(str){ return Boolean(str.match(/:/g)?str.match(/:/g).length<=7:false && /::/.test(str)?/^([da-f]{1,4}(:|::)){1,6}[da-f]{1,4}$/i.test(str):/^([da-f]{1,4}:){7}[da-f]{1,4}$/i.test(str));}校验是否为中国大陆第二代居民身份证

校验规则:

共18位,最后一位可为X(大小写均可) 不能以0开头 出生年月日会进行校验:年份只能为18/19/2*开头,月份只能为01-12,日只能为01-31

function isIDCard(str){ return /^[1-9][0-9]{5}(18|19|(2[0-9]))[0-9]{2}((0[1-9])|(10|11|12))(([0-2][1-9])|10|20|30|31)[0-9]{3}[0-9Xx]$/.test(str);}校验是否为中国大陆邮政编码

参数value为数字或字符串

校验规则:

共6位,且不能以0开头

function isPostCode(value){ return /^[1-9][0-9]{5}$/.test(value.toString());}校验两个参数是否完全相同,包括类型

校验规则:

值相同,数据类型也相同

function same(firstValue,secondValue){ return firstValue===secondValue;}校验字符的长度是否在规定的范围内

校验规则:

minInt为在取值范围中最小的长度 maxInt为在取值范围中最大的长度

function lengthRange(str,minLength,maxLength=9007199254740991) { return Boolean(str.length >= minLength && str.length <= maxLength);}校验字符是否以字母开头

校验规则:

必须以字母开头 开头的字母不区分大小写

function letterBegin(str){ return /^[A-z]/.test(str);}校验字符是否为纯数字(整数)

校验规则:

字符全部为正整数(包含0) 可以以0开头

function pureNum(str) { return /^[0-9]*$/.test(str);}

function anysicPunctuation(str){ if(!str) return null; let arr = str.split(’’).map(item => { return item = ’’ + item; }); return arr.join(’|’);}

function getPunctuation(str){ return anysicPunctuation(str) || ’~|`|!|@|#|$|%|^|&|*|(|)|-|_|+|=||||[|]|{|}|;|:|'|’|,|<|.|>|/|?’;}

function getExcludePunctuation(str){ let regexp = new RegExp(`[${anysicPunctuation(str)}]`,’g’); return getPunctuation(’ ~`!@#$%^&*()-_+=[]{};:'’,<.>/?’.replace(regexp,’’));}返回字符串构成种类(字母,数字,标点符号)的数量

LIP缩写的由来:L(letter 字母) + I(uint 数字) + P(punctuation 标点符号)

参数punctuation的说明:

punctuation指可接受的标点符号集 若需自定义符号集,例如“仅包含中划线和下划线”,将参数设置为'-_'即可 若不传值或默认为null,则内部默认标点符号集为除空格外的其他英文标点符号:~`!@#$%^&*()-_+=[]{};:'’,<.>/?

function getLIPTypes(str,punctuation=null){ let p_regexp = new RegExp(’[’+getPunctuation(punctuation)+’]’); return /[A-z]/.test(str) + /[0-9]/.test(str) + p_regexp.test(str);}校验字符串构成的种类数量是否大于或等于参数num的值。 通常用来校验用户设置的密码复杂程度。

校验规则:

参数num为需要构成的种类(字母、数字、标点符号),该值只能是1-3。 默认参数num的值为1,即表示:至少包含字母,数字,标点符号中的1种 若参数num的值为2,即表示:至少包含字母,数字,标点符号中的2种 若参数num的值为3,即表示:必须同时包含字母,数字,标点符号 参数punctuation指可接受的标点符号集,具体设定可参考getLIPTypes()方法中关于标点符号集的解释。

function pureLIP(str,num=1,punctuation=null){ let regexp = new RegExp(`[^A-z0-9|${getPunctuation(punctuation)}]`); return Boolean(!regexp.test(str) && getLIPTypes(str,punctuation)>= num);}清除所有空格

function clearSpaces(str){ return str.replace(/[ ]/g,’’);}清除所有中文字符(包括中文标点符号)

function clearCNChars(str){ return str.replace(/[u4e00-u9fa5]/g,’’);}清除所有中文字符及空格

function clearCNCharsAndSpaces(str){ return str.replace(/[u4e00-u9fa5 ]/g,’’);}除保留标点符号集以外,清除其他所有英文的标点符号(含空格)

全部英文标点符号为: ~`!@#$%^&*()-_+=[]{};:'’,<.>/?

参数excludePunctuation指需要保留的标点符号集,例如若传递的值为’_’,即表示清除_以外的其他所有英文标点符号。

function clearPunctuation(str,excludePunctuation=null){ let regexp = new RegExp(`[${getExcludePunctuation(excludePunctuation)}]`,’g’); return str.replace(regexp,’’);}校验是否包含空格

function haveSpace(str) { return /[ ]/.test(str);}校验是否包含中文字符(包括中文标点符号)

function haveCNChars(str){ return /[u4e00-u9fa5]/.test(str);}

感兴趣的朋友可以使用在线HTML/CSS/JavaScript代码运行工具:http://tools.jb51.net/code/HtmlJsRun测试上述代码运行效果。

更多关于JavaScript相关内容可查看本站专题:《JavaScript常用函数技巧汇总》、《javascript面向对象入门教程》、《JavaScript错误与调试技巧总结》、《JavaScript数据结构与算法技巧总结》及《JavaScript数学运算用法总结》

希望本文所述对大家JavaScript程序设计有所帮助。

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