JavaScript常用工具函式大全
阿新 • • 發佈:2020-05-07
本文例項總結了JavaScript常用工具函式。分享給大家供大家參考,具體如下:
為元素新增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; };
為元素新增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; };
轉義html標籤
function HtmlEncode(text) { return text .replace(/&/g,"&") .replace(/\"/g,'"') .replace(/</g,"<") .replace(/>/g,">"); }
HTML標籤轉義
// HTML 標籤轉義 // @param {Array.<DOMString>} templateData 字串型別的tokens // @param {...} ..vals 表示式佔位符的運算結果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,"&") .replace(/</g,"<") .replace(/>/g,">"); // Don't escape special characters in the template. s += templateData[i]; } return s; } // 呼叫 var html = SaferHTML`<p>這是關於字串模板的介紹</p>`;
跨瀏覽器繫結事件
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,請使用Ctrl+D進行新增"); } } }
提取頁面程式碼中所有網址
var aa = document.documentElement.outerHTML .match( /(url\(|src=|href=)[\"\']*([^\"\'\(\)\<\>\[\] ]+)[\"\'\)]*|(http:\/\/[\w\-\.]+[^\"\'\(\)\<\>\[\] ]+)/gi ) .join("\r\n") .replace(/^(src=|href=|url\()[\"\']*|[\"\'\>\) ]*$/gim,""); alert(aa);
動態載入指令碼檔案
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");
實現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,o3); } } while (i < data.length); dec = tmp_arr.join(""); dec = utf8_decode(dec); return dec; }
確認是否是鍵盤有效輸入值
function checkKey(iKey) { if (iKey == 32 || iKey == 229) { return true; } /*空格和異常*/ if (iKey > 47 && iKey < 58) { return true; } /*數字*/ if (iKey > 64 && iKey < 91) { return true; } /*字母*/ if (iKey > 95 && iKey < 108) { return true; } /*數字鍵盤1*/ if (iKey > 108 && iKey < 112) { return true; } /*數字鍵盤2*/ if (iKey > 185 && iKey < 193) { return true; } /*符號1*/ if (iKey > 218 && iKey < 223) { return true; } /*符號2*/ return false; }
全形半形轉換
//iCase: 0全到半,1半到全,其他不轉化 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(""); }
版本對比
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; }
壓縮CSS樣式程式碼
function compressCss(s) { //壓縮程式碼 s = s.replace(/\/\*(.|\n)*?\*\//g,""); //刪除註釋 s = s.replace(/\s*([\{\}\:\;\,])\s*/g,"$1"); s = s.replace(/\,[\s\.\#\d]*\{/g,"{"); //容錯處理 s = s.replace(/;\s*;/g,";"); //清除連續分號 s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白 return s == null ? "" : s[1]; }
獲取當前路徑
var currentPageUrl = ""; if (typeof this.href === "undefined") { currentPageUrl = document.location.toString().toLowerCase(); } else { currentPageUrl = this.href.toString().toLowerCase(); }
字串長度擷取
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 + "..." }
時間日期格式轉換
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; }; // 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"));
跨瀏覽器刪除事件
function delEvt(obj,fn) { if (!obj) { return; } if (obj.addEventListener) { obj.addEventListener(evt,false); } else if (oTarget.attachEvent) { obj.attachEvent("on" + evt,fn); } else { obj["on" + evt] = fn; } }
判斷是否以某個字串結束
String.prototype.endWith = function(s) { var d = this.length - s.length; return d >= 0 && this.lastIndexOf(s) == d; };
返回指令碼內容
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=\"([^\>]*?)\"[^\>]*?(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[1].indexOf("reload=") != -1); } } return s; }
格式化CSS樣式程式碼
function formatCss(s) { //格式化程式碼 s = s.replace(/\s*([\{\}\:\;\,"$1"); s = s.replace(/;\s*;/g,";"); //清除連續分號 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$2"); return s; }
獲取cookie值
function getCookie(name) { var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)")); if (arr != null) return unescape(arr[2]); return null; }
獲得URL中GET引數值
// 用法:如果地址是 test.htm?t1=1&t2=2&t3=3,那麼能取得: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]; }
獲取移動裝置初始化大小
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; }
獲取頁面高度
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); }
獲取頁面scrollLeft
function getPageScrollLeft() { var a = document; return a.documentElement.scrollLeft || a.body.scrollLeft; }
獲取頁面scrollTop
function getPageScrollTop() { var a = document; return a.documentElement.scrollTop || a.body.scrollTop; }
獲取頁面可視高度
function getPageViewHeight() { var d = document,a = d.compatMode == "BackCompat" ? d.body : d.documentElement; return a.clientHeight; }
獲取頁面可視寬度
function getPageViewWidth() { var d = document,a = d.compatMode == "BackCompat" ? d.body : d.documentElement; return a.clientWidth; }
獲取頁面寬度
function getPageWidth() { var g = document,d = g.compatMode == "BackCompat" ? a : g.documentElement; return Math.max(f.scrollWidth,a.scrollWidth,d.clientWidth); }
獲取移動裝置螢幕寬度
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; }
獲取網頁被捲去的位置
function getScrollXY() { return document.body.scrollTop ? { x: document.body.scrollLeft,y: document.body.scrollTop } : { x: document.documentElement.scrollLeft,y: document.documentElement.scrollTop }; }
獲取URL上的引數
// 獲取URL中的某引數值,不區分大小寫 // 獲取URL中的某引數值,不區分大小寫,// 預設是取'hash'裡的引數, // 如果傳其他引數支援取‘search'中的引數 // @param {String} name 引數名稱 export function getUrlParam(name,type = "hash") { let newName = name,reg = new RegExp("(^|&)" + newName + "=([^&]*)(&|$)","i"),paramHash = window.location.hash.split("?")[1] || "",paramSearch = window.location.search.split("?")[1] || "",param; type === "hash" ? (param = paramHash) : (param = paramSearch); let result = param.match(reg); if (result != null) { return result[2].split("/")[0]; } return null; }
檢驗URL連結是否有效
function getUrlState(URL) { var xmlhttp = new ActiveXObject("microsoft.xmlhttp"); xmlhttp.Open("GET",URL,false); try { xmlhttp.Send(); } catch (e) { } finally { var result = xmlhttp.responseText; if (result) { if (xmlhttp.Status == 200) { return true; } else { return false; } } else { return false; } } }
獲取窗體可見範圍的寬與高
function getViewSize() { var de = document.documentElement; var db = document.body; var viewW = de.clientWidth == 0 ? db.clientWidth : de.clientWidth; var viewH = de.clientHeight == 0 ? db.clientHeight : de.clientHeight; return Array(viewW,viewH); }
獲取移動裝置最大化大小
function getZoom() { var screenWidth = Math.abs(window.orientation) === 90 ? Math.max(screen.height,screen.width) : Math.min(screen.height,screen.width); if (this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()) { screenWidth = screenWidth / window.devicePixelRatio; } var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment === "New" || FixViewPortsExperiment === "new"); if (FixViewPortsExperimentRunning) { return screenWidth / window.innerWidth; } else { return screenWidth / document.body.offsetWidth; } }
判斷是否安卓移動裝置訪問
function isAndroidMobileDevice() { return /android/i.test(navigator.userAgent.toLowerCase()); }
判斷是否蘋果移動裝置訪問
function isAppleMobileDevice() { return /iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()); }
判斷是否為數字型別
function isDigit(value) { var patrn = /^[0-9]*$/; if (patrn.exec(value) == null || value == "") { return false; } else { return true; } }
是否是某類手機型號
// 用devicePixelRatio和解析度判斷 const isIphonex = () => { // X XS,XS Max,XR const xSeriesConfig = [ { devicePixelRatio: 3,width: 375,height: 812 },{ devicePixelRatio: 3,width: 414,height: 896 },{ devicePixelRatio: 2,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; };
判斷是否移動裝置
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; }
判斷嗎是否手機號碼
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 = !!/^1\d{10}$/.test(o) && (n.indexOf(r) >= 0 ? "聯通" : a.indexOf(r) >= 0 ? "電信" : "1349" == d ? "電信" : i.indexOf(r) >= 0 ? "移動" : "未知"); return s; }
判斷是否是移動裝置訪問
function isMobileUserAgent() { return /iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test( window.navigator.userAgent.toLowerCase() ); }
判斷滑鼠是否移出事件
function isMouseOut(e,handler) { if (e.type !== "mouseout") { return false; } var reltg = e.relatedTarget ? e.relatedTarget : e.type === "mouseout" ? e.toElement : e.fromElement; while (reltg && reltg !== handler) { reltg = reltg.parentNode; } return reltg !== handler; }
判斷是否Touch螢幕
function isTouchScreen() { return ( "ontouchstart" in window || (window.DocumentTouch && document instanceof DocumentTouch) ); }
判斷是否為網址
function isURL(strUrl) { var regular = /^\b(((https?|ftp):\/\/)?[-a-z0-9]+(\.[-a-z0-9]+)*\.(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|[a-z][a-z]|((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d))\b(\/[-a-z0-9_:\@&?=+,.!\/~%\$]*)?)$/i; if (regular.test(strUrl)) { return true; } else { return false; } }
判斷是否開啟視窗
function isViewportOpen() { return !!document.getElementById("wixMobileViewport"); }
載入樣式檔案
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); } }
替換位址列
function locationReplace(url) { if (history.replaceState) { history.replaceState(null,document.title,url); history.go(0); } else { location.replace(url); } }
解決offsetX相容性問題
// 針對火狐不支援offsetX/Y function getOffset(e) { var target = e.target,// 當前觸發的目標物件 eventCoord,pageCoord,offsetCoord; // 計算當前觸發元素到文件的距離 pageCoord = getPageCoord(target); // 計算游標到文件的距離 eventCoord = { X: window.pageXOffset + e.clientX,Y: window.pageYOffset + e.clientY }; // 相減獲取游標到第一個定位的父元素的座標 offsetCoord = { X: eventCoord.X - pageCoord.X,Y: eventCoord.Y - pageCoord.Y }; return offsetCoord; } function getPageCoord(element) { var coord = { X: 0,Y: 0 }; // 計算從當前觸發元素到根節點為止, // 各級 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; }
開啟一個窗體通用方法
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,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(); } }
將鍵值對拼接成URL帶引數
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字首
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; }
替換全部
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) { //當窗體的寬度小於1255的時候執行相應的操作 } else { //當窗體的寬度大於1255的時候執行相應的操作 } }; if (window.addEventListener) { window.addEventListener("resize",function() { fn(); }); } else if (window.attachEvent) { window.attachEvent("onresize",function() { fn(); }); } fn(); })();
滾動到頂部
// 使用document.documentElement.scrollTop 或 document.body.scrollTop 獲取到頂部的距離,從頂部 // 滾動一小部分距離。使用window.requestAnimationFrame()來滾動。 // @example // scrollToTop(); function scrollToTop() { var c = document.documentElement.scrollTop || document.body.scrollTop; if (c > 0) { window.requestAnimationFrame(scrollToTop); window.scrollTo(0,c - c / 8); } }
設定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;"; }
設為首頁
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( "該操作被瀏覽器拒絕,如果想啟用該功能,請在位址列內輸入 about:config,然後將項 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://w3cboy.com"); } }
按字母排序,對每行進行陣列排序
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; }
延時執行
// 比如 sleep(1000) 意味著等待1000毫秒,還可從 Promise、Generator、Async/Await 等角度實現。 // Promise const sleep = time => { return new Promise(resolve => setTimeout(resolve,time)); }; sleep(1000).then(() => { console.log(1); }); // Generator function* sleepGenerator(time) { yield new Promise(function(resolve,reject) { setTimeout(resolve,time); }); } sleepGenerator(1000) .next() .value.then(() => { console.log(1); }); //async function 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);
判斷是否以某個字串開頭
String.prototype.startWith = function(s) { return this.indexOf(s) == 0; };
清除指令碼內容
function stripscript(s) { return s.replace(/<script.*?>.*?<\/script>/gi,""); }
時間個性化輸出功能
/* 1、< 60s,顯示為“剛剛” 2、>= 1min && < 60 min,顯示與當前時間差“XX分鐘前” 3、>= 60min && < 1day,顯示與當前時間差“今天 XX:XX” 4、>= 1day && < 1year,顯示日期“XX月XX日 XX:XX” 5、>= 1year,顯示具體日期“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 + "分鐘前"; } else { timeStr = "剛剛"; } } } return timeStr; }
全形轉換為半形函式
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; }
半形轉換為全形函式
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; }
金額大寫轉換函式
function transform(tranvalue) { try { var i = 1; var dw2 = new Array("","萬","億"); //大單位 var dw1 = new Array("拾","佰","仟"); //小單位 var dw = new Array( "零","壹","貳","叄","肆","伍","陸","柒","捌","玖" ); //整數部分用 //以下是小寫轉換成大寫顯示在合計大寫的文字框中 //分離整數與小數 var source = splits(tranvalue); var num = source[0]; var dig = source[1]; //轉換整數部分 var k1 = 0; //計小單位 var k2 = 0; //計大單位 var sum = 0; var str = ""; var len = source[0].length; //整數的長度 for (i = 1; i <= len; i++) { var n = source[0].charAt(len - i); //取得某個位數上的數字 var bn = 0; if (len - i - 1 >= 0) { bn = source[0].charAt(len - i - 1); //取得某個位數前一位上的數字 } sum = sum + Number(n); if (sum != 0) { str = dw[Number(n)].concat(str); //取得該數字對應的大寫數字,並插入到str字串的前面 if (n == "0") sum = 0; } if (len - i - 1 >= 0) { //在數字範圍內 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" || temp == "億") //若大單位前沒有數字則捨去大單位 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一 k2++; } } //轉換小數部分 var strdig = ""; if (dig != "") { var n = dig.charAt(0); if (n != 0) { strdig += dw[Number(n)] + "角"; //加數字 } var n = dig.charAt(1); if (n != 0) { strdig += dw[Number(n)] + "分"; //加數字 } } str += "元" + strdig; } catch (e) { return "0元"; } return str; } //拆分整數與小數 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,"$1"); }; // 清除左空格 function ltrim(s) { return s.replace(/^(\s*| *)/,""); } // 清除右空格 function rtrim(s) { return s.replace(/(\s*| *)$/,""); }
隨機數時間戳
function uniqueId() { var a = Math.random,b = parseInt; return ( Number(new Date()).toString() + b(10 * a()) + b(10 * a()) + b(10 * a()) ); }
實現utf8解碼
function utf8_decode(str_data) { var tmp_arr = [],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投稿推薦的幾個函式,用作常見的輸入值校驗和替換操作,主要針對中國大陸地區的校驗規則:
校驗是否為一個數字,以及該數字小數點位數是否與引數floats一致
校驗規則:
- 若引數floats有值,則校驗該數字小數點後的位數。
- 若引數floats沒有值,則僅僅校驗是否為數字。
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; }
校驗是否為非零的正整數
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()); }
校驗是否為非零的正整數
function isPInt(value,maxLength=undefined) { if(!isNum(value)) return false; let regexp = new RegExp(`^[1-9][0-9]${anysicIntLength(minLength,maxLength)}$`); return regexp.test(value.toString()); }
校驗是否為非零的負整數
function isNInt(value,maxLength=undefined){ if(!isNum(value)) return false; let regexp = new RegExp(`^-[1-9][0-9]${anysicIntLength(minLength,maxLength)}$`); return regexp.test(value.toString()); }
校驗整數是否在取值範圍內
校驗規則:
- minInt為在取值範圍中最小的整數
- maxInt為在取值範圍中最大的整數
function checkIntRange(value,minInt,maxInt=9007199254740991){ return Boolean(isInt(value) && (Boolean(minInt!=undefined && minInt!=null)?value>=minInt:true) && (value<=maxInt)); }
校驗是否為中國大陸手機號
function isTel(value) { return /^1[3,4,5,6,7,8,9][0-9]{9}$/.test(value.toString()); }
校驗是否為中國大陸傳真或固定電話號碼
function isFax(str) { return /^([0-9]{3,4})?[0-9]{7,8}$|^([0-9]{3,4}-)?[0-9]{7,8}$/.test(str); }
校驗是否為郵箱地址
function isEmail(str) { return /^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/.test(str); }
校驗是否為QQ號碼
校驗規則:
- 非0開頭的5位-13位整數
function isQQ(value) { return /^[1-9][0-9]{4,12}$/.test(value.toString()); }
校驗是否為網址
校驗規則:
- 以https://、http://、ftp://、rtsp://、mms://開頭、或者沒有這些開頭
- 可以沒有www開頭(或其他二級域名),僅域名
- 網頁地址中允許出現/%*?@&等其他允許的符號
function isURL(str) { return /^(https:\/\/|http:\/\/|ftp:\/\/|rtsp:\/\/|mms:\/\/)?[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/.test(str); }
校驗是否為不含埠號的IP地址
校驗規則:
- IP格式為xxx.xxx.xxx.xxx,每一項數字取值範圍為0-255
- 除0以外其他數字不能以0開頭,比如02
function isIP(str) { return /^((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])\.){3}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])$/.test(str); }
校驗是否為IPv6地址
校驗規則:
- 支援IPv6正常格式
- 支援IPv6壓縮格式
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)); }
校驗是否為中國大陸第二代居民身份證
校驗規則:
- 共18位,最後一位可為X(大小寫均可)
- 不能以0開頭
- 出生年月日會進行校驗:年份只能為18/19/2*開頭,月份只能為01-12,日只能為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]$/.test(str); }
校驗是否為中國大陸郵政編碼
引數value為數字或字串
校驗規則:
- 共6位,且不能以0開頭
function isPostCode(value){ return /^[1-9][0-9]{5}$/.test(value.toString()); }
校驗兩個引數是否完全相同,包括型別
校驗規則:
- 值相同,資料型別也相同
function same(firstValue,secondValue){ return firstValue===secondValue; }
校驗字元的長度是否在規定的範圍內
校驗規則:
- minInt為在取值範圍中最小的長度
- maxInt為在取值範圍中最大的長度
function lengthRange(str,minLength,maxLength=9007199254740991) { return Boolean(str.length >= minLength && str.length <= maxLength); }
校驗字元是否以字母開頭
校驗規則:
- 必須以字母開頭
- 開頭的字母不區分大小寫
function letterBegin(str){ return /^[A-z]/.test(str); }
校驗字元是否為純數字(整數)
校驗規則:
- 字元全部為正整數(包含0)
- 可以以0開頭
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,'')); }
返回字串構成種類(字母,數字,標點符號)的數量
LIP縮寫的由來:L(letter 字母) + I(uint 數字) + P(punctuation 標點符號)
引數punctuation的說明:
- punctuation指可接受的標點符號集
- 若需自定義符號集,例如“僅包含中劃線和下劃線”,將引數設定為"-_"即可
- 若不傳值或預設為null,則內部預設標點符號集為除空格外的其他英文標點符號:~`!@#$%^&*()-_+=[]{};:"',<.>/?
function getLIPTypes(str,punctuation=null){ let p_regexp = new RegExp('['+getPunctuation(punctuation)+']'); return /[A-z]/.test(str) + /[0-9]/.test(str) + p_regexp.test(str); }
校驗字串構成的種類數量是否大於或等於引數num的值。 通常用來校驗使用者設定的密碼複雜程度。
校驗規則:
- 引數num為需要構成的種類(字母、數字、標點符號),該值只能是1-3。
- 預設引數num的值為1,即表示:至少包含字母,數字,標點符號中的1種
- 若引數num的值為2,即表示:至少包含字母,數字,標點符號中的2種
- 若引數num的值為3,即表示:必須同時包含字母,數字,標點符號
- 引數punctuation指可接受的標點符號集,具體設定可參考getLIPTypes()方法中關於標點符號集的解釋。
function pureLIP(str,num=1,punctuation=null){ let regexp = new RegExp(`[^A-z0-9|${getPunctuation(punctuation)}]`); return Boolean(!regexp.test(str) && getLIPTypes(str,punctuation)>= num); }
清除所有空格
function clearSpaces(str){ return str.replace(/[ ]/g,''); }
清除所有中文字元(包括中文標點符號)
function clearCNChars(str){ return str.replace(/[\u4e00-\u9fa5]/g,''); }
清除所有中文字元及空格
function clearCNCharsAndSpaces(str){ return str.replace(/[\u4e00-\u9fa5 ]/g,''); }
除保留標點符號集以外,清除其他所有英文的標點符號(含空格)
全部英文標點符號為: ~`!@#$%^&*()-_+=[]{};:"',<.>/?
引數excludePunctuation指需要保留的標點符號集,例如若傳遞的值為'_',即表示清除_以外的其他所有英文標點符號。
function clearPunctuation(str,excludePunctuation=null){ let regexp = new RegExp(`[${getExcludePunctuation(excludePunctuation)}]`,'g'); return str.replace(regexp,''); }
校驗是否包含空格
function haveSpace(str) { return /[ ]/.test(str); }
校驗是否包含中文字元(包括中文標點符號)
function haveCNChars(str){ return /[\u4e00-\u9fa5]/.test(str); }
感興趣的朋友可以使用線上HTML/CSS/JavaScript程式碼執行工具:http://tools.jb51.net/code/HtmlJsRun測試上述程式碼執行效果。
更多關於JavaScript相關內容可檢視本站專題:《JavaScript常用函式技巧彙總》、《javascript面向物件入門教程》、《JavaScript錯誤與除錯技巧總結》、《JavaScript資料結構與演算法技巧總結》及《JavaScript數學運算用法總結》
希望本文所述對大家JavaScript程式設計有所幫助。