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這篇文章給大家分享的是有關(guān)JS怎么實(shí)現(xiàn)Cookie讀、寫、刪除操作工具類的內(nèi)容。小編覺得挺實(shí)用的,因此分享給大家做個(gè)參考,一起跟隨小編過來看看吧。
1、能夠嵌入動(dòng)態(tài)文本于HTML頁面。2、對(duì)瀏覽器事件做出響應(yīng)。3、讀寫HTML元素。4、在數(shù)據(jù)被提交到服務(wù)器之前驗(yàn)證數(shù)據(jù)。5、檢測(cè)訪客的瀏覽器信息。6、控制cookies,包括創(chuàng)建和修改等。7、基于Node.js技術(shù)進(jìn)行服務(wù)器端編程。
本文實(shí)例講述了JS實(shí)現(xiàn)Cookie讀、寫、刪除操作工具類。分享給大家供大家參考,具體如下:
/*** *讀取指定的Cookie值 readCookie("id"); *@param {string} cookieName Cookie名稱 */ function readCookie(cookieName) { var theCookie = "" + document.cookie; var ind = theCookie.indexOf(cookieName); if(ind==-1 || cookieName=="") return ""; var ind1 = theCookie.indexOf(';',ind); if(ind1==-1) ind1 = theCookie.length; /*讀取Cookie值*/ return unescape(theCookie.substring(ind+cookieName.length+1,ind1)); } /*** * 設(shè)置Cookie值 setCookie("id",1); * @param {string} cookieName Cookie名稱 * @param {string} cookieValue Cookie值 * @param {number} nDays Cookie過期天數(shù) */ function setCookie(cookieName, cookieValue) { /*當(dāng)前日期*/ var today = new Date(); /*Cookie過期時(shí)間*/ var expire = new Date(); /*如果未設(shè)置nDays參數(shù)或者nDays為0,取默認(rèn)值1*/ //if(nDays == null || nDays == 0) nDays = 1; /*計(jì)算Cookie過期時(shí)間【 3600000 * 24 為一天】*/ expire.setTime(today.getTime() + 400000); //5分鐘 document.cookie = cookieName + "=" + escape(cookieValue) + ";expires=" + expire.toGMTString(); } /*** * 刪除cookie中指定變量函數(shù) * @param {string} $name Cookie名稱 */ function deleteCookie($name){ var myDate=new Date(); myDate.setTime(-1000);//設(shè)置時(shí)間 document.cookie=$name+"=''; expires="+myDate.toGMTString(); } /*** * 刪除cookie中所有定變量函數(shù) * @param {string} cookieName Cookie名稱 * @param {string} cookieValue Cookie值 * @param {number} nDays Cookie過期天數(shù) */ function clearCookie(){ var myDate=new Date(); myDate.setTime(-1000);//設(shè)置時(shí)間 var data=document.cookie; var dataArray=data.split("; "); for(var i=0;i<dataArray.length;i++){ var varName=dataArray[i].split("="); document.cookie=varName[0]+"=''; expires="+myDate.toGMTString(); } }
附:JS操作cookie的小插件
var CookieUtil = { // 設(shè)置cookie set : function (name, value, expires, domain, path, secure) { var cookieText = ""; cookieText += encodeURIComponent(name) + "=" + encodeURIComponent(value); if (expires instanceof Date) { cookieText += "; expires=" + expires.toGMTString(); } if (path) { cookieText += "; path=" + path; } if (domain) { cookieText += "; domain=" + domain; } if (secure) { cookieText += "; secure"; } document.cookie = cookieText; }, // name=value; expires=expiration_time; path=domain_path; domain=domain_name; secure // 獲取cookie get : function (name) { var cookieName = encodeURIComponent(name) + "=", cookieStart = document.cookie.indexOf(cookieName), cookieValue = ""; if (cookieStart > -1) { var cookieEnd = document.cookie.indexOf (";", cookieStart); if (cookieEnd == -1) { cookieEnd = document.cookie.length; } cookieValue = decodeURIComponent(document.cookie.substring(cookieStart + cookieName.length, cookieEnd)); } return cookieValue; }, // 刪除cookie unset : function (name, domain, path, secure) { this.set(name, "", Date(0), domain, path, secure); } };
感謝各位的閱讀!關(guān)于“JS怎么實(shí)現(xiàn)Cookie讀、寫、刪除操作工具類”這篇文章就分享到這里了,希望以上內(nèi)容可以對(duì)大家有一定的幫助,讓大家可以學(xué)到更多知識(shí),如果覺得文章不錯(cuò),可以把它分享出去讓更多的人看到吧!
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