Javascript 如何更新和删除cookie?
我需要帮助,以了解如何更新值以及如何删除从此代码创建的cookie!我是JavaScript新手,所以如果有人能帮助我,那就太好了Javascript 如何更新和删除cookie?,javascript,cookies,Javascript,Cookies,我需要帮助,以了解如何更新值以及如何删除从此代码创建的cookie!我是JavaScript新手,所以如果有人能帮助我,那就太好了 function getCookie(c_name) { var i,x,y,ARRcookies = document.cookie.split(";"); for (i=0;i<ARRcookies.length;i++) { x = ARRcookies[i].substr(0,ARRcookies[i].inde
function getCookie(c_name) {
var i,x,y,ARRcookies = document.cookie.split(";");
for (i=0;i<ARRcookies.length;i++) {
x = ARRcookies[i].substr(0,ARRcookies[i].indexOf("="));
y = ARRcookies[i].substr(ARRcookies[i].indexOf("=")+1);
x = x.replace(/^\s+|\s+$/g,"");
if (x==c_name) {
return unescape(y);
}
}
}
function setCookie(c_name,value,exdays) {
var exdate = new Date();
exdate.setDate(exdate.getDate() + exdays);
var c_value = escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toUTCString());
document.cookie=c_name + "=" + c_value;
}
function check2Cookie() {
var username=getCookie("username");
if (username!=null && username!="") {
username= "0";
setCookie("username",username,1000);
}
else {
username=" ";
if (username!=null && username!="") {
username= "0";
setCookie("username",username,1000);
}
}
}
函数getCookie(c_名称){
变量i,x,y,ARRcookies=document.cookie.split(“;”);
对于(i=0;i
更新将只是使用createCookie重置它
function createCookie(name,value,days) {
if (days) {
var date = new Date();
date.setTime(date.getTime() + (days * 24 * 60 * 60 *1000));
var expires = "; expires=" + date.toGMTString();
} else {
var expires = "";
}
document.cookie = name + "=" + value + expires + "; path=/";
}
function readCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for(var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==' ') {
c = c.substring(1,c.length);
}
if (c.indexOf(nameEQ) == 0) {
return c.substring(nameEQ.length,c.length);
}
}
return null;
}
function eraseCookie(name) {
createCookie(name,"",-1);
}
函数createCookie(名称、值、天数){
如果(天){
变量日期=新日期();
date.setTime(date.getTime()+(天*24*60*60*1000));
var expires=“;expires=“+date.togmString();
}否则{
var=”;
}
document.cookie=name+“=”+value+expires+“path=/”;
}
函数readCookie(名称){
变量nameEQ=name+“=”;
var ca=document.cookie.split(“;”);
对于(变量i=0;i
函数createCookie(名称、值、天数){
如果(天){
变量日期=新日期();
date.setTime(date.getTime()+(天*24*60*60*1000));
var expires=“;expires=“+date.togmString();
}
else var expires=“”;
document.cookie=name+“=”+value+expires+“path=/”;
}
函数readCookie(名称){
变量nameEQ=name+“=”;
var ca=document.cookie.split(“;”);
对于(变量i=0;i
CookieAPI有点蹩脚。让我澄清一下……
您不更新Cookie,而是覆盖它们:
您也不会删除cookie;您可以通过将expires
键设置为过去的某个时间(-1)使cookie过期
来源:请查看此内容
/*\
|*|
|*|::cookies.js::
|*|
|*|具有完全unicode支持的完整Cookie读写器框架。
|*|
|*|修订版#1-2014年9月4日
|*|
|*| https://developer.mozilla.org/en-US/docs/Web/API/document.cookie
|*| https://developer.mozilla.org/User:fusionchess
|*| https://github.com/madmurphy/cookies.js
|*|
|*|此框架是在GNU公共许可证(版本3或更高版本)下发布的。
|*| http://www.gnu.org/licenses/gpl-3.0-standalone.html
|*|
|*|语法:
|*|
|*|*docCookies.setItem(名称、值[、结束[、路径[、域[、安全]]])
|*|*docCookies.getItem(名称)
|*|*docCookies.removietem(名称[,路径[,域]])
|*|*docCookies.hasItem(名称)
|*|*docCookies.keys()
|*|
\*/
var docCookies={
getItem:函数(sKey){
如果(!sKey){return null;}
返回decodeURIComponent(document.cookie.replace(新的RegExp((?:(?:^ |.*))\\s*“+encodeURIComponent(sKey)。replace(/[\-\.\+\*]/g,\\\$&”)+“\\s*\=\\s*([^;]*)\^.$”,$1”)\124;空;
},
setItem:函数(sKey、sValue、vEnd、sPath、sDomain、bSecure){
如果(!sKey | |/^(?:expires | max-age | path | domain | secure)$/i.test(sKey)){return false;}
var sExpires=“”;
如果(卖方){
交换机(供应商构造函数){
案件编号:
sExpires=vEnd==Infinity?;expires=Fri,1999年12月31日23:59:59 GMT:“最大年龄=”+vEnd;
打破
大小写字符串:
sExpires=“;expires=“+vEnd;
打破
案件日期:
sExpires=“;expires=“+vEnd.toutString();
打破
}
}
document.cookie=encodeURIComponent(sKey)+“=”+encodeURIComponent(sValue)+sExpires+(sDomain?”;domain=“+sDomain:”)+(sPath?”;path=“+sPath:”)+(bSecure?”;secure:“);
返回true;
},
removeItem:函数(sKey、sPath、sDomain){
如果(!this.hasItem(sKey)){return false;}
document.cookie=encodeURIComponent(sKey)+“=;expires=Thu,1970年1月1日00:00:00 GMT”+(sDomain?;domain=“+sDomain:”)+(sPath?;path=“+sPath:”);
返回true;
},
hasItem:功能(sKey){
如果(!sKey){return false;}
返回(新的RegExp(“(?:^\\\\s*)”+encodeURIComponent(sKey)。替换(/[\-\.\+\*]/g,“\\$&”)+“\\s*\=”)。测试(document.cookie);
},
键:函数(){
var aKeys=document.cookie.replace(/((?:^\s*)[^\=]+)(?=|$)\s*(?:\=[^;]*)(?:\=[^;]*)(?:\1 |$)/g,”)。split(/\s*(?:\=[^;]*))\s*);
对于(var nLen=aKeys.length,nIdx=0;nIdx
谢谢,但我的密码只是更新用户名的值。.当用户注销时,我想删除此cookie。.是的,我知道如何删除cookie,但我仍然不知道更新cookie的用户名值!是的,我注意到了,所以我接受了你的回答。:)你可以使用你已经在使用的方法来保存现有的cookie:setCookie(“username”,username,1000);每个答案都已经有了更新cookie的方法,为什么你总是问如何更新已经存在的名称值
function createCookie(name,value,days) {
if (days) {
var date = new Date();
date.setTime(date.getTime()+(days*24*60*60*1000));
var expires = "; expires="+date.toGMTString();
}
else var expires = "";
document.cookie = name+"="+value+expires+"; path=/";
}
function readCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for(var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
}
return null;
}
function eraseCookie(name) {
createCookie(name,"",-1);
}
document.cookie = "username=Arnold"; // Create 'username' cookie
document.cookie = "username=Chuck"; // Update, i.e. overwrite, the 'username' cookie to "Chuck"
/*\
|*|
|*| :: cookies.js ::
|*|
|*| A complete cookies reader/writer framework with full unicode support.
|*|
|*| Revision #1 - September 4, 2014
|*|
|*| https://developer.mozilla.org/en-US/docs/Web/API/document.cookie
|*| https://developer.mozilla.org/User:fusionchess
|*| https://github.com/madmurphy/cookies.js
|*|
|*| This framework is released under the GNU Public License, version 3 or later.
|*| http://www.gnu.org/licenses/gpl-3.0-standalone.html
|*|
|*| Syntaxes:
|*|
|*| * docCookies.setItem(name, value[, end[, path[, domain[, secure]]]])
|*| * docCookies.getItem(name)
|*| * docCookies.removeItem(name[, path[, domain]])
|*| * docCookies.hasItem(name)
|*| * docCookies.keys()
|*|
\*/
var docCookies = {
getItem: function (sKey) {
if (!sKey) { return null; }
return decodeURIComponent(document.cookie.replace(new RegExp("(?:(?:^|.*;)\\s*" + encodeURIComponent(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*([^;]*).*$)|^.*$"), "$1")) || null;
},
setItem: function (sKey, sValue, vEnd, sPath, sDomain, bSecure) {
if (!sKey || /^(?:expires|max\-age|path|domain|secure)$/i.test(sKey)) { return false; }
var sExpires = "";
if (vEnd) {
switch (vEnd.constructor) {
case Number:
sExpires = vEnd === Infinity ? "; expires=Fri, 31 Dec 9999 23:59:59 GMT" : "; max-age=" + vEnd;
break;
case String:
sExpires = "; expires=" + vEnd;
break;
case Date:
sExpires = "; expires=" + vEnd.toUTCString();
break;
}
}
document.cookie = encodeURIComponent(sKey) + "=" + encodeURIComponent(sValue) + sExpires + (sDomain ? "; domain=" + sDomain : "") + (sPath ? "; path=" + sPath : "") + (bSecure ? "; secure" : "");
return true;
},
removeItem: function (sKey, sPath, sDomain) {
if (!this.hasItem(sKey)) { return false; }
document.cookie = encodeURIComponent(sKey) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT" + (sDomain ? "; domain=" + sDomain : "") + (sPath ? "; path=" + sPath : "");
return true;
},
hasItem: function (sKey) {
if (!sKey) { return false; }
return (new RegExp("(?:^|;\\s*)" + encodeURIComponent(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=")).test(document.cookie);
},
keys: function () {
var aKeys = document.cookie.replace(/((?:^|\s*;)[^\=]+)(?=;|$)|^\s*|\s*(?:\=[^;]*)?(?:\1|$)/g, "").split(/\s*(?:\=[^;]*)?;\s*/);
for (var nLen = aKeys.length, nIdx = 0; nIdx < nLen; nIdx++) { aKeys[nIdx] = decodeURIComponent(aKeys[nIdx]); }
return aKeys;
}
};