Javascript 如何测试javascript cookie是否已过期？
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how to test if a javascript cookie has expired?
提问by skip
Is it possible to test if a javascript cookie has expired using?
是否可以测试 javascript cookie 是否已过期？
I need to do a few thing conditionally and two of those conditions are overlapping for which if it could be tested whether a cookie has expired then it will be easier for me to get things done.
我需要有条件地做一些事情，其中两个条件是重叠的，如果可以测试 cookie 是否已过期，那么我将更容易完成工作。
I am using jquery-1.5.jsand jquery.cookies.jsplugin.
我正在使用jquery-1.5.js和jquery.cookies.js插件。
Thanks.
谢谢。
CODE
代码
var jq = jQuery.noConflict();
jq(document).ready(function () {
var timeStart, timeSubmit, timeLeft;
timeSubmit = 5 * 60 * 1000;
timeStart = jaaulde.utils.cookies.get("_watchman");
try {
if(jaaulde.utils.cookies.test()) {
throw "err1";
}
else if(hasCookieExpired) {
throw "err2";
}
else if(!timeStart) {
jaaulde.utils.cookies.set("_watchman", String(new Date().getTime()), {path: '/path', expiresAt: new Date((new Date().getTime() + timeSubmit))});
timeLeft = timeSubmit - (new Date().getTime() - Number(jaaulde.utils.cookies.get("_watchman")));
timeCheck();
}
else {
timeLeft = timeSubmit - (new Date().getTime() - Number(jaaulde.utils.cookies.get("_tts")));
timeCheck();
}
} catch(err) {
//handle errors
}
function timeCheck() {
if(timeLeft <= 0) {
triggerSubmit();
}
else {
setTimeout(triggerSubmit, timeLeft);
setInterval(showTimeLeft, 1000);
}
}
function triggerSubmit() {
//submit it
}
function showTimeLeft() {
//do something
}
});
回答by Roko C. Buljan
if( $.cookie('yourCookie') === null ) {
// EXPIRED
} else {
// DO SOMETHING ELSE
}
Or like this using Ternary operator:
或者像这样使用三元运算符：
$.cookie('yourCookie') === null ? /* EXPIRED */ : /* DO SOMETHING ELSE */;
https://github.com/carhartl/jquery-cookie(No longer maintained, archived)
https://developer.mozilla.org/en-US/docs/Web/API/Document/cookie
https://github.com/js-cookie/js-cookie
https://github.com/carhartl/jquery-cookie（不再维护，存档）
https://developer.mozilla.org/en-US/docs/Web/API/Document/cookie
https://github.com /js-cookie/js-cookie
回答by Caleb Joseph
A browser will automatically remove any cookie once it expires, so all you need to do is check whether the cookie exists or not.
浏览器会在任何 cookie 过期后自动删除它，因此您需要做的就是检查 cookie 是否存在。
回答by dmr
If you say that the browser did not remove the cookie, it's probably because your time zone is different from UTC.
如果您说浏览器没有删除cookie，那可能是因为您的时区与UTC 不同。
回答by FennRussel
To test, please enter below HTML code
要测试，请输入以下 HTML 代码
<label for="expsecs">Cookie expiration in seconds:</label>
<input type="text" id="expsecs" value="5" /><br />
<button id="setcookie">set cookie</button>
<button id="getcookie">get cookie</button>
<div id="cookiestatus">status</div>
Please enter below jQuery code
请输入下面的jQuery代码
function set_cookie() {
var secs = parseInt($('#expsecs').val(), 10);
if (isNaN(secs)) {
secs = 5;
}
var now = new Date();
var exp = new Date(now.getTime() + secs*1000);
var status = '';
document.cookie = 'ExpirationCookieTest=1; expires='+exp.toUTCString();
if (document.cookie && document.cookie.indexOf('ExpirationCookieTest=1') != -1) {
status = 'Cookie successfully set. Expiration in '+secs+' seconds';
} else {
status = 'Cookie NOT set. Please make sure your browser is accepting cookies';
}
$('#cookiestatus').text(status);
}
function get_cookie() {
var status = '';
if (document.cookie && document.cookie.indexOf('ExpirationCookieTest=1') != -1) {
status = 'Cookie is present';
} else {
status = 'Cookie is NOT present. It may be expired, or never set';
}
$('#cookiestatus').text(status);
}
function init() {
$('#setcookie').bind('click', set_cookie);
$('#getcookie').bind('click', get_cookie);
}
$(init);
Check this in jsfiddle
在jsfiddle 中检查这个
