使用 Javascript 仅会话 cookie
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Session only cookies with Javascript
提问by Daan Poron
I was wondering if it's possible to create session only cookies with Javascript. When the browser is closed the cookies should be removed.
我想知道是否可以使用 Javascript 创建仅会话 cookie。当浏览器关闭时，cookie 应该被删除。
I can't use anything on the server as the website is HTML only ... so no server side script is used.
我不能在服务器上使用任何东西，因为网站只是 HTML ......所以没有使用服务器端脚本。
I read something about this here: http://blog.lysender.com/2011/08/setting-session-only-cookie-via-javascript/but i can't find any more information about this ... so i was wondering if this method is reliable.
我在这里读到了一些关于这个的东西：http: //blog.lysender.com/2011/08/setting-session-only-cookie-via-javascript/但我找不到关于这个的更多信息......所以我是想知道这个方法是否可靠。
回答by Rhumborl
Yes, that is correct.
对，那是正确的。
Not putting an expirespart in will create a session cookie, whether it is created in JavaScript or on the server.
不放入expires部件将创建会话 cookie，无论它是在 JavaScript 中创建的还是在服务器上创建的。
回答by Cerbrus
A simpler solution would be to use sessionStorage, in this case:
一个更简单的解决方案是使用sessionStorage，在这种情况下：
var myVariable = "Hello World";
sessionStorage['myvariable'] = myVariable;
var readValue = sessionStorage['myvariable'];
console.log(readValue);
However, keep in mind that sessionStoragesaves everything as a string, so when working with arrays / objects, you can use JSON to store them:
但是，请记住，sessionStorage将所有内容保存为字符串，因此在处理数组/对象时，您可以使用 JSON 来存储它们：
var myVariable = {a:[1,2,3,4], b:"some text"};
sessionStorage['myvariable'] = JSON.stringify(myVariable);
var readValue = JSON.parse(sessionStorage['myvariable']);
A page session lasts for as long as the browser is open and survives over page reloads and restores. Opening a page in a new tab or window will cause a new session to be initiated.
只要浏览器打开，页面会话就会持续，并在页面重新加载和恢复后继续存在。在新选项卡或窗口中打开页面将导致启动新会话。
So, when you close the page / tab, the data is lost.
因此，当您关闭页面/选项卡时，数据将丢失。
回答by Gaurav Agarwal
For creating session only cookie with java script, you can use the following. This works for me.
要使用 java 脚本创建仅会话 cookie，您可以使用以下内容。这对我有用。
document.cookie = "cookiename=value; expires=0; path=/";
then get cookie value as following
然后获取cookie值如下
//get cookie
var cookiename = getCookie("cookiename");
if (cookiename == "value") {
//write your script
}
//function getCookie
function getCookie(cname) {
var name = cname + "=";
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);
if (c.indexOf(name) != -1) return c.substring(name.length, c.length);
}
return "";
}
Okay to support IE we can leave "expires" completely and can use this
好的，为了支持 IE，我们可以完全离开“过期”并可以使用它
document.cookie = "mtracker=somevalue; path=/";
