浏览器会在选项卡之间传播javascript变量吗？ [英] Do browsers propagate javascript variables across tabs?

问题描述

我有一些JavaScript可以查看是否设置了var，如果设置了var，请执行一些操作（如果没有设置）。

I have some JavaScript that will look to see if a var is set, if it is set then do something if not don't.

if (reset === 'reset') {
    gallery.unformat(container);
}

重置仅页面加载后设置。因此，该脚本仅在用户重新加载页面后执行。

reset is only set once the page has loaded. So this script will only execute after the user reloads the page.

如果我在Firefox中打开新标签页，则未设置重置。如果我在Chrome中打开新标签页，则会设置重置。

If i open a new tab in firefox reset isn't set. If i open a new tab in chrome reset is set.

因此，对于我来说，chrome可以正确处理它，并且只有在第一次访问该站点时，此var才会被设置，因此一切正常。

So for my case chrome handles it correctly and only on the first going to the site does this var get set and thus everything works correctly.

我想知道变量是否跨制表符传播，如果是这样的话，哪些浏览器会做什么？

I want to know is do variables propagate across tabs and if so which browsers do what?

推荐答案

变量应该 不 在新标签中保留。我无法重现您在Chrome中看到的行为。

Variables should not persist across new tabs. I can't reproduce the behaviour you see in Chrome.

您应该使用 cookies ，或者如果您想成为HTML5，请查看 localStorage 。

You should looking at using cookies, or if you want to be HTML5, look at localStorage.

这两个都是特定于域的，而不是按选项卡的。

Both of these are domain specific, rather than per-tab.

例如在 localStorage 中，您可以这样做；

E.g. in localStorage, you could go for;

// Check that localStorage is supported in the current browser, and then try
// to retrieve the item.
if ('localStorage' in window && localStorage.getItem('reset') === 'reset') {
    gallery.unformat(container);
}

然后您就可以设置 reset 之后通过;

You'd then be able to set reset later via;

localStorage.setItem('reset', 'reset');

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