window.location.href 更改时的事件 [英] Event when window.location.href changes

问题描述

我正在为某个站点编写 Greasemonkey 脚本，该脚本在某些时候会修改 location.href.

I'm writing a Greasemonkey script for a site which at some point modifies location.href.

当页面上的 window.location.href 发生变化时，我如何获得事件(通过 window.addEventListener 或类似的东西)?我还需要访问指向新/修改后的 url 的文档的 DOM.

How can I get an event (via window.addEventListener or something similar) when window.location.href changes on a page? I also need access to the DOM of the document pointing to the new/modified url.

我见过其他涉及超时和轮询的解决方案，但我想尽可能避免这种情况.

I've seen other solutions which involve timeouts and polling, but I'd like to avoid that if possible.

推荐答案

popstate event:

popstate 事件在活动历史记录条目更改时触发.[...] popstate 事件仅通过执行浏览器操作触发，例如单击后退按钮(或在 JavaScript 中调用 history.back())

The popstate event is fired when the active history entry changes. [...] The popstate event is only triggered by doing a browser action such as a click on the back button (or calling history.back() in JavaScript)

因此，在使用 history.pushState() 时监听 popstate 事件并发送 popstate 事件应该足以对 <代码>href 更改:

So, listening to popstate event and sending a popstate event when using history.pushState() should be enough to take action on href change:

window.addEventListener('popstate', listener);

const pushUrl = (href) => {
  history.pushState({}, '', href);
  window.dispatchEvent(new Event('popstate'));
};

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