javascript 绑定 popstate 事件不起作用

binding popstate event not working

提问by mirelon

I have tried to type this code into the browser's console:

我试图将此代码输入浏览器的控制台：

window.onpopstate = function() {alert(1);}

and then click the back button. No alert has shown. Am I doing something wrong? Or is it not allowed to bind popstate event to a page from console?

然后单击后退按钮。没有显示警报。难道我做错了什么？还是不允许从控制台将 popstate 事件绑定到页面？

Using Chrome 24 and Firefox 18

使用 Chrome 24 和 Firefox 18

回答by Sean Hogan

Type this into the console

在控制台输入这个

window.onpopstate = function() {alert(1);}; history.pushState({}, '');

then click the back button.

然后单击后退按钮。

回答by Trev14

I prefer adding the popstate listener as follows, to prevent overwriting of what's already in window.onpopstate:

我更喜欢按如下方式添加 popstate 侦听器，以防止覆盖已经存在的内容window.onpopstate：

window.addEventListener('popstate', function(){alert(1);});