Javascript 浏览器后退按钮处理
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Browser back button handling
提问by Ramesh Paul
I am trying to handle browser back button event but i could not find any solution.
我正在尝试处理浏览器后退按钮事件，但找不到任何解决方案。
I want to ask user if he clicks on browser back button using "confirm box" if he chooses ok i have to allow back button action else i have to stop back button action.
我想问用户他是否使用“确认框”点击浏览器后退按钮，如果他选择确定，我必须允许后退按钮动作，否则我必须停止后退按钮动作。
Can any one help me in implementing this.
任何人都可以帮助我实现这一点。
回答by Sampath
Warn/confirm User if Back button is Pressed is as below.
如果按下后退按钮，警告/确认用户如下。
window.onbeforeunload = function() { return "Your work will be lost."; };
You can get more information using below mentioned links.
您可以使用下面提到的链接获取更多信息。
Disable Back Button in Browser using JavaScript
I hope this will help to you.
我希望这会对你有所帮助。
回答by Szorstki
You can also add hash when page is loading:
您还可以在页面加载时添加哈希：
location.hash = "noBack";
Then just handle location hash change to add another hash:
然后只需处理位置哈希更改以添加另一个哈希：
$(window).on('hashchange', function() {
location.hash = "noBack";
});
That makes hash always present and back button tries to remove hash at first.Hash is then added again by "hashchange" handler - so page would never actually can be changed to previous one.
这使得哈希始终存在，而后退按钮首先尝试删除哈希。然后通过“hashchange”处理程序再次添加哈希 - 因此页面实际上永远无法更改为前一个。
