您如何确定地检测用户是否在浏览器中按下了后退按钮?
如何使用#URL系统在单页web应用程序中强制使用页面内返回按钮?
为什么浏览器的后退按钮不触发它们自己的事件!?
当前回答
你可以尝试popstate事件处理程序，例如:
window.addEventListener('popstate', function(event) {
// The popstate event is fired each time when the current history entry changes.
var r = confirm("You pressed a Back button! Are you sure?!");
if (r == true) {
// Call Back button programmatically as per user confirmation.
history.back();
// Uncomment below line to redirect to the previous page instead.
// window.location = document.referrer // Note: IE11 is not supporting this.
} else {
// Stay on the current page.
history.pushState(null, null, window.location.pathname);
}
history.pushState(null, null, window.location.pathname);
}, false);
注意:为了获得最佳结果，您应该只在希望实现逻辑的特定页面上加载此代码，以避免任何其他意外问题。
每当当前历史记录项更改(用户导航到新状态)时，就会触发popstate事件。当用户单击浏览器的后退/前进按钮时，或者当以编程方式调用history.back()、history.forward()、history.go()方法时，就会发生这种情况。
该事件。状态是事件的属性，等于历史状态对象。
对于jQuery语法，将它环绕起来(在文档准备好后添加监听器):
(function($) {
// Above code here.
})(jQuery);
参见:window。Onpopstate页面加载
参见单页应用程序和HTML5 pushState页面的示例:
<script>
// jQuery
$(window).on('popstate', function (e) {
var state = e.originalEvent.state;
if (state !== null) {
//load content with ajax
}
});
// Vanilla javascript
window.addEventListener('popstate', function (e) {
var state = e.state;
if (state !== null) {
//load content with ajax
}
});
</script>
这应该与Chrome 5+， Firefox 4+， IE 10+， Safari 6+， Opera 11.5+和类似的兼容。
其他回答
只有重新定义API(更改对象' history '的方法)，才能实现成熟的组件。 我将分享刚才写的课程。 在Chrome和Mozilla上测试 仅支持HTML5和ECMAScript5-6
class HistoryNavigation {
static init()
{
if(HistoryNavigation.is_init===true){
return;
}
HistoryNavigation.is_init=true;
let history_stack=[];
let n=0;
let current_state={timestamp:Date.now()+n};
n++;
let init_HNState;
if(history.state!==null){
current_state=history.state.HNState;
history_stack=history.state.HNState.history_stack;
init_HNState=history.state.HNState;
} else {
init_HNState={timestamp:current_state.timestamp,history_stack};
}
let listenerPushState=function(params){
params=Object.assign({state:null},params);
params.state=params.state!==null?Object.assign({},params.state):{};
let h_state={ timestamp:Date.now()+n};
n++;
let key = history_stack.indexOf(current_state.timestamp);
key=key+1;
history_stack.splice(key);
history_stack.push(h_state.timestamp);
h_state.history_stack=history_stack;
params.state.HNState=h_state;
current_state=h_state;
return params;
};
let listenerReplaceState=function(params){
params=Object.assign({state:null},params);
params.state=params.state!==null?Object.assign({},params.state):null;
let h_state=Object.assign({},current_state);
h_state.history_stack=history_stack;
params.state.HNState=h_state;
return params;
};
let desc=Object.getOwnPropertyDescriptors(History.prototype);
delete desc.constructor;
Object.defineProperties(History.prototype,{
replaceState:Object.assign({},desc.replaceState,{
value:function(state,title,url){
let params={state,title,url};
HistoryNavigation.dispatchEvent('history.state.replace',params);
params=Object.assign({state,title,url},params);
params=listenerReplaceState(params);
desc.replaceState.value.call(this,params.state,params.title,params.url);
}
}),
pushState:Object.assign({},desc.pushState,{
value:function(state,title,url){
let params={state,title,url};
HistoryNavigation.dispatchEvent('history.state.push',params);
params=Object.assign({state,title,url},params);
params=listenerPushState(params);
return desc.pushState.value.call(this, params.state, params.title, params.url);
}
})
});
HistoryNavigation.addEventListener('popstate',function(event){
let HNState;
if(event.state==null){
HNState=init_HNState;
} else {
HNState=event.state.HNState;
}
let key_prev=history_stack.indexOf(current_state.timestamp);
let key_state=history_stack.indexOf(HNState.timestamp);
let delta=key_state-key_prev;
let params={delta,event,state:Object.assign({},event.state)};
delete params.state.HNState;
HNState.history_stack=history_stack;
if(event.state!==null){
event.state.HNState=HNState;
}
current_state=HNState;
HistoryNavigation.dispatchEvent('history.go',params);
});
}
static addEventListener(...arg)
{
window.addEventListener(...arg);
}
static removeEventListener(...arg)
{
window.removeEventListener(...arg);
}
static dispatchEvent(event,params)
{
if(!(event instanceof Event)){
event=new Event(event,{cancelable:true});
}
event.params=params;
window.dispatchEvent(event);
};
}
HistoryNavigation.init();
// exemple
HistoryNavigation.addEventListener('popstate',function(event){
console.log('Will not start because they blocked the work');
});
HistoryNavigation.addEventListener('history.go',function(event){
event.params.event.stopImmediatePropagation();// blocked popstate listeners
console.log(event.params);
// back or forward - see event.params.delta
});
HistoryNavigation.addEventListener('history.state.push',function(event){
console.log(event);
});
HistoryNavigation.addEventListener('history.state.replace',function(event){
console.log(event);
});
history.pushState({h:'hello'},'','');
history.pushState({h:'hello2'},'','');
history.pushState({h:'hello3'},'','');
history.back();
```
浏览器会发出popstate事件，如果你通过你的应用程序调用导航
window.history.pushState({},'','/to')
如果您手动在地址栏中输入地址并单击后退按钮，popstate事件将不会被触发。
如果你用这个简化的功能在应用中导航
const navigate = (to) => {
window.history.pushState({}, ",", to);
};
这样就可以了
const handlePopstate = () => {
console.log("popped");
};
window.addEventListener("popstate", handlePopstate);
<input style="display:none" id="__pageLoaded" value=""/>
$(document).ready(function () {
if ($("#__pageLoaded").val() != 1) {
$("#__pageLoaded").val(1);
} else {
shared.isBackLoad = true;
$("#__pageLoaded").val(1);
// Call any function that handles your back event
}
});
上面的代码对我有用。在移动浏览器上，当用户单击后退按钮时，我们希望恢复页面状态与他上次访问时相同。
浏览器:https://jsfiddle.net/Limitlessisa/axt1Lqoz/
移动控制:https://jsfiddle.net/Limitlessisa/axt1Lqoz/show/
$(document).ready(function() { $('body').on('click touch', '#share', function(e) { $('.share').fadeIn(); }); }); // geri butonunu yakalama window.onhashchange = function(e) { var oldURL = e.oldURL.split('#')[1]; var newURL = e.newURL.split('#')[1]; if (oldURL == 'share') { $('.share').fadeOut(); e.preventDefault(); return false; } //console.log('old:'+oldURL+' new:'+newURL); } .share{position:fixed; display:none; top:0; left:0; width:100%; height:100%; background:rgba(0,0,0,.8); color:white; padding:20px; <!DOCTYPE html> <html> <head> <title>Back Button Example</title> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> </head> <body style="text-align:center; padding:0;"> <a href="#share" id="share">Share</a> <div class="share" style=""> <h1>Test Page</h1> <p> Back button press please for control.</p> </div> </body> </html>
正在寻找这个问题的解决方案，并根据这里的一些答案和History.pushState()和WindowEventHandlers.onpopstate的MDN Web文档页面，将一个简单的骨架测试html放在一起。
下面的HTML和JavaScript很容易复制、粘贴和测试。
使用后退和前进浏览器按钮，快捷键，添加对URL的更改(这在某些情况下很重要)。
简单到可以向现有代码中添加关键点，并且应该是可扩展的。
<html>
<body>
<div id="p1">Option 1</div>
<div id="p2">Option 2</div>
<div id="p3">Option 3</div>
<div id="p4">Option 4</div>
<div id="c"></div>
<script>
var chg={
set:function(str){
var d=document.getElementById("c");
d.textContent=str;
},
go:function(e){
var s={"p":this.id};
chg.set(s.p);
hstry.add(s);
}
};
var hstry={
add:function(s){
var u=new URL(window.location);
u.searchParams.set("x",s.p);
window.history.pushState(s,"",u);
},
adjust:function(state){
if(state.p){
chg.set(state.p);
}
}
};
window.onpopstate=function(e){
console.log("popstate, e.state:["+ JSON.stringify(e.state) +"]");
hstry.adjust(e.state);
}
window.onload=function(){
var i,d,a=["p1","p2","p3","p4"];
for(i=0;i<a.length;i++){
d=document.getElementById(a[i]);
d.addEventListener("click",chg.go,false);
}
}
</script>
</body>
</html>
