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

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();

    ```

其他回答

 <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。

正确答案已经在那里了。我想提一下新的JavaScript API PerformanceNavigationTiming,它取代了过时的performance。navigation。

下面的代码将登录控制台“back_forward”如果用户登陆到您的页面使用后退或前进按钮。在项目中使用兼容性表之前,请先查看兼容性表。

var perfEntries = performance.getEntriesByType("navigation");
for (var i = 0; i < perfEntries.length; i++) {
    console.log(perfEntries[i].type);
}

我已经为这个需求挣扎了很长一段时间,并采用了上面的一些解决方案来实现它。然而,我偶然发现,它似乎可以在Chrome、Firefox和Safari浏览器以及Android和iPhone上运行

页面加载:

window.history.pushState({page: 1}, "", "");

window.onpopstate = function(event) {

  // "event" object seems to contain value only when the back button is clicked
  // and if the pop state event fires due to clicks on a button
  // or a link it comes up as "undefined" 

  if(event){
    // Code to handle back button or prevent from navigation
  }
  else{
    // Continue user action through link or button
  }
}

如果有帮助请告诉我。如果我错过了什么,我会很高兴去理解。

看到这个:

history.pushState(null, null, location.href);
    window.onpopstate = function () {
        history.go(1);
    };

它工作得很好……

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>