18

下面是一个简单的pushStateandpopstate事件示例：

<button id="example_btn">Click me</button>

<script>
$("#example_btn").click(function(){
            history.pushState( 
                {
                    'url' : "example.htm"
                }, null, "example.htm");
});
$(window).bind('popstate', function (event) {
    if (event.originalEvent.state) {
        console.log(event.originalEvent.state.url);
    }
});
</script>

触发popstate事件时，显示当前页面的url。

我的问题是：

这种情况下触发事件时如何获取上一页的url？PS我试过了，但没有显示任何东西。popstate


document.referrer

4

2 回答 2

5

请尝试将 previousUrl 保存在变量中并收听它。

<button id="example_btn">Click me</button>

<script>
var previousUrl = null;
$("#example_btn").on('click', function(){
           previousUrl = location.href;
             history.pushState( 
                {
                    'url' : "example.htm"
                }, null, "example.htm");
});
window.onpopstate = function (event) {
   console.log('Previous url was : ', previousUrl); 
};
</script>
于 2017-04-20T14:32:05.520 回答
-1

更新 & 测试 & 工作

扩展历史对象

这是我的来源，您可以从https://gist.github.com/HasanDelibas/12050fc59d675181ea973d21f882081a看到完整资源

该库包含：

  • history.states -> 获取状态列表
  • history.stateIndex -> 当前状态索引
  • "historyChange" 事件 -> 检测历史变化 (from,to,side="back"|"forward")
  • 重要的！ state必须是对象history.pushState( **state**, ...)
(function(){
  let stateSymbol = "__state__index__";
  history.stateIndex =-1;
  history.states=[];
  let pushState = history.pushState;
  function add(data,title,url){
    if(data==null) data={};
    if(typeof data!="object") data={data:data};
    data[stateSymbol] = (history.stateIndex+1);
    history.states.splice(history.stateIndex+1,0,[data,title,url])
    history.states.splice(history.stateIndex+2)
    history.stateIndex++;
  }
  history.pushState =function(data,title,url=null){
    add(data,title,url);
    pushState.bind(history)(data,title,url);
  }
  addEventListener("popstate",function(e){
    var eventObject= {};
    var newStateIndex =  e.state!=null ? e.state[stateSymbol] : -1;
    eventObject.from = history.states[history.stateIndex];
    eventObject.to   = newStateIndex>-1 ? history.states[newStateIndex] : null;
    eventObject.side = history.stateIndex>newStateIndex ? "back" : "forward"; 
    if( newStateIndex > -1 && !(newStateIndex in history.states) ){
      add(history.state,"",window.location.href);
    }
    window.dispatchEvent(new CustomEvent("historyChange", {detail: eventObject} ))
    history.stateIndex = e.state!=null ? e.state[stateSymbol] : -1;
  });
})();

现在您可以使用history.states对象获取所有状态，并使用addEventListener("popstate",function(e))

使用

/**
  * @param e.detail.from [data,title,url]
  * @param e.detail.to   [data,title,url]
  * @param e.detail.side "back" | "forward"
  */
addEventListener("historyChange",function(e){
  var from = e.detail.from; // [ data , title , url ]
  var to   = e.detail.to;   // [ data , title , url ]
  var side = e.detail.side; // "back" | "forward"
  console.log( `You changed history. Side is ${e.detail.side}.\nFrom:${e.detail.from[2]}\nTo:${e.detail.to[2]}`)
})


history.pushState("1", "DENEME-TEST" ,"?1");
history.pushState("2", "DENEME-TEST" ,"?2");
// list of history states
console.log( history.states )
/*
[
  [ {...} ,  "DENEME-TEST" ,"?1" ]
  [ {...} ,  "DENEME-TEST" ,"?2" ]
]
*/
// get history current state index
console.log( history.stateIndex )
/*
1
*/
于 2018-02-09T23:22:35.997 回答