JavaScript监听手机物理返回键的两种解决方法

 pushHistory();     window.addEventListener("popstate", function(e) {       window.location = 'http://www.baidu.com';    }, false);     function pushHistory() {       var state = {         title: "title",         url: "#"      };       window.history.pushState(state, "title", "#");     }

/** * 使用 HTML5 的 History 新 API pushState 来曲线监听 Android 设备的返回按钮 * XBack.listen(function(){    alert('oh! you press the back button');  }); */;!function(pkg, undefined){  var STATE = 'x-back';  var element;  var onPopState = function(event){    event.state === STATE && fire();  }  var record = function(state){    history.pushState(state, null, location.href);  }  var fire = function(){    var event = document.createEvent('Events');    event.initEvent(STATE, false, false);    element.dispatchEvent(event);  }  var listen = function(listener){    element.addEventListener(STATE, listener, false);  }  ;!function(){    element = document.createElement('span');    window.addEventListener('popstate', onPopState);    this.listen = listen;    record(STATE);  }.call(window[pkg] = window[pkg] || {});}('XBack');

XBack.listen(function(){  alert('back');});