HTML5 本地存储 LocalStorage详解
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对于事件变量e，是一个StorageEvent对象，提供了一些实用的属性，可以很好的观察键值对的变化，如下表： Property Type Descriptionkey String The named key that was added, removed, or moddified oldValue Any The previous value(now overwritten), or null if a new item was added newValue Any The new value, or null if an item was added url/uri String The page that called the method that triggered this change 这里添加两个键值对a和b，并增加一个按钮。给a设置固定的值，当点击按钮时，修改b的值：
JavaScript Code复制内容到剪贴板
<body> <p>You have viewed this page <span id="count">0</span> time(s).</p> <p><input type="button" value="changeStorage" onClick="changeS()"/></p> <script> var storage = window.localStorage; if (!storage.getItem("pageLoadCount")) storage.setItem("pageLoadCount",0); storage.pageLoadCount = parseInt(storage.getItem("pageLoadCount")) +1;//必须格式转换 document.getElementByIdx_x("count").innerHTML = storage.pageLoadCount; showStorage(); if(window.addEventListener){ window.addEventListener("storage",handle_storage,false); }elseif(window.attachEvent){ window.attachEvent("onstorage",handle_storage); } function handle_storage(e){ if(!e){e=window.event;} showObject(e); } function showObject(obj){ //递归显示object if(!obj){return;} for(var i in obj){ if(typeof(obj[i])!="object"|| obj[i]==null){ document.write(i +" : "+ obj[i] +"<br/>"); }else{ document.write(i +" : object"+"<br/>"); } } } storage.setItem("a",5); function changeS(){ //修改一个键值，测试storage事件 if(!storage.getItem("b")){storage.setItem("b",0);} storage.setItem('b',parseInt(storage.getItem('b'))+1); } function showStorage(){ //循环显示localStorage里的键值对 for(var i=0;i<storage.length;i++){ //key(i)获得相应的键，再用getItem()方法获得对应的值 （编辑：焦作站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |