<html>
<head>
<meta charset="utf-8">
<title>web存储</title>
</head>
<body>
<p id="result"></p>
<div style="border: 2px dashed #ccc;320px;text-align:center;">
<label for="sitename">网站名(key)：</label>
<input type="text" id="sitename" name="sitename" class="text"/>
<br/>
<label for="siteurl">网 址(value)：</label>
<input type="text" id="siteurl" name="siteurl"/>
<br/>
<input type="button" onclick="save()" value="新增记录"/>
<hr/>
<label for="search_site">输入网站名：</label>
<input type="text" id="search_site" name="search_site"/>
<input type="button" onclick="find()" value="查找网站"/>
<p id="find_result"><br/></p>
</div>
<script>
//web储存主要利用Storage对象及IndexedDataBase API(web SQL DB 已废弃)
//ps:localStorage是Storage的实例
// globalStorage不是Storage的实例,globalStorage(location.host)才是
// sessionStorage只适合短暂的会话储存而不适合长期的存储，
// 长期存储可采用localStorage
//判断是否支持
if (typeof (Storage) !== "undefined") {
console.log("支持");
} else {
console.log("don't work");
}
//localStorage储存无时间限制
localStorage.sitename = "逗趣";//利用属性保存
document.querySelector("#result").innerHTML = `网站名:${localStorage.sitename}`;
localStorage.setItem("sitename",1);//利用方法保存
localStorage.setItem("sitename2",6);
console.log(localStorage.sitename);
localStorage.removeItem("sitename");//方法移除，也可利用属性移除
console.log(localStorage.sitename);
var name = localStorage.key(2);//索引
console.log(name);
//保存数据
function save() {
var siteurl = document.getElementById("siteurl").value;
var sitename = document.getElementById("sitename").value;
localStorage.setItem(sitename, siteurl);
alert("添加成功");
}
//查找数据
function find() {
var search_site = document.getElementById("search_site").value;
var sitename = localStorage.getItem(search_site);
var find_result = document.getElementById("find_result");
find_result.innerHTML = search_site + "的网址是：" + sitename;
}
</script>
</body>
</html>