HTML5本地存储 -sessionStorage localStorage 总结

//--------------------------会话级别的本地存储：sessionStorage-----------------------

<script type="text/javascript">
//添加key-value 数据到 sessionStorage
sessionStorage.setItem("demokey", "sessionStorage数据");
//通过key来获取value
var dt = sessionStorage.getItem("demokey");
alert(dt);
//清空所有的key-value数据。
//sessionStorage.clear();
alert(sessionStorage.length);
</script>

//--------------------------永久本地存储：localStorage-----------------------------------
<script type="text/javascript">
//添加key-value 数据到 localStorage
localStorage.setItem("demokey", "localStorage数据");
//通过key来获取value
var dt = localStorage.getItem("demokey");
alert(dt);
//清空所有的key-value数据。
//localStorage.clear();
alert(localStorage.length);
</script>