实际上，有两种方法可以通过JavaScript清除localStorage。
方式1-使用clear()方法
localStorage.clear();
Way2-遍历localStorage并删除所有键
for(key in localStorage){
delete localStorage[key];
}两种方式都可以。
<html>
<body>
<p id = "storage"></p>
<script>
if (typeof(Storage) !== "undefined") {
localStorage.setItem("product", "Tutorix");
//显示前清除
localStorage.clear();
document.getElementById("storage").innerHTML = localStorage.getItem("product");
}
else {
document.getElementById("storage").innerHTML = "Sorry, no Web Storage
compatibility...";
}
</script>
</body>
</html>