HTML5 Web Storage用法
华凯捷
<!DOCTYPE html >
<head>
<title>演示HTML5 Web Storage的用法</title>
</head>
<body>
<div id="storageDiv">
<form id="storageForm">
<article>
<section>
<span>姓名：</span>
<input type="text" name="name" id="name">
</section>
<section>
<span>年龄：</span>
<input type="text" name="age" id="age">
</section>
<section>
<span>生日：</span>
<input type="text" name="birthday" id="birthday">
</section>
</article>
<section>
<input type="button" οnclick="save2Storage();" value="本地存储">
<input type="button" οnclick="loadFromStorage();" value="从本地存储加载">
<input type="button" οnclick="javascript:localStorage.removeItem('pageCount');" value="从本地存储中删除pagecount">
<input type="button" οnclick="javascript:localStorage.clear();" value="从本地存储中删除">
</section>
</form>
</div>
<div id="footer"></div>
<script>
// localStorage:本地存储，永久保存。
// 统计页面访问人数
var pageCount = localStorage.getItem("pageCount");
if (pageCount != null && pageCount != undefined) {
localStorage.setItem("pageCount",parseInt(pageCount) + 1);
}
else {
localStorage.setItem("pageCount",1);
}
document.getElementById("footer").innerHTML="This page has been visited " + localStorage.getItem("pageCount") + " times";
// sessionStorage:一个会话周期内有效，关闭浏览器窗口后失效。
// 用法同localStorage
function save2Storage() {
var frm = document.getElementById('storageForm');
var formData = {
'name':frm.name.value,
'age':frm.age.value,
'birthday':frm.birthday.value
};
localStorage.setItem('formData',JSON.stringify(formData));
alert("数据保存成功！");
}
function loadFromStorage() {
var formData = localStorage.getItem('formData');
if (formData!=null) {
formData = JSON.parse(formData);
var frm = document.getElementById('storageForm');
frm.name.value = formData.name;
frm.age.value = formData.age;
frm.birthday.value = formData.birthday;
alert("数据加载完毕！");
}
}
</script>
</body>
</html>
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