HTML5 Web Storage用法

桃扇骨 2022-08-13 17:33 233阅读 0赞

<!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>

HTML5 Web Storage介绍及用法请参考：http://www.cnblogs.com/amtf/archive/2012/02/19/2355693.html