标签:length rem oca ++ body res 清空 local als
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> </head> <body> <input type="button" value="返回个数" onclick="getLen()" /> <input type="button" value="增加" onclick="add();" /> <input type="button" value="修改" onclick="update();" /> <input type="button" value="删除" onclick="del();" /> <input type="button" value="返回value" onclick="get();" /> <input type="button" value="返回key" onclick="getKey();" /> <input type="button" value="清空" onclick="delAll();" /> <script> var i = localStorage.length; //计数变量 //返回web存储的键值对的个数 function getLen() { alert(localStorage.length); } //设置键值对 function add() { localStorage.setItem(‘username‘ + i,‘jack‘ + i); i ++; alert(‘存储成功‘); } //修改键值对 function update() { localStorage.setItem(‘username2‘,‘李四‘); alert(‘修改成功‘); } //删除键值对 function del() { localStorage.removeItem(‘username2‘); alert(‘删除成功‘); } //返回键对应的值 function get() { var result = localStorage.getItem(‘username3‘); alert(result); } //通过下标,返回key function getKey() { var key = localStorage.key(3); alert(key); } //删除所有数据 function delAll() { localStorage.clear(); alert(‘数据被清空‘); } </script> </body> </html>
标签:length rem oca ++ body res 清空 local als
原文地址:http://www.cnblogs.com/1020182600HENG/p/7278188.html