標籤：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="返回個數" onclick="getLen()" /><input type="button" value="增加" onclick="add();" /><input type="button" value="修改" onclick="update();" /><input type="button" value="刪除" 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; //計數變數//返回web儲存的索引值對的個數function getLen() {alert(localStorage.length); }//設定索引值對function add() {localStorage.setItem(‘username‘ + i,‘jack‘ + i);i ++;alert(‘儲存成功‘);}//修改索引值對function update() {localStorage.setItem(‘username2‘,‘李四‘);alert(‘修改成功‘);}//刪除索引值對function del() {localStorage.removeItem(‘username2‘);alert(‘刪除成功‘);}//返回鍵對應的值function get() {var result = localStorage.getItem(‘username3‘);alert(result);}//通過下標，返回keyfunction getKey() {var key = localStorage.key(3);alert(key);}//刪除所有資料function delAll() {localStorage.clear();alert(‘資料被清空‘);}</script></body></html>
h5-26-web本機存放區
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