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?? ?? ???: localStorage

???? ????? ??? ? ? ???? ?? ??? ? ??? localStorage ??? ?? JS API? ???????. ?? Http ??? ?? ???? ??? ??? ???? ??? HTML5 ????? ????? ?? 4MB? ????? ????? ??? ???? ??? ??? ??? ????. ??? ??? ???? ?? ?? ? ?? ???? ?????. ??????? ??? ??? ?? ???? ??? ???? ?? ??? ?? ??? ?????. ???? ????? ???? localStorage ???? ???????.

localStorage? ?? ????? ?? ??? ???? ? ??? ?? ? ?? ??? ?????.

  • setItem(key, value)? ?? ??? ???? ?????. ? ????? ?? ????? ??? ???? ?????.

  • getItem(key)? key? ?? ?? ?? ?????.

  • removeItem(key)? ??? ?? ???? ?????.

  • clear()? ???? ????. 

<script type="text/javascript">
        //添加key-value 數(shù)據(jù)到 sessionStorage
        sessionStorage.setItem("demokey", "http://blog.itjeek.com");
        //通過key來獲取value
        var dt = sessionStorage.getItem("demokey");
        alert(dt);
        //清空所有的key-value數(shù)據(jù)。
        //sessionStorage.clear();
        alert(sessionStorage.length);
    </script>

JS? ??? ?????? Chrome ??? ??? ??? ??? ??? ???? ? ?? ??? ?? ? ????. ?? Chrome? ?? ?? ???? ? ?? ?? ????? ???. IE? ??? F12 ???? ???? ?? ??? ? ? ?? ?? ?????. ?? ??? ?? ?? ?????? sessionStorage ???? ??? ? ????.

QQ截圖20161014092902.png

???? ??
||
<!DOCTYPE html> <html> <head>  <meta charset="utf-8">  <title>php中文網(wǎng)</title>  </head> <body> <script type="text/javascript"> //添加key-value 數(shù)據(jù)到 sessionStorage sessionStorage.setItem("demokey", "http://blog.itjeek.com"); //通過key來獲取value var dt = sessionStorage.getItem("demokey"); alert(dt); //清空所有的key-value數(shù)據(jù)。 //sessionStorage.clear(); alert(sessionStorage.length); </script> </body> </html>