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数据库indexDB

时间：2021-07-01 10:21:17 帮助过：3人阅读

DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title></title> <script> window.indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB; window.IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || window.msIDBTransaction; window.IDBKeyRange = window.IDBKeyRange || window.webkitIDBKeyRange || window.msIDBKeyRange; window.IDBCursor=window.IDBCursor || window.webkitIDBCursor ||window.msIDBCursor; function connectDatabase(){ var dbName = "indexedDBtest"; var dbVersion = 1; var idb; var dbConnect = indexedDB.open(dbName,dbVersion); //打开数据库 dbConnect.onsuccess = function(e){ //是否链接成功，链接成功之后，返回信息 idb = e.target.result; alert("数据库链接成功") } dbConnect.onerror = function(e){ alert("数据库链接失败") } } </script> </head> <body> <input type="button" value="链接数据库" onclick="connectDatabase()"> </body> </html> View Code

2，数据库版本更新

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title></title>
        <script>
            
            window.indexedDB = window.indexedDB ||
                               window.mozIndexedDB ||
                               window.webkitIndexedDB ||
                               window.msIndexedDB;
            window.IDBTransaction = window.IDBTransaction ||
                                    window.webkitIDBTransaction ||
                                    window.msIDBTransaction;
            window.IDBKeyRange = window.IDBKeyRange ||
                                 window.webkitIDBKeyRange ||
                                 window.msIDBKeyRange;
            window.IDBCursor=window.IDBCursor || window.webkitIDBCursor ||window.msIDBCursor;
        
            function versionUpdata(){
                  var dbName = "indexedDBtest";
                  var dbVersion = 2;
                  var idb;
                  var dbConnect = indexedDB.open(dbName,dbVersion);
                  dbConnect.onsuccess = function(e){
                         idb = e.target.result;
                         alert("数据库链接成功");                      
                  }
                   dbConnect.error = function(){
                            alert("数据库更新失败")                   
                   }
                    dbConnect.onupgradeneeded = function(e){
                          idb = e.target.result;
                          var tx = e.target.transaction;
                          var oldVersion = e.oldVersion;
                          var newVersion = e.newVersion;
                          alert("数据库更新成功"+oldVersion+"--"+newVersion);
                        
                    }
                
            }
        </script>
    </head>
    <body>
        <input type="button" value="链接数据库" onclick="versionUpdata()">
    </body>   
     
</html>

View Code

数据库indexDB

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数据库indexDB

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