indexedDb的基本使用

浏览器内置数据库

                // 数据库demo
        var testDB = window.indexedDB.open("testDB", 4);
        var db;
        testDB.onsuccess  = function(event){
            console.log("成功打开DB");
            db = event.target.result;
            //创建表
            var objectStore = database.createObjectStore("students", { keyPath: rollNo });
            //创建事物
            var tran = db.transaction(["students"],"readwrite");
            //获取表
            var objectStore = tran.objectStore("students");
            //往表添加数据
            objectStore.add({rollNo: '1', name: 'mxp'});
            //根据主键获取数据
            var mxp = objectStore.get('1');
            //获取成功回调
            mxp.onsuccess = function(event){
                console.log("Name : "+mxp.result.name);    
            };
        }