Deferred WebSQL execute query

gistfile1.txt

(function () {
    // size the database to 3mb.
    var dbSize = 3 * 1024 * 1024,
        myDb = window.openDatabase('myDb', '1.0', 'My Database', dbSize);
 
    function runQuery() {
        return $.Deferred(function (d) {
            myDb.transaction(function (tx) {
                tx.executeSql("select ? as Name", ['Juca'], 
                successWrapper(d), failureWrapper(d));
            });
        });
    };
 
    function successWrapper(d) {
        return (function (tx, data) {
            d.resolve(data)
        })
    };
 
    function failureWrapper(d) {
        return (function (tx, error) {
            d.reject(error)
        })
    };
 
    $.when(runQuery()).done(function (dta) {
        alert('Hello ' + dta.rows.item(0).Name + '!');
    }).fail(function (err) {
        alert('An error has occured.');
        console.log(err);
    });
 
})()