Edit in JSFiddle

var Task = $data.define("Task", {
    Todo: String,
    Completed: Boolean,
    Priority: Number,
    DueDate: Date
});

Task.save({
    Todo: "Include script resources",
    Completed: false,
    Priority: 1,
    DueDate: new Date()
}).then(function() {
    //save() is async and returns a jQuery promise
  Task.readAll().then(function(taskArray) {
       //readAll() is async and returns a jQuery promise
        taskArray.forEach(function(task) {
            $('#output').append(JSON.stringify(task) + "<br />")
        });
  });
});
<script src="http://code.jquery.com/jquery-1.8.2.min.js"></script>
<script src="http://include.jaydata.org/jaydata.js"></script>

<h3>This example defines a Task entity then saves an instance and reads all instances back</h3>

<p>Open the developer console in Chrome, and see the databases on the Resources tab</p>

<div id="output">
</div>