.ajax() ブロックの外側で jQuery AJAX 成功コールバック関数を定義する方法

<code class="javascript">function getData() {
    return $.ajax({
        url: 'example.com',
        type: 'GET'
    });
}</code>

<code class="javascript">getData().done(handleData);</code>

<code class="javascript">function handleData(data) {
    alert(data);
    // Do other stuff
}</code>

<code class="javascript">// A trivial timer for demo purposes
var timer = $.Deferred();
setTimeout(timer.resolve, 5000);

// Add a `done` and an `error` handler to the AJAX call
var ajax = getData().done(handleData).fail(error);

// Wait for both the AJAX call and the timer to finish
$.when(timer, ajax).done(function() {
    // Both operations have finished
});

// Add an additional `done` handler to the AJAX call
ajax.done(function() {
    // Can be added even if the AJAX call has already finished
});</code>