<div id="demo" class="yui3-skin-sam">

<label for="ac-input">Enter a GitHub username:</label><br>

<input id="ac-input" type="text">

</div>

<script>

YUI().use('autocomplete', 'autocomplete-highlighters', function (Y) {

Y.one('#ac-input').plug(Y.Plugin.AutoComplete, {

resultHighlighter: 'phraseMatch',

resultListLocator: 'users',

resultTextLocator: 'username',

source: 'http://github.com/api/v2/json/user/search/{query}?callback={callback}'

});

});

</script>