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selector - jQuery is not finding elements

jQuery is not finding any elements. alert($("#testbutton").length); displays 0 every time.

Am I doing something wrong?

My JS / jQuery code:

(function ($) {
    alert($("#testbutton").length);
}) (jQuery);

My HTML:

<html>
    <body>
        <div id="header">
            <div class="button" id="testbutton">Test</div>
        </div>
    </body>    
</html>
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1 Answer

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by (71.8m points)

When your code runs the DOM is not ready so the element doesn't exist. Did you mean to do this instead (passing a function to jQuery is a shortcut for $(document).ready(fn)):

$(function () {
    alert($("#testbutton").length);
});

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