react-examples/professional_javascript_for_web/ch14/FocusExample01.htm at master · zhangjunhd/react-examples · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>Focus Example</title>
    <script type="text/javascript" src="EventUtil.js"></script>
</head>
<body>
    <p>The textbox will receive focus as soon as the page loads. You can then start typing.</p>
    <form method="post" action="javascript:alert('Form submitted!')" id="myForm">
        <div>
            <label for="comments">Any comments?</label><br>
            <textarea rows="10" cols="50" id="comments" name="comments" autofocus></textarea>
        </div>
        <input type="submit" value="Submit Form" id="submit-btn">
    </form>
    <script type="text/javascript">
        EventUtil.addHandler(window, "load", function(event){
            var element = document.forms[0].elements[0];

            if (element.autofocus !== true){
                element.focus(); console.log("JS focus");
            }
        });

    </script>
</body>
</html>