About jQuery, why does the mouseenter() on a <input> not work?

Thanks for checking my post first!

The mouseenter() is working for the tag h2, but it does not work on the <input>. Could you tell what is wrong with my code?

$(document).ready(function() {
  $("h2").mouseenter(function() {
    $(this).css("background-color", "green");
  });

  $("input").mouseenter(function() {
    $(this).css("background-color", "green");
  });
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div>
  <h2>Select Gaming Time:</h2>
  <form method="post">
    <input type="radio" name="time" value="5">5 Minute (Hard) &nbsp;&nbsp;&nbsp;&nbsp;
    <input type="radio" name="time" value="8">8 Minutes (Normal) &nbsp;&nbsp;&nbsp;&nbsp;
    <input type="radio" name="time" value="10">10 Minutes (Easy)
  </form>
</div>

Solution

You are currently trying to turn the radio button's background green. Unfortunately this can't be done. You can however wrap the text next to the radios in a label and turn the label's background green.

As an added benefit you can make the label clickable as well using the for="" attribute and corresponding id=""s.

Also, this can be done using css only h2:hover, label:hover { background- color: green; }. Saving you a lot of bytes to load!

A. Wolff's code copied over from this jsfiddle:

$(document).ready(function () {
    $("h2").mouseenter(function () {
        $(this).css("background-color", "green");
    });

    $("label:has(:radio)").mouseenter(function () {
        $(this).css("background-color", "green");
    });
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div>
    
<h2>Select Gaming Time:</h2>

    <form method="post">
        <label for="time_5">
            <input type="radio" name="time" value="5" id="time_5">5 Minute (Hard) &nbsp;&nbsp;&nbsp;&nbsp;</label>
        <label for="time_8">
            <input type="radio" name="time" value="8" id="time_8">8 Minutes (Normal) &nbsp;&nbsp;&nbsp;&nbsp;</label>
        <label for="time_10">
            <input type="radio" name="time" value="10" id="time_10">10 Minutes (Easy)</label>
    </form>
</div>