javascript - prop('disabled', false); is not working - Stack Overflow

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I want to make a button that will be disable when checkbox is false. But prop('disabled', false); isn't working.

$(function() {
    $(this).click(function() {
        if ($('#аgree').prop(':checked')) {
            $('#button').prop('disabled', false);
        } else {
            $('#button').prop('disabled', true);
        }
    });
});

<script src=".1.1/jquery.min.js"></script>
<p class="text-center">З правилами анкетування ознайомлений(а) і згоден(на) @Html.CheckBox("Agree", false, new { id = "agree" }) </p>
<p class="text-center"><input type="button" id="button" disabled="disabled" value="Пройти анкетування" onclick="location.href='@Url.Action("Form")'" /></p>

I want to make a button that will be disable when checkbox is false. But prop('disabled', false); isn't working.

$(function() {
    $(this).click(function() {
        if ($('#аgree').prop(':checked')) {
            $('#button').prop('disabled', false);
        } else {
            $('#button').prop('disabled', true);
        }
    });
});

<script src="https://ajax.googleapis./ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p class="text-center">З правилами анкетування ознайомлений(а) і згоден(на) @Html.CheckBox("Agree", false, new { id = "agree" }) </p>
<p class="text-center"><input type="button" id="button" disabled="disabled" value="Пройти анкетування" onclick="location.href='@Url.Action("Form")'" /></p>

• javascript
• jquery
• prop

Share Improve this question Follow edited Oct 10, 2017 at 20:27 CDspace 2,6891919 gold badges3232 silver badges3939 bronze badges asked Oct 10, 2017 at 20:21 Dmytro PetrenkoDmytro Petrenko 2311 gold badge11 silver badge66 bronze badges 0

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4 Answers 4

Sorted by: Reset to default 3

In your code, this refers to the DOM.

Change it to

$("#agree").change(function() {
    if ($(this).is(':checked')) {
        $('#button').prop('disabled', false);
    } else {
        $('#button').prop('disabled', true);
    }
});

Inside the event handler, this refers to the element that triggered the change event.

or simply:

$("#agree").click(function() {
    $('#button').prop('disabled', !$(this).is(':checked'));
});

You can try removing the attribute.

$('#button').removeAttr('disabled')

Check if the checkbox is checked with .is(":checked"), also, listen to a change event on the checkbox itself.

Below is a little modified code (to make it work here)

$(function() {
    $('#agree').change(function() {
        if ($(this).is(':checked')) {
            $('#button').prop('disabled', false);
        } else {
            $('#button').prop('disabled', true);
        }
    });
});

<script src="https://ajax.googleapis./ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p class="text-center">З правилами анкетування ознайомлений(а) і згоден(на) <input type=checkbox id=agree> </p>
<p class="text-center"><input type="button" id="button" disabled="disabled" value="Пройти анкетування" onclick="location.href='@Url.Action("Form")'" /></p>

To disable button, you can use:

$('#button').attr('disabled', 'disabled');

To make button active, you can use:

$('#button').attr('disabled', '');

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