Question

I have really basic question.
How can I get form id by input element id.

<form id="my_form">
    <fieldset>
        <!--some <div>'s-->
            <input id="my_input"></div>
        <!--some <div>'s end-->
    </fieldset>
</form>

Now if I have

var form_input = $('#my_input');

How can I get id “my_form”?

Thank you.

Answer 1

Use closest. It searches up the ancestors* of an element to find the first (closest) match.

$('#my_input').closest('form').attr('id');

*Note: closest() searches upwards starting with the current element, therefore it can match the current element.