form submit not working (using remodal.js )

code

<div class="remodal" data-remodal-id="modal">
<form action="/action" method="post">

    <button data-remodal-action="close" class="remodal-close"></button>
    <h1 class="modal-title">title</h1>
    <div class="modal-body">
        <p>~~~~~</p>
        <textarea class="modal-input" name="textarea"></textarea>
    </div>
    <button type="submit" class="modal-submit">submit</button>
</form>

Current Status

• modal window is shown.
• When I see chrome's developer tool, There was no form tag in html.
• when I press submit button, Nothing happens

Usage

• Laravel5
• Bootstrap4
• jQuery
• remodal.js

Thing I want to do

I just wanna submit form on modal window.

via Chebli Mohamed