How to open Bootstrap Modal from a button click in React - reactjs

Question

I'm quite new to React and Bootstrap. I'm trying to implement a modal dialog on button click. My modal currently is not displaying - you can see on the 2nd snippet of code how I'm trying to include the modal using a boolean show variable.
I've seen various libraries which help to do this but I wanted to try understand how to make this work without those libraries first.
I'm not sure why this modal does not show.
const ModalContent = () => {
return (
<div className="modal">
<div className="modal-dialog">
<div className="modal-content">
<div className="modal-header">
<h5 className="modal-title">Modal title</h5>
<button type="button" className="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
</div>
<div className="modal-body">
<p>Modal body text goes here. {modalInfo}</p>
</div>
<div className="modal-footer">
<button type="button" className="btn btn-secondary" data-bs-dismiss="modal">Close</button>
<button type="button" className="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
);
}
<div className="row">
<div className="col">
<table className="table table-hover">
...
</table>
<Pagination itemsCount={filtered.length}
pageSize={pageSize}
currentPage={currentPage}
onPageChange={handlePageChange}/>
</div>
{show ? <ModalContent /> : null}
</div>

Answer 1

2 words, conditional rendering is the best way to do it. Like this:
<div className="row">
<div className="col">
<table className="table table-hover">
...
</table>
<Pagination itemsCount={filtered.length}
pageSize={pageSize}
currentPage={currentPage}
onPageChange={handlePageChange}/>
</div>
{show && <ModalContent />}
</div>
the logic behind it is like this , if both sides of & operator are true , they will be rendered , if not, none of them will render, therefore causing the modal to not render at all.

Answer 2

Looking at the documentation, you are missing the button which should toggle the modal.
Page: https://getbootstrap.com/docs/4.0/components/modal/
<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
Launch demo modal
</button>
<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
You can also setup a custom trigger using with this line of code:
Call a modal with id myModal with a single line of JavaScript:
$('#myModal').modal(options)
Options: https://getbootstrap.com/docs/4.0/components/modal/#options
(Not tested) you could also try to use Document.getElementById() to get the element and call modal.
That said, I don't know if it is a good idea to use jQuery when you already use React, but I think you already know that there is an implementation for React Bootstrap already.