Currently, I am revisiting some older code and working on arranging the content properly on my webpage. However, I have encountered an issue: while my flex properties are functioning correctly, the '.justify-content-...' is not working as expected.
Below is a snippet of my code:
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
<h3 class="titre-jumbotron-video text-center mb-2 mt-3">Parameters</h3>
<div class="max-min d-flex flex-column mt-1 mb-4 mx-auto" style="width: 95%">
<fieldset>
<div class="row">
<div class="col-4">
<div class="d-flex flex-column justify-content-start">
<div>
<p>Some content</p>
</div>
<div>
<label>Other type of content : </label>
<input type="checkbox">
</div>
</div>
</div>
<div class="col-4">
<div class="d-flex flex-column justify-content-center">
<img id="apercuGraphe" src="https://i.kym-cdn.com/photos/images/newsfeed/001/504/739/5c0.jpg" alt="Apercu Graphe" width="200px">
</div>
</div>
<div class="col-4">
<div class="d-flex flex-column justify-content-end">
<div>
<label>Content 1 : </label>
<input type="text">
</div>
<div>
<label>Content 2 : </label>
<input type="text">
</div>
<div>
<label>Content 3 : </label>
<select>
<option value="auto">Automatic</option>
</select>
</div>
</div>
</div>
</div>
</fieldset>
</div>
It seems like there might be something that I am misunderstanding, but I'm unsure what it could be.
PS: Please expand the snippet to view it on a larger screen.