Figures - Do you use the right HTML/CSS code to add images and captions?

Most developers put the image and the caption in a DIV tag, where the figure is just a paragraph - this is not correct.

<div>
    <img alt="" />  
  <p>Figure: Caption</p>
</div>

Instead, you should use <figure> and <figcaption> as per https://www.w3schools.com/TAGS/tag_figcaption.asp. This structure gives semantic meaning to the image and figure:

<figure>
  <img src="image.jpg" alt="image"></img src="image.jpg" alt="image">
  <figcaption>Figure: Caption</figcaption>
</figure>

The old way

For some internal sites, we still use the old way to place images: Using  <dl> ,  <dt> (which is the item in the list – in our case an image), and <dd> for a caption.

<dl class="badImage">
  OR
  <dl class="goodImage">
    <dt><img src="image.jpg" alt="Image" /></dt>
    <dd>Figure: Caption</dd>
  </dl>
</dl>

Figure: Old way example