Bootstrap allows you to do a few useful things with images through the use of CSS classes. These things include: making images responsive, converting images to shapes, and aligning images. In the next section, I'll show you how to apply all these techniques to your images.
Bootstrap 4 comes with a new responsive image class that is super-handy when developing websites or web-based applications. When applying the class img-fluid to an <img> tag, it will automatically set the max-width of the image to 100% and the height to auto. The result will be an image that scales with the size of the device viewport. Here's what the code looks like:
<img src="myimage.jpg" class="fluid-image" alt="Responsive Image">
It's as easy as adding that class to the image to trigger the responsive controls. A word of advice: I would recommend making your images a little bit bigger than the maximum size you think you will need. That way, the image will...