How to style images
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.
Making images responsive
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"> ...
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