Documentation and examples for opting images into responsive behavior (so they never become larger than their parent elements) and add lightweight styles to them—all via classes.
Images in Bootstrap are made responsive with .img-fluid. This applies max-width:
100%; and height: auto; to the image so that it scales with the parent
element.
<img src="..." class="img-fluid" alt="...">In addition to our border-radius utilities, you can use .img-thumbnail to give an image a
rounded 1px border appearance.
<img src="..." class="img-thumbnail" alt="...">Align images with the helper float classes or text alignment classes. block-level images
can be centered using the .mx-auto margin utility class.
<img src="..." class="rounded float-start" alt="...">
<img src="..." class="rounded float-end" alt="..."><img src="..." class="rounded mx-auto d-block" alt="..."><div class="text-center">
<img src="..." class="rounded" alt="...">
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