Images in Bootstrap are made responsive with .img-fluid. max-width: 100%; and height: auto; are applied to the image so that it scales with the parent element.
<img src="..." class="img-fluid" alt="Responsive image">
Images in Bootstrap are made responsive with .img-fluid. max-width: 100%; and height: auto; are applied to the image so that it scales with the parent element.
<img src="..." class="img-fluid" alt="Responsive image">