Images

Documentation and examples for opting images into responsive behavior (so they never become wider than their parent) and add lightweight styles to them—all via classes.
Responsive Images
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 width.
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Image Thumbnails
You can use .img-thumbnail to give an image a rounded 1px border appearance.
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Aligning Images
Align images with the .float-start for the left and .float-end for the right.
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Add .mx-auto .d-block to tag img for align center.
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Rounded Images
Add .rounded to tag img make image conner radius.
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