make an image responsive bootstrap code example
Example 1: bootstrap class align center image
class="mx-auto d-block"
Example 2: bootstrap Image thumbnails
In addition to our border-radius utilities, you can use
.img-thumbnail to give an image a rounded 1px border appearance.
Example 3: bootstrap image size
.top1 {
height:390px;
background-color:#FFFFFF;
margin-top:10px;
overflow: hidden;
}
.top1 img {
height:100%;
}