image class bootstrap code example

Example 1: how to make image responsive bootstrap 4

<img src="..." class="img-fluid" alt="Responsive image">

Example 2: responsive image in bootstrap

<img src="..." class="img-responsive">

Example 3: bootstrap image size

<div class="w-25 p-3" style="background-color: #eee;">Width 25%</div>
<div class="w-50 p-3" style="background-color: #eee;">Width 50%</div>
<div class="w-75 p-3" style="background-color: #eee;">Width 75%</div>
<div class="w-100 p-3" style="background-color: #eee;">Width 100%</div>

Example 4: bootstrap Image thumbnails

In addition to our border-radius utilities, you can use 
.img-thumbnail to give an image a rounded 1px border appearance.

<img src="..." alt="..." class="img-thumbnail">

Example 5: img-fluid bootstrap

<img class="img-fluid" src="" alt=""> //This will make your image responsive

Example 6: bootstrap image size

.food1 img {
    width:100%;
    height: 230px;
}