set background image for div css code example

Example 1: how to add a background image in html

<!-- HTML -->
<div id="imageDiv"></div>

<!-- CSS -->
<style>
  #imageDiv {
	background-image: url('someimage.png');
  }
</style>

Example 2: background image for div in grid system bootstrap

.img {
    margin-right: -15px; // Remove right gap
    margin-left: -15px;  // Remove left gap
    padding-bottom: 62.5%; // ratio is 16:10
    background-position: 50% 50%;
    background-repeat: no-repeat;
    background-size: cover;
}