make background full width css code example
Example 1: css background image size to fit screen
html {
height: 100%
}
body {
background-image:url("../images/myImage.jpg");
background-repeat: no-repeat;
background-size: 100% 100%;
}
Example 2: how to cover full background with css
<div id="bg">
<img src="images/bg.jpg" alt="">
</div>