css background image responsive height code example

Example 1: make a background image responsive css

html {
   min-height: 100%;
   background-image: url(image.jpg);
   background-size: cover;
   background-repeat: no-repeat;
   background-position: center center;
}

Example 2: scale down image css

img.resize {
    width: 540px; /* you can use % */
    height: auto;
}