Answers for "background image in css w3schools"

css background image

background-image: url("image.png");
background-position: center;
background-repeat: no-repeat;
background-size: cover;

background image css

.wrapper {
    background: url('./images/homeBg.png') no-repeat;
    background-size: 100vw; 
    float: left;
    height: 100vw;
    width: 100vw;
}

background image css

html,body {
  background-image: url("your.picture");
}

css background image

background-image: url("image.gif");