how to keep a background image filling the div code example

Example 1: css fill div with background image

div {
  background-image: url("example.com/image.png");
  background-size: 100% 100%;
}

Example 2: background image fill div

div {
	background-image: url("example.com/image.png");
    background-repeat: no-repeat;
    background-size: cover;
}