no css support code example

Example 1: css supports

@supports (display: grid) {
  div {
    display: grid;
  }
}
@supports not (display: grid) {
  div {
    float: right;
  }
}

Example 2: css not class

/* Style everything but the .different class */
li:not(.different) {
  font-size: 3em;
}