grid-template-areas

wrapper {

    display: grid;

    grid-template-columns: repeat(9, 1fr);

    grid-auto-rows: minmax(100px, auto);

    grid-template-areas:

      "hd hd hd hd   hd   hd   hd   hd   hd"

      "sd sd sd main main main main main main"

      "ft ft ft ft   ft   ft   ft   ft   ft";

}

/* Keyword value */
grid-template-areas: none;

/* <string> values */
grid-template-areas: "a b";
grid-template-areas: "a b b"
                     "a c d";

/* Global values */
grid-template-areas: inherit;
grid-template-areas: initial;
grid-template-areas: unset;

.container {
  display: grid;

  grid-template-columns: 2fr 2fr 1fr 2fr;
  grid-template-rows: 100px 200px 100px;

  grid-template-areas:
    "head head . side"
    "main main . side"
    "footer footer footer footer";
}