1
#map {
2
  height: calc(100vh - 84px);
3
  height: calc((var(--vh, 1vh) * 100) - 84px);
4
}

1
let vh = window.innerHeight * 0.01;
2
// Then we set the value in the --vh custom property to the root of the document
3
document.documentElement.style.setProperty("--vh", `${vh}px`);