quartz-research-note/quartz/components/scripts/util.ts

export function registerEscapeHandler(outsideContainer: HTMLElement | null, cb: () => void) {
  if (!outsideContainer) return
  function click(this: HTMLElement, e: HTMLElementEventMap["click"]) {
    if (e.target !== this) return
    e.preventDefault()
    cb()
  }

  function esc(e: HTMLElementEventMap["keydown"]) {
    if (!e.key.startsWith("Esc")) return
    e.preventDefault()
    cb()
  }

  outsideContainer?.removeEventListener("click", click)
  outsideContainer?.addEventListener("click", click)
  document.removeEventListener("keydown", esc)
  document.addEventListener('keydown', esc)
}

export function removeAllChildren(node: HTMLElement) {
  while (node.firstChild) {
    node.removeChild(node.firstChild)
  }
}