Function on

src/utils/codejar.ts:104–107

(type: K, fn: (event: HTMLElementEventMap[K]) => void)

  }, 300)

  const on = <K extends keyof HTMLElementEventMap>(type: K, fn: (event: HTMLElementEventMap[K]) => void) => {
    listeners.push([type, fn])
    editor.addEventListener(type, fn)
  }

  on('keydown', event => {
    if (event.defaultPrevented) return