@blackglory/wait-for/src/wait-for-dom-content-loaded.ts

A module for waiting for things to happen.

export function waitForDOMContentLoaded(): Promise<void> {
  return new Promise(resolve => {
    if (document.readyState === 'loading') {
      document.addEventListener('DOMContentLoaded', () => resolve(), { once: true })
    } else {
      resolve()
    }
  })
}