expandallgithub.js

const delay = (ms) => {
  return new Promise(resolve => setTimeout(resolve, ms));
}

const getExpandButtons = () => {
	return Array.from(document.querySelectorAll("[title='Expand Down']")).concat(Array.from(document.querySelectorAll("[title='Expand All']")))
}

const expandAll = async () => {
	let expand_buttons = getExpandButtons();
	while (expand_buttons.length) {
	  for (let i = 0; i < expand_buttons.length; i++) {
	    expand_buttons[i].click()
	    await delay(50)
	  }
	   expand_buttons = getExpandButtons();
	}
}

expandAll();