1<!DOCTYPE html> 2<meta charset="utf-8"> 3<title>Incumbent page used as a test helper</title> 4 5<iframe src="relevant/relevant.html" id="r"></iframe> 6<iframe src="current/current.html" id="c"></iframe> 7 8<script> 9const relevant = document.querySelector("#r"); 10const current = document.querySelector("#c"); 11 12window.runWindowOpenVeryIndirectly = (...args) => { 13 return current.contentWindow.open.call(relevant.contentWindow, ...args); 14}; 15</script> 16