<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width,minimum-scale=1">
<title>Two cross origin iframe Test Case</title>
<style>
iframe {
position: absolute;
width: 50vw;
height: 50vh;
top: 0;
left: 0;
border: 0;
}
#topframe {
z-index: 5;
background-color: darkred;
}
#bottomframe {
z-index: 1;
background-color:lightblue;
}
</style>
</head>
<iframe id="topframe"></iframe>
<iframe id="bottomframe"></iframe>
<script>
const topframe = document.getElementById('topframe');
const bottomframe = document.getElementById('bottomframe');
let topframeLoaded = false;
let bottomframeLoaded = false;
topframe.addEventListener('load', () => {
topframeLoaded = true;
});
bottomframe.addEventListener('load', () => {
bottomframeLoaded = true;
});
</script>
</html>
