<!DOCTYPE html>
<style>
html {
border: 1px solid blue;
box-sizing: border-box;
width: 100%;
height: 100%;
}
</style>
<script>
document.addEventListener('touchstart', function(e) {
parent.onTouchStart(e);
});
</script>
Iframe
<!DOCTYPE html>
<style>
html {
border: 1px solid blue;
box-sizing: border-box;
width: 100%;
height: 100%;
}
</style>
<script>
document.addEventListener('touchstart', function(e) {
parent.onTouchStart(e);
});
</script>
Iframe