Does iFrame load after JS error?
Spoiler: yes, yes it does.
by nathanlogan
HTML
<script>
// here's a blocking error
alert(
// as demonstrated by us not getting here
alert('We made it through!')
</script>
<iframe id="inlineFrameExample"
title="Inline Frame Example"
width="300"
height="200"
src="https://www.openstreetmap.org/export/embed.html?bbox=-0.004017949104309083%2C51.47612752641776%2C0.00030577182769775396%2C51.478569861898606&layer=mapnik">
</iframe>