Performance · 15 points
Blocking scripts
One check, stated three ways: what we measure, what would make it wrong, and how to confirm it yourself.
What this measures
<script src> elements inside <head> with no async, defer or type=module.
Where this check can be wrong
One blocking script that sets up a consent banner is a deliberate trade-off, and inline critical CSS or module loaders can look blocking without being one.
Verify it without taking our word for it
document.querySelectorAll('head script[src]:not([defer]):not([async]):not([type="module"])').length in your console.