I love how this tweet ended up:
@csswizardry presented an antipattern,
@addyosmani and @rick_viscomi paved out the way so
@____lighthouse warns developers about it and
@kraft added a fix for
@jetpack. Thousands of developers will benefit from this collaboration 🙌
I see this pattern all the time—using both async and defer to capture better browser support—but it’s actually a huge antipattern. All browsers support both, but no matter the order of the attributes, async—the older of the two—always wins.