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Just like how the
<meta name=viewport>tag tells the browser that your website is designed to work for small viewport sizes, the<meta name=text-scale>tells the browser, 'Hey, I've designed my website to still work if the user increases their OS text size.'
Never do pixel math with em and rem units. That’s where we went wrong, by assuming that 16px == 1em is a reliable fact. It reminds me a lot…
display: contents considered harmful
At this point, I don’t think we as an industry can use display: contents with confidence. Past actions are a good indicator of future behavior,…
Pixels vs. Relative Units in CSS: why it’s still a big deal
Remember, users really do change their settings under the hood, and we should be maintaining users’ control over their own browsing experience. If…
Why you should never use px to set font-size in CSS
Let’s be very clear: it absolutely does matter what unit you use in your CSS. And you should avoid px when setting font-size wherever possible.…
The Surprising Truth About Pixels and Accessibility: should I use pixels or rems?
Josh's attention to details in all his articles is awesome. Here, he's presenting evidences that the rem unit should be used for font sizes, media…
Josh Tumath 
Miriam Suzanne
Eric Bailey
Kathleen McMahon
Josh Collinsworth
Josh W. Comeau