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Hone your craft to be better than average.

CSS custom properties don't work in media queries. Custom media queries could help out here but unfortunately, they're not supported yet.

em and strong elements are not announced by assistive technologies such as screen readers.

Input elements of type email and file support the multiple attribute which allows entering multiple email addresses.

Use Twitter's "hidden" embed API to statically prerender Tweets on your sites.

The CSS zoom property, unlike scale, affects an element's layout size, not just its visual appearance.

The new field-sizing CSS property allows inputs, selects and textareas to grow depending on their content.

The inert HTML attribute enables you to make entire web page areas inaccessible.

Intl.NumberFormat supports localized currency and unit formating.

Thoughts on stage fright.