Focus styles and programmatic focus
:focus, :focus-visible and the JavaScript .focus() method

Building a tooltip with the popover API
Building a toggletip using the popover API

Do JavaScript frameworks still need portals?
Problems solved by the HTML dialog element, popover attribute and CSS anchor positioning

Popovers and anchor positioning
CSS anchor positioning and the popover API

What's new with dialog
Zero-JavaScript modals, light dismiss functionality, toggle events and more...

Formatting dates and times in JavaScript with Temporal and the Internationalization API
Human-readable dates and times without a library

Get a Unix timestamp with the Temporal API
Get a Unix timestamp using Temporal.Instant or Temporal.ZonedDateTime

Date pickers and the Temporal API
ISO 8601, date and time inputs, and the Temporal API

Temporal: a modern JavaScript API for date and time
Dates and time in JavaScript

Cookie Store API
A modern asynchronous alternative to document.cookie
