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Learn how to build smooth open/close popover animations using the HTML popover attribute, CSS Anchor Positioning, and @starting-style — zero JavaScript needed.

Google Developer Expert Raudy shares Modern Web Guidance at Google I/O Connect Berlin: a framework steering AI coding assistants to use native HTML/CSS over outdated JavaScript patterns.

Build animated, accessible popover components with zero JavaScript using modern CSS: the native Popover API, @starting-style, transition-behavior, and CSS Anchor Positioning. Includes full code examples.

No JavaScript needed — HTML's native popover attribute handles show, light dismiss, and Esc to close. Learn popover, popovertarget, CSS animations, and a11y support.