Native Interactive Elements 1: details/summary, dialog, popover and Invoker Commands
Modals, popovers and accordions are now in HTML: with Invoker Commands (command/commandfor, Baseline 2025-12), dialogs and popovers open and close without a line of JavaScript, and the browser manages focus and inert. In this post we measure Bookstore's "Delete book" confirmation, mini cart and FAQ accordion in Chromium, and cover the returnValue trap, requestClose(), :open, and closedby, popover="hint" and hidden="until-found", which Safari lacks, as progressive enhancement.
14 Nov 2026
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12 min
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