Plan step 36 (inputs group): <x-datepicker> renders data-md-datepicker
with every part data-md-datepicker-* (data-md-presentation replaces
data-presentation; data-md-range, data-md-docked, data-md-concealed and
data-md-value replace their unprefixed hooks), and datepicker.css moves
into material.components on the same px, spacing and colour tokens,
importing field.css, icon.css and button.css for what the view renders.
The month's live-announced text drops its `sr-only` class for a
data-md-datepicker-month-live hook with the same visually-hidden clip
(a package view writes no class but the interaction classes), matching
field's and search's counter/status live regions. The day, year, menu
button and list option keep their own hand-rolled state layer and focus
ring rather than the foundation's classes, as data-md-field-button
already does: each is a bigger interactive box than the round indicator
drawn inside it, which the foundation's fixed-geometry classes can't
draw, and `:focus-visible` only ever matches the actually-focused
element. Cancel, OK and the icon buttons are <x-button>, which already
draws from the classes. datepicker.js follows the renamed hooks and
dataset properties.
Shift+M/Y (reaching the month/year dropdowns) and the full-screen range
picker at compact were already implemented; this commit adds the browser
tests the plan owed for them plus the month list's keyboard-driven growth
in both directions and Save/close from the full-screen app bar
(docs/plans/material-3-browser-tests.md), written but not run — the
inputs group's Chromium run follows this stream.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
