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chore: clarify repeated w-ref behavior - #490

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Mohamed Mansour (mohamedmansour) merged 1 commit into
microsoft:mainfrom
mohamedmansour:mohamedmansour-verify-repeated-template-refs
Aug 26, 2026
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Mohamed Mansour (mohamedmansour) merged 1 commit into
microsoft:mainfrom
mohamedmansour:mohamedmansour-verify-repeated-template-refs

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w-ref is a scalar component-property binding, but the documentation did not state what happens when the same ref name appears inside <for>. This could incorrectly imply that repeat keys or positions create an indexed ref collection.

  • Clarify that the last wired occurrence wins.
  • State that repeat key and position are not imperative lookup contracts.
  • Recommend stable authored IDs with getElementById() or item components for identity-based lookup.
  • Keep the AI authoring reference aligned with the public interactivity guide.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
@mohamedmansour
Mohamed Mansour (mohamedmansour) merged commit 8489137 into microsoft:main Aug 26, 2026
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@mohamedmansour
Mohamed Mansour (mohamedmansour) deleted the mohamedmansour-verify-repeated-template-refs branch August 26, 2026 04:55
Mohamed Mansour (mohamedmansour) added a commit that referenced this pull request Aug 26, 2026
## Release

Bumps WebUI to `0.0.26`.

Previous release tag: `v0.0.25`

## Changes since `v0.0.25`

Features:

- Python hosts now have an official typed PyO3 renderer package with
buffered, partial, template, token, and host-driven streaming APIs
(feat: add official Python renderer package #453 by @mohamedmansour).
- Progressive SSR can place transport-flushed streaming boundaries
inside reusable components while preserving component ownership and
continuation state (feat: support component-local streaming boundaries
#460 by @mohamedmansour).
- Components can defer compiler-owned hydration until interaction, with
router preload handoff and a combined lazy-render policy (feat: add
compiler-driven interaction hydration #485 by @mohamedmansour).
- Builds can opt into global Light DOM CSS while preserving explicit
authored Shadow roots and deterministic style closures (feat: make Light
DOM a global CSS opt-in #429 by @mohamedmansour).
- State projection supports application-owned TypeScript 7.0.2 while
retaining the TypeScript 6 migration path (feat: support TypeScript 7
projection compilation #452 by @mohamedmansour).
- WebUI Press supports layout-scoped compile-time named regions with
fallback HTML, state, components, and scripts (feat(press): add
compile-time named regions #484 by @mohamedmansour).
- FAST v2 and v3 gain plugin-owned local and npm component discovery
with validated FAST template transformation (feat: add plugin-owned FAST
component discovery #378 by @janechu).

Fixes:

- Missing condition identifiers are treated as falsy before negation and
logical evaluation, aligning SSR with the browser runtime (fix: negate
missing condition paths correctly #449 by @mohamedmansour).
- FAST route state now scales through escaped scalar kebab-case
attributes shared by FAST v2 and v3 (fix: scale FAST route state with
scalar attributes #450 by @janechu).
- Dynamic Link-mode components wait for native stylesheet readiness
across navigation and component assets, preventing unstyled flashes
(fix: prevent dynamic component stylesheet flashes #454 by
@mohamedmansour).
- Authored component definitions defer whenever compiled template
metadata has not arrived, including ordinary router navigation (fix:
defer authored define() whenever template metadata is missing #461 by
@mohamedmansour).
- Client structural updates preserve authored order and sibling
ownership for shared slots and raw HTML ranges (fix: preserve source
order for shared structural slots #465 by @mohamedmansour, fix: preserve
siblings around raw HTML updates #466 by @mohamedmansour).
- Native-element attributes no longer leak into the local state of a
later component (perf(handler): stop native attributes leaking into
component state #469 by @mohamedmansour).
- Templates-and-state-only SSR bootstrap payloads no longer require
component style metadata (fix: allow SSR bootstrap without component
styles #475 by @mohamedmansour).
- The high-level Rust `serve_request` path now preserves complete render
options, including CSP nonces, while sharing the same entry and request
path with partial rendering (fix: forward CSP nonces through
serve_request #488 by @mohamedmansour).
- Projection compilation bounds source reads, excludes binary and
unsupported-loader inputs from semantic analysis, and preserves
deterministic cleanup under large esbuild graphs (fix: bound projection
adapter source reads #489 by @mohamedmansour).
- Router pending UI remains mounted through pre-commit work and settles
at the synchronous DOM commit, with stale, aborted, and re-entrant
navigation cleanup kept generation-safe (fix: settle router pending UI
during navigation commits #491 by @mohamedmansour).

Docs:

- The documentation site adds accessible responsive navigation, improved
reading layouts, stronger search behavior, and Playground recovery
states (feat: polish WebUI documentation experience #459 by
@mohamedmansour).
- Slot-resolution implementation guidance now documents pre-order
lookup, pending placement ownership, and marker handling (chore: clarify
slot resolution comments #471 by @mohamedmansour).
- Repeated `w-ref` behavior is now explicit: refs are scalar and the
last wired occurrence wins, while stable authored IDs or item components
provide identity-based lookup (chore: clarify repeated w-ref behavior
#490 by @mohamedmansour).

Maintenance:

- Release and package policy metadata now constrains the transitive h2
advisory, uses SPDX NuGet licensing, and classifies publishing jobs
correctly (chore: allow constrained h2 advisory #451 by @janechu, fix:
use modern NuGet license metadata #457 by @janechu, chore: mark
publishing jobs as release jobs #458 by @janechu).
- The development and CI Rust toolchain is updated to 1.98 with the
resulting warnings resolved (Update rust toolchain version and fix
clippy warning #462 by @telecos).
- Release builds use Thin LTO to retain cross-crate optimization with
faster linking (perf: switch release builds to Thin LTO #464 by
@mohamedmansour).
- Handler and expression hot paths reduce attribute vtable calls, render
lookup and scope allocations, and single-term condition overhead
(perf(handler): centralize HTML attribute writing in ResponseWriter #467
by @mohamedmansour, perf(expressions): fast-path single-term conditions
#470 by @mohamedmansour, perf(handler): reduce render lookup and scope
allocations #472 by @mohamedmansour).
- Node rendering can reuse immutable prepared-state snapshots and
bounded per-route output capacity hints (perf(node): reuse prepared
state across renders #477 by @mohamedmansour, perf: reuse Node render
output capacity #478 by @mohamedmansour).
- Framework hydration releases bootstrap data sooner and reduces
allocations for bindings, empty hosts, and visible conditionals (perf:
reduce framework hydration allocations #479 by @mohamedmansour, perf:
release SSR bootstrap memory after hydration #480 by @mohamedmansour,
perf: reduce empty template host overhead #482 by @mohamedmansour, perf:
remove visible conditional anchors #483 by @mohamedmansour).
- Benchmark tooling now renders the full contact workload, runs
Criterion baselines per target, and restores the streaming hydration
fixture (fix(bench): render contacts in contact-book benchmark #468 by
@mohamedmansour, fix(xtask): run Criterion benchmarks per target #473 by
@mohamedmansour, fix: repair streaming hydration benchmark fixture #476
by @mohamedmansour).

## Validation

- `cargo xtask check`

---------

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
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