Dermot Duffy
ea251ca988
Closes #2531. ## Summary The full `nunjucks` templating engine (~226KB) plus `ha-nunjucks` (~46KB) — roughly **272KB, ~13% of the eager entry chunk** — was statically imported and downloaded by every card on initial load, even though templates only apply when a config value contains a `{{ … }}` / `{% … %}` delimiter. Most cards use no templates and never need the engine. This defers the engine behind a dynamic `import('ha-nunjucks/dist')` so it ships in a separate, on-demand chunk instead of the eager `card-*.js`. ## Approach The render path (`TemplateRenderer.renderRecursively`) is **kept synchronous** — it is called from many synchronous hot paths (condition/trigger evaluators, picture-elements rendering, actions, folder matchers), and making it async would be a large, high-risk refactor of the evaluation core. Instead: - **New `src/card-controller/templates/engine.ts`** — a module-level singleton lazy loader (`loadTemplateEngine()` / `getTemplateEngine()`) shared across all `TemplateRenderer` instances, plus a `containsTemplate()` delimiter helper. - **Delimiter gating** — strings without a delimiter never touch the engine (the overwhelming majority of renders). - **Pre-warm at config time** — because every template string originates in the config, a new mandatory `TEMPLATE_ENGINE` initialization aspect loads the engine before first render whenever the config contains a delimiter. This **guarantees no raw `{{ … }}` flash**: content/condition rendering is blocked until the engine is present for template-using cards. Cards without templates never load it. ## Result - nunjucks + ha-nunjucks move out of the eager chunk into a separate chunk fetched only when a card actually uses templates. - No change to the synchronous public render API; condition/trigger evaluation core untouched. ## Tests - New `engine.ts` loader coverage (concurrent load, cached reuse, not-loaded fallback). - The 11 existing test files that render real (delimiter-bearing) templates declare their dependency explicitly via `beforeAll(loadTemplateEngine)` — no global/implicit setup hook. - Full suite green (4764 tests), lint and ts-prune clean, per-file 100% coverage maintained for the affected directories. 🤖 Generated with [Claude Code](https://claude.com/claude-code) https://claude.ai/code/session_016ykWemdkZrgywvC71pHc6c --- _Generated by [Claude Code](https://claude.ai/code/session_016ykWemdkZrgywvC71pHc6c)_
Advanced Camera Card
Formerly known as: Frigate Card
A comprehensive camera card for Home Assistant.
- Live viewing of multiple cameras.
- Clips, snapshot and review browsing via mini-gallery.
- Automatic updating to continually show latest clip / snapshot.
- Support for filtering events by zone and label.
- Arbitrary entity access via menu (e.g. motion sensor access).
- Fullscreen mode.
- Grid or carousel/swipeable media, thumbnails and cameras.
- Direct media downloads.
- Lovelace visual editing.
- Full Picture Elements support.
- Theme friendly.
See full documentation.