Canvas area lifecycle

Canvas lifecycle issues usually come from missing mounts, zero-size containers, stale listeners, route transitions, hidden tabs, or assets that are not ready when rendering starts.

Lifecycle phases

• Resolve the mount or headless output.
• Load assets: media, fonts, paths, spritesheets, and textures.
• Create parameters, data tables, inputs, graph nodes, state machines, and renderer resources.
• Start or pause playback according to scene timeline, page state, and visibility.
• Dispose on route, modal, section, or preview teardown.

Sizing rules

• width and height are authored pixel dimensions.
• viewport.responsive, fit, alignment, minScale, and maxScale determine how the render adapts.
• A visible Canvas should never rely on a zero-size mount. Check computed size in browser verification.

Runtime controls

• play() starts Canvas timelines and media playback where applicable.
• pause() pauses Canvas timelines and media playback where applicable.
• dispose() releases graph, listener, renderer, asset, and state-machine resources held by the load result.

Verified runnable example

This guide points to proof-backed sample coverage. The full ledger lives in Generated examples and proof log.

Canvas: Fill rule diagnostic

• Source: faster-motion/demo/tests/canvas/fillrule-diagnostic/fillrule-diagnostic.fmtion
• Expected output: A contained Canvas scene renders paired path cases so nonzero and evenodd fill handling can be compared visually.
• Validation: Schema validation passed. Runtime proof reports zero blocking runtime issues and 10 rendered objects; the accepted metadata note is preserved in the proof ledger.
• Desktop proof: generated-assets/faster-motion-docs/proofs/screenshots/canvas-fillrule-diagnostic-desktop.png
• Mobile proof: generated-assets/faster-motion-docs/proofs/screenshots/canvas-fillrule-diagnostic-mobile.png

Guide-specific sample target: Lifecycle sample that loads, plays, pauses, resizes, disposes, and remounts without duplicate listeners or blank frames.

Faster Motion docs

Use this local map together with the left navigation. The source-backed content tree controls the main article order; this section keeps related pages one click away.

Start

• Faster Motion docs map
• Faster Motion documentation overview
• Get started with Faster Motion
• Faster Motion concepts
• .fmtion file format

DOM animation

• DOM animation guide
• DOM selectors and targets
• Scroll animation
• Pointer, hover, and drag inputs
• Text, SVG, and path animation
• Responsive gates and parameter overrides

Canvas animation

• Canvas animation guide
• Canvas area lifecycle
• Canvas objects, assets, and rendering
• Canvas inputs and state machines

3D and procedural

• Canvas 3D and procedural guide
• 3D scenes, cameras, and lights
• Procedural geometry and fields
• Particles and physics

Reference

• Node reference index
• Node categories reference
• Runtime loading and publishing
• Runtime API reference
• Debugging and preflight
• Debug API reference
• Validation errors and warning codes
• Faster Motion production checklist
• Faster Motion recipes overview