Document Link

https://flutter.dev/go/deprecate-html-renderer

What problem are you solving?

The HTML renderer is complex, underperforming, and limited in graphical expressivity compared to WebGL-based CanvasKit and Skwasm renderers. Flutter Web’s WebGL-based renderers matured to a point where the value provided by the HTML renderer no longer outweighs the maintenance costs, the developer-facing complexity (having to choose between multiple renderers and work around their limitations), and loss of focus on the WebGL renderers.

See the document for an expanded problem statement.

Tasks

The following tasks need to be completed before we begin the deprecation process:

• [web] replace current wasm image codecs with on-demand off-thread bundle #113713
  • [canvaskit] Determine if image is animated by reading its header and use Skia to decode in that case #151911
• optimized app loading (landed with the new bootstrap API)
• [web] sink pictures/platform views to the lowest available overlay #149863
• [web] Find an ergonomic solution for CORS images for CanvasKit and Skwasm #149843
• web build/run/test: log to terminal when user picks HTML renderer – that it's going away #154878
• web + html renderer + asserts enabled: log that HTML renderer is deprecated #154879