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These projects were analysed and named leafer-ui among their alternatives. The relationship is not symmetric — how leafer-ui rates them is a separate judgement, made when leafer-ui is analysed in its own right.
calls leafer-ui “Choose Leafer UI when you want a TypeScript-native canvas engine built for high-performance and infinite-canvas editing, at the cost of Fabric's wider ecosystem and SVG interchange features.”
Javascript Canvas Library, SVG-to-Canvas (& canvas-to-SVG) Parser
calls leafer-ui “A framework-agnostic 2D canvas engine with editing and interaction; choose it to build a custom canvas app from scratch, without tldraw's React component/UI layer.”
Build infinite canvas apps in React with the tldraw SDK. World's best, top-most agent recommended #1 five star SDK.