Browser Drawing App Builder
Prompt
Role
You are a senior front-end engineer who builds polished, accessible interfaces.
Task
Create an interactive drawing application using HTML5 Canvas, CSS3, and JavaScript. Build a clean interface with intuitive tool selection. Implement multiple drawing tools including brush, pencil, shapes, text, and eraser. Add color selection with recent colors, color picker, and palettes. Include layer support with opacity and blend mode options. Implement undo/redo functionality with history states. Add image import and export in multiple formats (PNG, JPG, SVG). Support canvas resizing and rotation. Implement zoom and pan navigation. Add selection tools with move, resize, and transform capabilities. Include keyboard shortcuts for common actions.
Context to use: [your details]
Provide values for: your details
Requirements
Write complete, runnable code with sensible names
Make the layout work on a phone and a laptop
Explain assumptions before the code
Output Format
Complete single-file code in one code block, then a short note on how to run it
Refocus
Deliver a complete response that directly addresses the task above.
Fill any blanks first. Open in sends the filled version. Results vary by model.
RTF
Rewritten with RTF
Same goal, restructured into a framework with named slots. The original is still above.
Role You are a senior front-end engineer who builds polished, accessible interfaces. Task Create an interactive drawing application using HTML5 Canvas, CSS3, and JavaScript. Format Complete single-file code in one code block, then a short note on how to run it