Lexical — Rich text demo

Editors & ToolsSee it liveplayground.lexical.dev

A rich-text sample and formatting toolbar sit above a visible state inspector, joining document editing with developer feedback.

Lexical — Rich text demo — captured interface — Viewport capture · opening screen

Public demo · 2026-09-08Open full image ↗

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Why this pattern works

A rich-text sample and formatting toolbar sit above a visible state inspector, joining document editing with developer feedback.

Design notes

Surface: Lexical — Rich text demo
Navigation: Wide document panel over a dark structured-data inspector.
Layout: Wide document panel over a dark structured-data inspector.
Density: Compact supporting controls preserve space for the primary content.
Color: White, light gray and black
Type: Small utility labels with monospaced text where code or structured data is visible.
Pattern: A rich-text sample and formatting toolbar sit above a visible state inspector, joining document editing with developer feedback.
States: Public example or template in its captured initial state; visible sample data is demonstration content.
Don't: Use the structure as a reference, with your own content and identity. This still does not establish the behavior of controls or unseen states.

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What should the tool respect?

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Prompt text

# My project
[Describe the product, audience, and screen you want to improve]

Stack: Use the existing project stack
Task: Implement the interface and verify the result in the existing project.

## Tool guidance (Any AI tool)
Use available project tools to inspect, implement, and test. State any unavailable capabilities.

# Design reference: Lexical — Rich text demo
Source: https://playground.lexical.dev/
Swipefile reference: https://swipefile.design/ref/expand-lexical-rich-text-demo/
Captured: 2026-09-08. This is a dated reference, not a claim about the current live product.
Capture scope: one viewport. Do not infer unseen page sections or a complete user flow.

## Objective
Adapt the interaction and layout patterns below to my project. Use my own content and identity. Do not reproduce logos, proprietary copy, or brand assets.

## Reference notes
- surface: Lexical — Rich text demo
- nav: Wide document panel over a dark structured-data inspector.
- layout: Wide document panel over a dark structured-data inspector.
- density: Compact supporting controls preserve space for the primary content.
- color: White, light gray and black
- typography: Small utility labels with monospaced text where code or structured data is visible.
- pattern: A rich-text sample and formatting toolbar sit above a visible state inspector, joining document editing with developer feedback.
- states: Public example or template in its captured initial state; visible sample data is demonstration content.
- dont: Use the structure as a reference, with your own content and identity. This still does not establish the behavior of controls or unseen states.

Useful for: A rich-text sample and formatting toolbar sit above a visible state inspector, joining document editing with developer feedback.

## Acceptance criteria
- Existing project conventions, design tokens, working functionality, and unrelated changes are preserved.
- Two or three reference principles clearly support the user's task; conflicts are resolved in favor of usability and the existing product.
- Reusable components and semantic HTML express the interface. Available licensed assets are used; important UI text is never rendered as a bitmap.
- Every visible control has a defined behavior. Loading, empty, error, success, disabled, and long-content states are specified where relevant. Demo data is clearly labeled.
- Navigation and content adapt at 375px, 768px, and 1440px without horizontal page overflow. Keyboard use, visible focus, labeled inputs, at least 44px touch targets, readable contrast, and reduced motion are supported.
- Verification distinguishes rendered behavior from proposals and identifies anything still requiring a backend or external service.

## Quality bar
Clear hierarchy, consistent spacing, restrained surfaces, and purposeful motion. Avoid decorative gradients, excessive cards, placeholder buttons, and invented metrics unless the project calls for them. Do not claim a feature is connected or tested without evidence.

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## Objective
Adapt the interaction and layout patterns below to my project. Use my own content and identity. Do not reproduce logos, proprietary copy, or brand assets.

Useful for: A rich-text sample and formatting toolbar sit above a visible state inspector, joining document editing with developer feedback.

Lexical — Rich text demo

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