Babel — Compiler playground

Editors & ToolsSee it livebabeljs.io

Compiler configuration remains in a dark left sidebar while blank source and output panes occupy the main workspace.

Babel — Compiler playground — captured interface — Viewport capture · opening screen

Source capture · 2026-09-08Open full image ↗

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Why this pattern works

Compiler configuration remains in a dark left sidebar while blank source and output panes occupy the main workspace.

Design notes

Surface: Babel — Compiler playground
Navigation: Configuration sidebar beside source and output editors.
Layout: Configuration sidebar beside source and output editors.
Density: Compact supporting controls preserve space for the primary content.
Color: Black, white and muted yellow
Type: Small utility labels with monospaced text where code or structured data is visible.
Pattern: Compiler configuration remains in a dark left sidebar while blank source and output panes occupy the main workspace.
States: Public opening screen as captured; subsequent actions and authenticated states were not tested.
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: Babel — Compiler playground
Source: https://babeljs.io/repl#?config_lz=N4IgZglgNgpgdgQwLYxALhAJxgBygOgCsBnADxABoQdtiYAXY9AbWZHgDdLR6FMBzBkwwATGGAQBXKI0ogkAexHSYwiVDoBfALoU22BAGN63LJLj0IKdCCn0FSBJcMgdekMV6CAtACZTYoYKmE7BxABqMJjEEApwNr4ADL4AzN4AjOlyOBA4MFAQcDAACpgKOArECFA2ABZGANau2roeCpKYhjAAKgCeeTaKyrCuQA&lineWrap=true&version=8.0.4
Swipefile reference: https://swipefile.design/ref/expand-babel-compiler-playground/
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: Babel — Compiler playground
- nav: Configuration sidebar beside source and output editors.
- layout: Configuration sidebar beside source and output editors.
- density: Compact supporting controls preserve space for the primary content.
- color: Black, white and muted yellow
- typography: Small utility labels with monospaced text where code or structured data is visible.
- pattern: Compiler configuration remains in a dark left sidebar while blank source and output panes occupy the main workspace.
- states: Public opening screen as captured; subsequent actions and authenticated states were not tested.
- 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: Compiler configuration remains in a dark left sidebar while blank source and output panes occupy the main workspace.

## 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: Compiler configuration remains in a dark left sidebar while blank source and output panes occupy the main workspace.

Babel — Compiler playground

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