import-export

Named export conventions and barrel file usage rules for the Trezor Suite codebase. Use when writing imports, exports, or deciding on module structure.

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Repository: trezor/trezor-suite
Last source activity: March 26, 2026 at 10:03
Detected SKILL.md language: English
Stars: 1,032
Forks: 376

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name	import-export
description	Named export conventions and barrel file usage rules for the Trezor Suite codebase. Use when writing imports, exports, or deciding on module structure.

Import/Export

Use named export only

Consistency. With named exports you can always be sure that the exported value will not be renamed at one point. It's much easier to refactor with named exports because you can mass-replace and be more confident that it covered everything. Same goes for searching for a value.
Tree-shaking. With named exports, Webpack can recognize which exported values are unused and eliminate them. If you want to import all exports from a file and not use default exports, – use:
```
import * as colorUtils from './utils.js';
```

Barrel (index.ts) files

Use them in packages to define public interface.

Do not use them inside a module to export from directory. If you feel it shall be separated, create a new package. They can introduce accidental circular dependencies and may hurt tree-shaking.

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defensive-programming

Type safety practices including exhaustive checks, explicit return types, Result-based error handling, and non-mutating array methods. Use when writing TypeScript logic that handles multiple cases or error conditions, or when sorting, reversing, splicing, or replacing an element (indexed assignment) in an array you did not create.

2026-08-24

performance-complexity

Collection-handling performance for Trezor Suite — indexing before iteration, O(1) sort comparators, and reduce accumulators that don't allocate. Use when writing a loop, sort or reduce over accounts, tokens, transactions or UTXOs.

2026-08-24

performance-dom

Browser rendering performance for Trezor Suite — forced synchronous layout from geometry reads, observer APIs instead of measuring an element, and transitioning only compositor properties. Use when measuring, scrolling or animating a DOM element, or when writing a CSS transition. Web and desktop only.

2026-08-24

View all from this repository

name	import-export
description	Named export conventions and barrel file usage rules for the Trezor Suite codebase. Use when writing imports, exports, or deciding on module structure.

Import/Export

Use named export only

Consistency. With named exports you can always be sure that the exported value will not be renamed at one point. It's much easier to refactor with named exports because you can mass-replace and be more confident that it covered everything. Same goes for searching for a value.
Tree-shaking. With named exports, Webpack can recognize which exported values are unused and eliminate them. If you want to import all exports from a file and not use default exports, – use:
```
import * as colorUtils from './utils.js';
```

Barrel (index.ts) files

Use them in packages to define public interface.

Do not use them inside a module to export from directory. If you feel it shall be separated, create a new package. They can introduce accidental circular dependencies and may hurt tree-shaking.

import-export

Source facts

Install options

Review the source files

Import/Export

Use named export only

Barrel (index.ts) files

More from this repository

More from this repository

Import/Export

Use named export only

Barrel (index.ts) files