exportUniqueNames

Reports duplicate export names in a module.

✅ This rule is included in the ts javascript presets.

Having multiple exports with the same name creates ambiguity about which value is exported. This can lead to confusion and runtime errors when consuming the module.

Examples

❌ Incorrect

export const value = 1;
export { value };

const a = 1;
const b = 2;
export { a };
export { b as a };

✅ Correct

export const value = 1;

const a = 1;
const b = 2;
export { a, b };

Options

This rule is not configurable.

When Not To Use It

This rule catches actual errors, so you should generally keep it enabled. TypeScript itself will catch many of these cases, but this rule provides earlier feedback.

Further Reading

• MDN: export

Equivalents in Other Linters

• ESLint: import/exports
• Oxlint: import/exports