Declaration Files
Declaration files (.d.ts) provide type information for JavaScript libraries, enabling TypeScript support.
Declaration Files
Output
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DefinitelyTyped: Community repository of type
definitions at
@types/*Best Practice: Use
@types
packages for popular libraries. Create custom .d.ts for internal JS code.Summary
- Declaration files end in .d.ts
- Provide types for JavaScript
- Use
declarekeyword - DefinitelyTyped has thousands of types
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