ts-morph-refactor

TypeScript interface propagation applies AST-based refactoring to update all implementations when an interface or class changes. By analyzing the syntax tree, it automatically modifies implementing classes to match the updated contract.

Before applying TypeScript refactoring changes, you can use the dry-run preview feature. This shows exactly what modifications the AST manipulation will make across your files, allowing you to verify updates before committing.

After completing an AST-based TypeScript refactor, you should run a type-check. This validates that the semantic changes, such as moved declarations or propagated interfaces, did not introduce type errors across the codebase.

AST refactoring can add methods to TypeScript class implementations across your codebase. By leveraging ts-morph, it programmatically inserts methods into target classes and modifies parameter or return types consistently.