Question 1

How to use ng-morph to update Angular component selectors?

Accepted Answer

Use ng-morph's Angular utilities like getComponents to find components and editSelectors to modify them. Set up the active project with file patterns, apply changes, and save—refer to the documentation for specific examples on selector transformations.

Question 2

ng-morph vs writing custom codemods with jscodeshift?

Accepted Answer

ng-morph is more Angular-focused and provides a higher-level API built on ts-morph, making it safer and easier for Angular projects with built-in support for Angular entities. jscodeshift is more general-purpose but requires deeper AST knowledge and lacks native Angular optimizations.

Question 3

Can ng-morph handle JSON file modifications in migrations?

Accepted Answer

Yes, ng-morph supports project-wide refactoring across both TypeScript and JSON files. In the setup, you can include '**/*.json' in file patterns to apply mutations, enabling updates to configuration files or other JSON data.

Question 4

Is ng-morph suitable for small codebases or only large migrations?

Accepted Answer

While designed for large-scale refactoring, ng-morph can be used for small codebases, but the initial setup and abstraction might be overkill for trivial, one-off changes. It shines when automating repetitive tasks across multiple files.

Question 5

How to test ng-morph schematics without affecting real files?

Accepted Answer

ng-morph allows working with a virtual project tree for testing. Use createProject with a virtual file system to run schematics in isolation, verify changes, and only save to disk when ready, ensuring safe experimentation.

Question 6

What are the performance implications of ng-morph on large projects?

Accepted Answer

ng-morph processes files based on glob patterns and uses ts-morph for efficient AST manipulation, but performance can degrade with very large codebases. It's advisable to test migrations incrementally and optimize file patterns to avoid unnecessary processing.

ng-morph

What is ng-morph?

Overview

Use Cases

Best For

Related Projects

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions