Re-exporting modules in Typescript - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does re-exporting modules mean in TypeScript?

Re-exporting modules means exporting something from one module again through another module, so you can gather exports in one place for easier imports.

beginner

How do you re-export all exports from another module?

Use export * from './module'; to re-export everything that the other module exports.

beginner

How can you re-export a specific export from another module?

Use export { name } from './module'; to re-export only the named export.

intermediate

Why use re-exporting in a project?

It helps organize code by creating a single entry point to import many things, making imports cleaner and easier to manage.

intermediate

Can you rename exports while re-exporting? How?

Yes, you can rename exports using export { originalName as newName } from './module';.

Which syntax re-exports all exports from a module named 'utils'?

A export * from './utils';

B import * from './utils';

C export { * } from './utils';

D import { * } from './utils';

The correct syntax to re-export all exports is export * from './utils';.

How do you re-export only the 'calculate' function from 'math.ts'?

A export * from './math';

B import { calculate } from './math';

C export { calculate } from './math';

D export calculate from './math';

Use export { calculate } from './math'; to re-export only the 'calculate' function.

What is the benefit of re-exporting modules?

A To rename files automatically

B To make code run faster

C To avoid using imports

D To create a single place to import many exports

Re-exporting helps organize imports by gathering exports in one place.

Can you rename an export while re-exporting it?

A Yes, using 'as' keyword

B No, renaming is not allowed

C Only if you import first

D Only for default exports

You can rename exports using export { originalName as newName } from './module';.

Which statement is true about re-exporting?

A It only works with default exports

B It allows combining exports from multiple modules into one

C It disables tree shaking

D It duplicates code in the output

Re-exporting lets you combine exports from different modules into a single module.

Explain how re-exporting modules works and why it is useful in TypeScript projects.

Think about how you can collect exports from many files into one place.

Describe the difference between re-exporting all exports and re-exporting specific exports from a module.

Consider when you want everything vs. only some parts.