TypeScript tutorialLesson 38Free preview

TS Migration

This lesson is part of TypeScript · All levels

Summary

The migration from JavaScript to TypeScript should be done in stages, starting with a new module or library core. The allowJs option allows the mixing of .js and .ts files during the transition process. After the type of bearing, the refactor becomes much safer as the compiler captures the change.

Key points

Migration is done in stages, not at once
AllowJs allows a mix of .js and .ts
@types or.d.ts linking old library

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