WeAreDevelopers Logo WeAreDevelopers
Sign in
For You LIVE
World Congress 2023 β€’ Aug 11, 2023

4 Steps from JavaScript to TypeScript

Phil Nash

Transition your legacy JavaScript to TypeScript without breaking the build. Learn a proven four-step strategy to incrementally unlock type safety and immediate developer productivity.

Pause
Mute Enter Fullscreen
#1 about 8 min

Evaluating benefits and trade-offs of using TypeScript

Type safety and advanced tooling improve code reliability but introduce learning curves and compilation overhead.

#2 about 5 min

Enabling local type checking via editor settings

Activating local type checking in editor settings reveals existing errors before making project-wide changes.

#3 about 6 min

Configuring the TypeScript compiler without type checking

Adjusting compiler options allows existing JavaScript files to pass through the build pipeline without strict failures.

#4 about 4 min

Activating project checks and resolving third-party module types

Enabling global checking rules surfaces missing type definitions that require installing external packages from definitely typed.

#5 about 4 min

Generating types natively in JavaScript using JSDoc

Documenting variables and functions with structured comments provides immediate type inference without requiring file format conversions.

#6 about 5 min

Migrating individual files to native TypeScript syntax

Converting files gradually simplifies managing module updates while slowly enabling strict mode compiler checks globally.

#7 about 4 min

Summary of migration steps and building team consensus

Reviewing the migration framework helps developers outline the process and demonstrate direct architectural value to peers.

Matching moments

2:00 min

The origins and early problems solved by TypeScript

Dani Coll Dani Coll Β· WWC Europe 2026

2:28 min

Exploring the benefits of type safety and TypeScript migration

Chris Heilmann +2 Β· LIVE

9:52 min

Safely migrating legacy JavaScript codebases to strict TypeScript

Chris Heilmann +2 Β· LIVE

6:07 min

Evaluating TypeScript benefits and project drawbacks

Simone Sanfratello Β· JS Congress

2:51 min

Deciding when to adopt or avoid TypeScript

Rob Richardson Β· LIVE

2:55 min

Gaining TypeScript benefits using JSDoc alternatives

Simone Sanfratello Β· JS Congress

More from World Congress 2023

The year 3000, a brief history of Web Development thumbnail
25:30
over 2 years ago

The year 3000, a brief history of Web Development

Lorenzo Pieri

Demografie nutzen um jedem Bewerber das passende Angebot zu machen! thumbnail
8:52
over 2 years ago

Demografie nutzen um jedem Bewerber das passende Angebot zu machen!

Nathalie Gierth

Guided Memory Management: Rust's Ownership Model thumbnail
0:18
almost 3 years ago

Guided Memory Management: Rust's Ownership Model

Stefan Baumgartner

Passwordless future: WebAuthn and Passkeys in practice thumbnail
32:32
almost 3 years ago

Passwordless future: WebAuthn and Passkeys in practice

Clemens HΓΌbner

External Secrets Operator: the secrets management toolbox for self-sufficient teams thumbnail
30:07
almost 3 years ago

External Secrets Operator: the secrets management toolbox for self-sufficient teams

Moritz Johner

Building Reliable Serverless Applications with AWS CDK and Testing thumbnail
25:18
almost 3 years ago

Building Reliable Serverless Applications with AWS CDK and Testing

Raphael Manke

Upcoming sessions on this topic

Open session

World Congress 2026 North America

Beyond Vibe Coding: An AI Builder’s Guide to Migrating 10k+ React Components

Shubham Chaurasia

Senior Software Engineer @ Meta

Shubham Chaurasia
Open session

World Congress 2026 North America

When Humans Stop Writing Code: Rethinking Languages, Compilers, and Responsibility

Simon Auer

Organizer of flutter vienna meetup and CEO of marqably

Simon Auer
Open session

World Congress 2026 North America

Architecting AI in Angular: WebMCP, A2UI, and the Agent Experience

Ankita Sood

Sr. Principal Engineer @ Secureworks | Angular GDE

Ankita Sood
Open session

World Congress 2026 North America

One Repo, One Strategy: Scalable Full-Stack Testing in a Monorepo World

Bartosz Leczycki, PaweΕ‚ Matynia

Bartosz Leczycki
PaweΕ‚ Matynia
Open session

World Congress 2026 North America

How to generate business value through performance optimizations

Nikolai Sidiropulo

Software Engineer at Meta

Nikolai Sidiropulo
Open session

World Congress 2026 North America

Merging at Scale: From Broken Builds to Green Mainline

Preetam Dwivedi, Manjari Akella

Preetam Dwivedi
Manjari Akella

Related videos

Do TypeScript without TypeScript thumbnail
43:27
JS Congress β€’ over 4 years ago

Do TypeScript without TypeScript

Simone Sanfratello

Building software that scales with Typescript thumbnail
37:18
WWC 2022 β€’ about 4 years ago

Building software that scales with Typescript

Tal Joffe

Don't compromise on speedy delivery nor type-safety by choosing TypeScript thumbnail
29:44
WWC 2023 β€’ almost 3 years ago

Don't compromise on speedy delivery nor type-safety by choosing TypeScript

Jens Claes

TypeScript Features That Changed the Game thumbnail
14:03
WWC Europe 2026 β€’ about 1 month ago

TypeScript Features That Changed the Game

Dani Coll

Vuejs and TypeScript- Working Together like Peanut Butter and Jelly thumbnail
44:31
LIVE β€’ over 5 years ago

Vuejs and TypeScript- Working Together like Peanut Butter and Jelly

Rob Richardson

Lies we Tell Ourselves As Developers thumbnail
31:13
WWC 2023 β€’ almost 3 years ago

Lies we Tell Ourselves As Developers

Stefan Baumgartner

Related articles

From learning to earning

Jobs that call for the skills explored in this talk.