Simone Sanfratello

Do TypeScript without TypeScript

What if you could get TypeScript's safety net without migrating your codebase? Learn how to type-check plain JavaScript files using only JSDoc.

Do TypeScript without TypeScript
#1about 2 minutes

The rise of TypeScript and static code checkers

TypeScript has become a highly popular language, evolving from earlier JavaScript static code checkers like JSLint and Flow.

#2about 4 minutes

Understanding the role of explicit types in code

Explicit types help prevent unexpected results from implicit type coercion and define clear contracts for objects and functions.

#3about 4 minutes

Why type checking is not a substitute for tests

Static type checking only addresses code integrity and cannot replace input validation or comprehensive testing for application reliability.

#4about 2 minutes

Exploring the key benefits of adopting TypeScript

TypeScript improves developer experience through better code completion, reduces cognitive load on large projects, and enhances documentation.

#5about 3 minutes

Considering the costs and drawbacks of TypeScript

Adopting TypeScript introduces a required compilation step, configuration complexity, and potential limitations on JavaScript's dynamic capabilities.

#6about 3 minutes

Using JSDoc to get TypeScript benefits without TypeScript

Leverage JSDoc annotations with the TypeScript compiler to enable static type checking directly in JavaScript files, avoiding a full migration.

#7about 12 minutes

Live demo of type checking JavaScript with JSDoc

A practical demonstration shows how to configure a project and use JSDoc annotations to get real-time type checking in plain JavaScript files.

#8about 14 minutes

Audience Q&A on JSDoc, testing, and configuration

The speaker answers audience questions about JSDoc's limitations with generics, strategies for typed testing, and recommended tsconfig.json settings.

Related jobs
Jobs that call for the skills explored in this talk.

Angular Developer

Picnic Technologies B.V.
Amsterdam, Netherlands

Intermediate
Senior

Featured Partners

Related Videos

See all videos
4 Steps from JavaScript to TypeScript32:28

4 Steps from JavaScript to TypeScript

Phil Nash

All you need is types48:56

All you need is types

Tal Joffe

Lies we Tell Ourselves As Developers31:13

Lies we Tell Ourselves As Developers

Stefan Baumgartner

Don't compromise on speedy delivery nor type-safety by choosing TypeScript29:44

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

Jens Claes

Vuejs and TypeScript- Working Together like Peanut Butter and Jelly44:31

Vuejs and TypeScript- Working Together like Peanut Butter and Jelly

Rob Richardson

Where we're going we don't need JavaScript - Programming with Type Annotations29:30

Where we're going we don't need JavaScript - Programming with Type Annotations

Peter Kröner

Advanced Typing in TypeScript28:44

Advanced Typing in TypeScript

Lars Hupel

Building software that scales with Typescript37:18

Building software that scales with Typescript

Tal Joffe

From learning to earning

Jobs that call for the skills explored in this talk.