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.

Software Engineer

tree-IT GmbH
Bad Neustadt an der Saale, Germany

Intermediate
Senior

Matching moments

How to convince your team to adopt TypeScript
30:50 MIN

How to convince your team to adopt TypeScript

4 Steps from JavaScript to TypeScript

Evaluating the pros and cons of TypeScript adoption
04:14 MIN

Evaluating the pros and cons of TypeScript adoption

4 Steps from JavaScript to TypeScript

Why TypeScript is essential for building large applications
22:24 MIN

Why TypeScript is essential for building large applications

Building a large, complex product from the ground up with typescript & Atomic Design:lessons learned

Leverage JS Doc for type safety in JavaScript
20:02 MIN

Leverage JS Doc for type safety in JavaScript

4 Steps from JavaScript to TypeScript

The benefits of using TypeScript with Svelte
00:41 MIN

The benefits of using TypeScript with Svelte

Svelte ♥ TypeScript and so will you

Evaluating the strengths and limitations of TypeScript
38:46 MIN

Evaluating the strengths and limitations of TypeScript

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

Recap of the four-step JavaScript to TypeScript migration
28:31 MIN

Recap of the four-step JavaScript to TypeScript migration

4 Steps from JavaScript to TypeScript

Strategies for migrating large codebases to TypeScript
32:12 MIN

Strategies for migrating large codebases to TypeScript

WeAreDevelopers LIVE - Whats Nuxt and Next for app development, 20 years AJAX and more

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

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

Lies we Tell Ourselves As Developers31:13

Lies we Tell Ourselves As Developers

Stefan Baumgartner

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

Svelte ♥ TypeScript and so will you28:20

Svelte ♥ TypeScript and so will you

Ivan Hofer

Related Articles

View all articles
DC
Daniel Cranney
Exploring TypeScript: Benefits for Large-Scale JavaScript Projects
JavaScript is the backbone of web development, powering everything from small websites to large-scale enterprise applications. However, as projects grow in complexity, maintaining JavaScript code can become increasingly difficult. This is where TypeS...
Exploring TypeScript: Benefits for Large-Scale JavaScript Projects
BR
Benjamin Ruschin
The HTML Elements That You’re Probably Over-Engineering
As frameworks have become more and more commonplace in the world of web development, so too has the over-engineering of features made possible by our humble old friend, HTML. The mental models that come with using state management in React, Vue and o...
The HTML Elements That You’re Probably Over-Engineering
DC
Daniel Cranney
Dev Digest 195: End of Likes, JavaScript’s a Zoo, and Messing with Bots!
Inside last week’s Dev Digest 195 . 👎 No more external likes 🤗 Needy programs 📉 The worst selling Microsoft product 🟨 JavaScript engines zoo 🍞 No more toasts! 🤖 Messing with bots 👔 Beware of fake job interviews 🗞️ Join over 150,000 developers alread...
Dev Digest 195: End of Likes, JavaScript’s a Zoo, and Messing with Bots!

From learning to earning

Jobs that call for the skills explored in this talk.

TypeScript AWS Developer

TypeScript AWS Developer

TechShack
Charing Cross, United Kingdom

£156-182K
Senior
Terraform
TypeScript
Microservices
Amazon Web Services (AWS)
Typescript Developer

Typescript Developer

Dabster
Charing Cross, United Kingdom

Java
Docker
JavaScript
TypeScript
Microservices
+1