Michael Hladky & Stefan Baumgartner

The Art and Craft of Type Development

Stop guessing object paths. Use recursive types and template literals to get full auto-completion and compile-time safety for any nested property.

The Art and Craft of Type Development
#1about 6 minutes

The challenge of typing deeply nested object properties

Manually creating function overloads for each level of object nesting is not a scalable or dynamic solution for property selection.

#2about 9 minutes

Setting up a playground for advanced type development

Isolate type development by using the TypeScript playground, a sample data object, and a declared function to focus solely on type signatures.

#3about 13 minutes

Recursively generating a union type for nested keys

Build a recursive helper type using string literals and conditional types to generate a union of all possible dot-notation paths for a nested object.

#4about 8 minutes

Inferring the return type from a string path

Use a recursive conditional type with the `infer` keyword to parse a dot-notation string and correctly determine the type of the selected nested property.

#5about 6 minutes

Recapping the workflow and current TypeScript limitations

The development process involves isolating the problem, using helper types, and understanding current limitations like variadic tuple types for dynamic argument lists.

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

Matching moments

Understanding the power and popularity of TypeScript
02:11 MIN

Understanding the power and popularity of TypeScript

End-to-End TypeScript: Completing the Modern Development Stack

Understanding TypeScript's origins and role in scalability
02:37 MIN

Understanding TypeScript's origins and role in scalability

All you need is types

Evaluating the strengths and limitations of TypeScript
04:07 MIN

Evaluating the strengths and limitations of TypeScript

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

Advanced typing for complex custom operators
06:19 MIN

Advanced typing for complex custom operators

How to Create New RxJS Operators

Q&A on performance, interfaces, and advanced learning
04:23 MIN

Q&A on performance, interfaces, and advanced learning

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

How to convince your team to adopt TypeScript
01:38 MIN

How to convince your team to adopt TypeScript

4 Steps from JavaScript to TypeScript

Minimizing boilerplate code with advanced TypeScript features
07:58 MIN

Minimizing boilerplate code with advanced TypeScript features

All you need is types

Exploring the key benefits of adopting TypeScript
01:56 MIN

Exploring the key benefits of adopting TypeScript

Do TypeScript without TypeScript

Featured Partners

Related Videos

See all videos
Lies we Tell Ourselves As Developers31:13

Lies we Tell Ourselves As Developers

Stefan Baumgartner

Advanced Typing in TypeScript28:44

Advanced Typing in TypeScript

Lars Hupel

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

Vuejs and TypeScript- Working Together like Peanut Butter and Jelly

Rob Richardson

Hello generics, goodbye boilerplate!42:16

Hello generics, goodbye boilerplate!

Miroslav Jonaš

Typescript, React and Atomic Design - a match made in heaven40:05

Typescript, React and Atomic Design - a match made in heaven

Nathalia Rus

All you need is types48:56

All you need is types

Tal Joffe

Typed Security: Preventing Vulnerabilities By Design58:19

Typed Security: Preventing Vulnerabilities By Design

Michael Koppmann

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

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
S
SciChart
The Fastest JavaScript Charts - Built for React and Beyond
For most developers, browser charting works fine — until it doesn’t. Once you push beyond tens of thousands of points, add live streaming, or need advanced interactions, the story changes: frame drops, frozen dashboards, memory issues. That’s where S...
The Fastest JavaScript Charts - Built for React and Beyond

From learning to earning

Jobs that call for the skills explored in this talk.