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World Congress 2022 • Jun 15, 2022

Advanced Typing in TypeScript

Lars Hupel

Can you map JavaScript's unpredictable patterns into strongly typed systems? Learn to build a Pandas-like dataframe in TypeScript that catches complex schema mismatches strictly at compile time.

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#1 about 5 min

Core design principles and features of TypeScript

An overview of why TypeScript goes beyond simple data annotations to support dynamic behavior through structural typing and inference.

#2 about 6 min

Typing DOM events with advanced pattern mapping

How TypeScript handles complex overload scenarios and dynamically maps event types based on predefined string literals.

#3 about 5 min

Evaluating Python Pandas for data type safety

An exploration of common data science workflows and the lack of shape validation in traditional dataset libraries.

#4 about 5 min

Structuring a strongly typed table interface

Designing a reliable table schema model by leveraging generic type parameters and anonymous record types.

#5 about 3 min

Implementing the table and series type interfaces

Mapping strictly validated record keys to series elements to ensure that column operations conform to exact types.

#6 about 5 min

Validating typed dataframe operations in a node environment

Executing type-safe column selections, computations, and removals on tabular data to verify compiler inference rules.

#7 about 3 min

Handling partial objects and dynamic column type inference

Clarifying approaches to initialize all properties of a partial object and confirming that dynamic column additions resolve automatically.

Matching moments

2:00 min

The origins and early problems solved by TypeScript

Dani Coll Dani Coll · WWC Europe 2026

2:28 min

Exploring the benefits of type safety and TypeScript migration

Chris Heilmann +2 · LIVE

3:08 min

Introduction to basic TypeScript capabilities and type annotations

Jens Claes · WWC 2023

1:20 min

Core takeaways for end-to-end TypeScript development

Marco Podien Marco Podien · WWC 2025

2:51 min

Deciding when to adopt or avoid TypeScript

Rob Richardson · LIVE

2:17 min

TypeScript ecosystem integrations and AI code completion

Matteo Collina Matteo Collina · JS Congress

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