#typescript

Today's Talk focuses on React's best types and JSX. It covers the types of JSX and React components, including React.fc and React.reactnode. The discussion also explores JSX intrinsic elements and react.component props, highlighting their differences and use cases. The Talk concludes with insights on using React.componentType and passing components, as well as utilizing the react.element ref type for external libraries like React-Select.

Daniel Rowe discusses building a TypeScript-first framework at TypeScript Congress and shares his involvement in various projects. Nuxt is a progressive framework built on Vue.js, aiming to reduce friction and distraction for developers. It leverages TypeScript for inference and aims to be the source of truth for projects. Nuxt provides type safety and extensibility through integration with TypeScript. Migrating to TypeScript offers long-term maintenance benefits and can uncover hidden bugs. Nuxt focuses on improving existing tools and finds inspiration in frameworks like TRPC.

React and TypeScript have a strong relationship, with TypeScript offering benefits like better type checking and contract enforcement. Failing early and failing hard is important in software development to catch errors and debug effectively. TypeScript provides early detection of errors and ensures data accuracy in components and hooks. It offers superior type safety but can become complex as the codebase grows. Using union types in props can resolve errors and address dependencies. Dynamic communication and type contracts can be achieved through generics. Understanding React's built-in types and hooks like useState and useRef is crucial for leveraging their functionality.

This Talk provides an overview of an open-source guitar tuner project, covering topics such as pitch detection, web APIs for microphone access, implementation with React and XGS, and data visualization. It explores various pitch detection algorithms, including zero crossing, fast Fourier transform, and autocorrelation. The project utilizes the MediaStream API and Audio API to access user media. The implementation is done with React and Next.js, and includes a utility library for performing pitch estimation and detection. The Talk also discusses future improvements for the project, such as noise cancellation and chord detection.

This Talk explores the concept of types and their significance in software development, particularly in relation to TypeScript. It discusses the limitations and advantages of TypeScript compared to other tools like Flow and Ezno. The Talk emphasizes the role of types in bridging system boundaries and improving code quality. It also highlights the importance of type-checked linting and the future of ESLint. Additionally, the Talk mentions the benefits of faster and easier linting with projects like Biome and OXC, and recommends books for further learning.

JSR is a new JavaScript registry that supports TypeScript and offers additional features like GitHub Action integration, provenance attestations, and documentation generation. It provides a simple website with package search, documentation, and a gamified score. The process of publishing a new package in JSR involves creating a JSR.json file with package details and exports, using MPX JSR publish to publish the package, and approving authorization in the browser. However, documentation for the package is not automatically generated and needs to be manually added.

This talk discusses how TypeScript definitions are automatically generated for CloudFlare workers using runtime type information. The encoding and transformation of type information is explained, with runtime API types being encoded in C++ and further processed in TypeScript. The process of improving type definitions and achieving compatibility is also covered, including fixing problems with iterators and using human input to improve developer ergonomics. The talk concludes with a plan to build Types as a Service, a Cloudflare worker that dynamically generates NPM packages containing TypeScript definition files.

This Talk is about implementing a limited subset of the type equivalent of React, specifically its JSX engine, in the TypeScript type system with no runtime code. The speaker demonstrates how to use TypeScript features like constrained types and template literal strings to infer and render JSX elements in the type system. They also show how to render headings and children using a utility called 'render component'. The Talk concludes with additional resources for learning TypeScript and related topics.

ASTs, or abstract syntax trees, are used by popular tools like Babel, TypeScript, ESlint, and Prettier to improve the developer experience. They have various use cases including compiling and code analysis. Editor tooling and writing tools can be enhanced using ASTs, with examples including formatting with Prettier, type annotations in JetBrains editors, and code mods for framework upgrades. Ts-morph is a useful tool for code transformations, while Tree Sitter is a portable tool that supports many languages and can be used to build IDEs or text editors in the browser.

This Talk explores the evolution of CSS and the development of style systems in software engineering. It discusses the limitations of CSS and the need for frameworks, pre-processors, and JavaScript to enhance styling capabilities. The Talk highlights different approaches to CSS styling, including libraries like Tailwind and Chakra UI. It also introduces innovative style systems like Vanilla Extract and Rainbow Sprinkles, which offer optimized CSS classes and type safety. The speaker emphasizes the importance of design systems and encourages developers to explore and consider the strengths and weaknesses of different style systems.

Today's Talk introduces Vanilla Extract CSS, a type-safe styling method for React applications. It combines the benefits of scoped styling, zero runtime overhead, and a great developer experience. Vanilla Extract generates a static CSS file at build time, resulting in better performance. It is framework agnostic and offers a powerful toolkit, including Sprinkles for utility classes and CSS utils for calculations. With type safety and the ability to define themes and variants, Vanilla Extract makes it easy to create efficient, scalable, and maintainable design system component packages.

Hello, I'm Lucas, a software engineer at Klarna in Sweden. I will be sharing my best tips and tricks with TypeScript. One useful tool is tsconfig-basis, which eliminates the need for copying and pasting the same tsconfig file. Rendered types in TypeScript are powerful for handling different types of strings, and type guards and assertion functions make them even more useful. Enums in TypeScript can be number, string, or const, each with its own advantages and limitations. Lastly, there are new features in PS 5.2 like 'using' for resource disposal and 'unknown' for data protection, as well as a case conversion utility type for interfaces.

This Talk discusses module system complexities and terminology, TypeScript and Node disagreements, and fixing TypeScript errors with the Helmet package. It also explores module resolution and type disagreements, challenges with TypeScript and Node support, and the need for improvements in popular packages.

The Talk discusses the potential of higher kind of types (HKTs) for library semantics, enabling better inference and type-level operations. It explains how HKTs can be created in TypeScript by exploiting function types as a function of object attributes. This allows for the creation of composable functional utilities with intelligent type inference and a chaining interface that computes type-level results. Overall, the Talk highlights the benefits and possibilities of using HKTs in software development.

The speaker discusses the benefits of replacing shell scripts with TypeScript, highlighting the limitations of shell scripts and the advantages of TypeScript such as cross-platform compatibility and better tooling. Deno is presented as the ideal platform for single file scripting, with its built-in support for TypeScript, automatic dependency installation, and sandboxing. The dax library is mentioned as a useful tool for scripting, providing a cross-platform shell and other APIs. Overall, the Talk emphasizes the power and flexibility of using TypeScript and Deno for scripting purposes.

Today's Talk explores the world of TypeScript ecosystem tooling, discussing essential tools for project setup, including package managers and project scaffolding. It also covers code analysis, testing, and deployment in TypeScript, as well as best practices for maintaining high-quality code. The Talk emphasizes the importance of intelligent code editors, code formatters, and linters in ensuring code quality. It also highlights the significance of codebase maintainability and following TypeScript best practices for efficient and scalable code.

This Talk discusses TypeScript's migration to modules, the challenges faced, and the automation used for the migration. The TS Morph library and git are used for code transformation and managing changes. The final step involves converting TS dotted names to named imports. The migration to ESBuild brings benefits like faster development loop and improved import organization in TypeScript.

Today's Talk discusses enhancing static code analysis using TypeScript language server and abstract syntax tree (AST). TypeScript can help with static analysis by providing types based on function signatures. By integrating TSMorph into a Babel plugin, we can check types for specific nodes in the abstract syntax tree. Enhancements to static analysis include checking console.log arguments and removing unnecessary expressions. TypeScript's type information can be used to compile CSS and extract it into a separate stylesheet, enabling better compilation and build time performance.

Today's Talk discusses running TypeScript in WebAssembly on the cloud using Fermion's WebAssembly runtime. Fermion provides a serverless environment called Spin that allows for easy serverless application development in multiple languages. The process of creating a TypeScript serverless app with Spin involves installing Spin, creating a new app using the HTTP TS template, and testing it on localhost. To deploy the app, the 'spin deploy' command is used, and Fermi on cloud handles routing and makes the app accessible through a public URL.

This talk explores the challenges and benefits of generating types for APIs. The speaker discusses the need for a better client experience and the popularity of generating clients. They also explain the use of OpenAPI for generating REST API clients and the use of Cold Block Writer for code generation. The talk covers the process of defining types for parameters and responses, generating the client and request, and using the generated client. The speaker also touches on validation in production and the initial challenges with TypeScript.

Today, I'm going to be talking about how type generation helped reduce bugs and improve our developer experience at Rollbar. The Monolith tech stack is built primarily on Python Pyramid, a web framework that's similar to Django, Ruby on Rails, or Express. To address debugging, performance, and code navigation challenges, we migrated to a tech stack that includes TypeScript, Next.js, GraphQL, and React Query. Codegen is used to generate TypeScript code on both the server and client side, enhancing debugging, performance, and code navigation.

Hello, welcome to Let's Make an Inference Algorithm. Today, I'll give you a high-level overview of how TypeScript's generic inference process works. We'll explore different possibilities like 'any,' 'unknown,' or 'number.' The algorithm for inferring type arguments collects candidates and picks the first one, ensuring the best correct answer. The concept of the best common supertype is used to determine the best candidate. Context sensitivity is addressed in the algorithm, allowing for optimal behavior.

The Talk discusses the limitations of TypeScript and the lies we tell ourselves about its type safety. It explores examples of unsafe operations and bending the type system using keywords like type assertion and function is dice. The Talk also covers catching syntax errors, type mismatches, and the complexity of conditional types and generics. It emphasizes the importance of understanding TypeScript's limitations and making well-informed decisions as software engineers.

Leveraging TypeScript and Atomic Design can solve code structure conundrums and achieve readability, efficiency, and flexibility. TypeScript offers benefits like intelligent refactoring, improved on-boarding, and fewer bugs. Typescript makes you think differently and opens doors for what you can do. Real-world challenges and considerations can be exacerbated when using TypeScript with atomic design. Avoid over-engineering and code depth, and stay close to the product to maintain codebase alignment.

Today's Talk explores TypeScript integration and refactoring, code action handling, the TypeScript server and refactoring process, bug reporting, and the TypeScript protocol and LSP. The Talk discusses how TypeScript is integrated into editors, the role of code action providers, and the communication between the client and server. It also highlights the two-stage process of code actions and the importance of bug reporting. Additionally, it mentions the TypeScript protocol and how it allows for language-specific extensions. LSP is mentioned as a powerful extensibility solution used by various languages.

This talk discusses the performance issues in TypeScript builds and introduces a new feature called isolated declarations. By running the compiler in parallel and using isolated modules, significant performance gains can be achieved. Isolated declarations improve build speed, compatibility with other tools, and require developers to write types in code. This feature has the potential to further increase performance and may be available in TypeScript soon.

Key-value databases are optimized for high availability and partition tolerance, making them ideal for storing non-relational data structures. They prioritize speed and high availability over consistency, making them suitable for simple data models or one-to-one mappings. However, they have limited query capabilities compared to relational databases. Some available options for key-value databases include DynamoDB, CloudFlare Worker KV, Redis, and FoundationDB. Using key-value databases in TypeScript requires addressing challenges such as serialization, deserialization, secondary indexes, relationships, and validation. The Talk includes a demonstration of an application that showcases the use of secondary indexes and the implementation of a key-value database in Deno or Redis.

This Talk discusses the concept of runtime validation in TypeScript and how it bridges the gap between TypeScript's expressiveness and runtime capabilities. The speaker explains the evolution of top-down parsing and the shift-reduced parser that made runtime validation possible. The benefits of runtime validation in terms of flexibility, scalability, and efficiency are highlighted. The integration of validation and the type system is emphasized, along with the enhanced validation capabilities and new features offered by the Archetype framework.

Hi, everyone. Today, I'll be showing you some of the features that modern frameworks implement or frameworks that leverage Typescript implement to improve the developer and user experience. I'll cover some of the features that Expo with Expo Router and Next.js with the AppRouter implements. Let's talk about setting up TypeScript in both Expo and Next.js. Both frameworks provide a TypeScript-first development experience. The most important feature is type safe routing, which enhances developer productivity and app stability. Frameworks provide a built-in link component for link generation. It reduces the risk of typos and throws type errors when linking to non-existent routes. In Expo, enable the .typed experiment and import the link component from the exporouter package. Expo supports static and dynamic routes, and throws errors for incorrect parameters. ExpoRouter provides hooks like UseSegments and UseRouter for more control. In Next.js, enable typedRoutes in the next config file. We can import the link component from the next link package and restart the dev server after updating the next config file. Next.js automatically generates route definitions and includes the type file in the TS config. Autocompletion is available for the href attribute, which can be a string or dynamic value. Next.js provides hooks like use router for static navigation and router.push to prevent redirection to broken routes. Catch all routes in type safe routing pose a challenge for enforcing type safety on the href attribute. TypeScript may not throw an error for routes that may be broken or lead to unwanted pages. Keep this in mind when working with catch all routes. Before a production build, route types should be in place to ensure accurate type definitions. Generating routes is an ongoing task that needs to happen at the right moment to avoid build-time errors. When implemented correctly, type-safe routes can elevate the developer experience by preventing broken links or dysfunctional routes. In Next.js, server components and client components have different limitations. Next.js provides automatic error checking for importing useState in server components and enforces the useClientDirective to prevent using client-related code in the wrong places. Next.js also ensures type safety by throwing errors for invalid segment config options and requiring the alt attribute for image components to improve accessibility. Config files in Expo and Next.js have different approaches to incorporating TypeScript, with Expo using the TS node require hook and Next.js supporting type checking through jsdoc in the config JS file. By enabling type-safe routing, we catch potential issues at compile time, ensuring robust routes and unbroken links. Many other frameworks and tools leverage TypeScript to empower developers and deliver error-free experiences to users.

TypeChat is an open-source library that uses TypeScript types to guide and validate responses from language models. It allows for the creation of complex responses and provides a way to repair errors in the model. TypeChat programs enable better flow of data and the ability to refer to individual steps. The math example demonstrates the use of a program translator and metaprogramming techniques for type safety. Language models trained on both code and prose perform well in this context.

The TC59 Type Annotations proposal, also known as Types with Comments, introduces the ability to run typed code in JavaScript. It aims to bring TypeScript back into JavaScript and create a separation between type system and runtime. TypeScript's popularity is on par with JavaScript, raising concerns about the influence of Microsoft. The proposal progresses by addressing runtime interaction and token soup in type specifications. Research, community involvement, and quantifying the effects of supporting this comment style are important goals.

This Talk introduces 7 essential TypeScript patterns for React development, including children, spreading props, either-or, generic components, and context. The speaker demonstrates various implementations and provides examples using a fictional dog grooming salon application. Other interesting ideas include using omit and make required types, creating components with either-or interfaces, and using generics, memorization, and context in React. The speaker also introduces the Recontextual library for context management.

Apache Kafka is a distributed, scalable, and high-throughput event streaming platform that plays a key role in event-driven architecture. It allows for the division of monolithic applications into independent microservices for scalability and maintainability. Producers and consumers are the key components in Kafka, allowing for a decoupled system. Kafka's replication and persistent storage capabilities set it apart from alternatives like Redis and RabbitMQ. Kafka provides easy access to real-time data and simplifies real-time data handling.

This Talk explores TypeScript bindings for NodeJS with Rust and WebAssembly, providing an alternative approach for creating native NodeJS modules and automatically generating types. It delves into the use of WebAssembly and Rust for TypeScript modules, showcasing how Rust functions can be defined and imported using the wasm.bindgen library. The Talk also highlights the challenges of string conversion between Rust and JavaScript, the limitations of supporting Rust data types in JavaScript, and the seamless integration of Rust functions into TypeScript apps using tspy. It concludes with the recommendation of TSFI for type-safe bindings and showcases its usage in a TypeScript-based full-text search engine with WebAssembly support.

Hello. We're going to talk today about JavaScript and how to ensure data correctness. JSON can be wasteful and has security issues, but Fastify tackles these challenges. JTD is better than JSON Schema for most API use cases, as it has a more strict structure and avoids debugging issues. Jason demonstrates how to validate data with JTD and TypeScript, ensuring data validity and improving performance. The approach of parsing JSON directly to the application type and serializing a specific type improves security and reliability.

This Talk introduces Deno, a custom JavaScript runtime similar to Node.js, and discusses the benefits of using a custom runtime. It explores the process of building a custom runtime with Deno in Rust, including the integration with Cargo and the ability to mix and match crates and APIs. The Talk also covers the implementation of the setTimeout function in both Run.js and Runtime.js, and provides examples of how to fix errors and implement additional functions. Overall, the Talk highlights the flexibility and possibilities of creating custom runtimes with Deno.

This Talk explores static analysis tooling for JavaScript and TypeScript, focusing on detecting bugs with TypeScript and ESLint. The importance of type checking and extending recommended rules is emphasized. The Talk also delves into specific ESLint rules and provides code samples to demonstrate their usage. The insights provided by ESLint powered by TypeScript are highlighted. Floating promises and misused promises are discussed, along with recommendations for handling exceptions and resources. The Talk concludes by offering resources and support for further exploration and development.

Let's talk about remixing our stack in a Monorepo workspace, which allows for incremental migration and is suitable for transitioning from a Next.js app to a remix stack. Refactoring may be required for feature-specific and Next.js-coupled components, but the process is simplified because the features have already been moved out. Configuring the Monorepo to reference packages locally and linking them to the Next.js application is necessary. Nx provides benefits like fast refreshing, pre-configured setups, and features like local and remote caching.

This Talk discusses building distributed systems in TypeScript, focusing on an e-commerce store and implementing a create order endpoint. It covers handling retry and error cases, saving order state, handling crashes and duplicate orders, and the process order function and architecture. The Talk also introduces Temporal, a durable code execution framework that simplifies fault-tolerant software development.

This Talk explains how to handle URL slug changes in Next.js by using the getStaticPaths and getStaticProps methods. It covers implementing redirects and provides a solution to eliminate the need for editors to perform additional steps. The approach involves tracking URL slug changes and issuing proper redirects. The speaker encourages the audience to reach out with any questions or experiences with handling URL slugs.

This Talk explores alternatives to TypeScript such as Clojure, Flow, and Hagel, highlighting their unique features and syntax. Flow and Hagel make finer distinctions between types and prioritize safety. TypeScript offers quick fixes for inferring types. Hagel aims for fewer type annotations and increased safety. These alternatives can provide insights and understanding of TypeScript.

The Talk discusses the use of TypeScript and SQL together in software development. It explores different approaches, such as using an ORM like TypeORM or a schema generator like pg2ts. Query builders like connects JS and tools like PGTyped are also discussed. The benefits and trade-offs of using TypeScript and SQL are highlighted, emphasizing the importance of finding a middle ground approach.

Today's Talk discusses best practices for onboarding React developers to TypeScript, including pain points faced by engineers, principles for effective onboarding, and a workshop format. The workshop covers function type expressions, annotating React functional components, and the return type of React functional components. The session emphasizes creating a safe space for hands-on practice and gradually exposing engineers to TypeScript concepts. Overall, the Talk aims to improve onboarding experiences for React developers learning TypeScript.

This Talk explores the concept of types and their relationship to variables in TypeScript, including primitive types, special types, and literal types. It also delves into unions and intersections of types, their canonical form, and their effect on sets of values. The Talk discusses object types, their defined members, and the behavior of access property checks. It highlights how unions and intersections can be used with objects and how they are reduced to a canonical form. The importance of base types in TypeScript and how they allow variables to hold instances of any subtype is also emphasized.

TypeScript for library authors offers benefits for both internal and external use, improving code quality and providing accurate understanding of libraries. Documentation and examples should be in code to provide up-to-date information. Testing types alongside unit tests ensures accurate typing. Managing changes and exposing types requires careful versioning. Deep integration of types improves usability. Using a map in TypeScript allows for simpler implementation and customization. Leveraging types in libraries can generate code based on user access. TypeScript integration with Nuxt provides support and type declarations.

When faced with challenges in supporting multiple package managers and keeping up with growth, implementing a plugin architecture can help. Extending a CLI for source control management systems like GitHub and GitLab can be done using TypeScript and Oclef CLI. TypeScript errors can be resolved by adding missing properties and implementing required functions for plugins. Supporting multiple repositories by following TypeScript errors and having the right setup can reduce time to production and onboarding. Plugin architecture with TypeScript can be a valuable tool for faster development and onboarding onto repositories.

Mark Erickson, a Senior Frontend Engineer at Replay, discusses JavaScript libraries and their support for TypeScript, including migration, versioning, and debugging. He also explores the challenges of supporting multiple TypeScript versions and designing APIs for use with TypeScript. Additionally, he shares advanced Redux type tricks and insights into maintaining a TypeScript library. The poll results reveal the widespread usage of TypeScript among developers, with many gradually migrating their codebases. Lastly, he provides tips for upgrading TypeScript and verifying functionality.

Alex introduces tRPC, a toolkit for making end-to-end type-safe APIs easily, with auto-completion of API endpoints and inferred data from backend to frontend. tRPC works the same way in React Native and can be adopted incrementally. The example showcases backend communication with a database using queries and validators, with types inferred to the frontend and data retrieval done using Prisma ORM.

Today's Talk focused on the importance of TypeScript in preventing runtime errors and its integration with popular frameworks like Vue.js, Angular, and React. TypeScript provides error assistance and typing boundaries between components, ensuring correct usage. It also allows for the creation of generic components, leveraging TypeScript generics to define contracts between unknown properties. The Talk highlighted the use of TypeScript in various scenarios, such as working with React Node, and provided resources for further learning and exploration.

This Talk covers infrastructure as code using Terraform and CDK. The speaker demonstrates how to build infrastructure for a React application, including an S3 bucket and connecting to a real domain. They also discuss configuring cache behavior, CloudFront, and remote backends. TypeScript is highlighted as a powerful language for infrastructure as code, and the importance of automation and well-documented code for global-scale infrastructures is emphasized.

Can we have themeable CSS-in-TypeScript without the runtime cost? In this talk we'll have a quick look at how this can be achieved with vanilla-extract.

The CTO of the Guild discusses the importance of keeping the GraphQL schema and TypeScript code in sync. They introduce GraphQL Cogen, a tool that generates TypeScript types and code to improve developer experience and type safety. The tool also generates ready-to-use React hooks based on Apollo Client and supports multiple languages and integration with various tools. They also discuss the introduction of Type Document Node, which generates a document node from GraphQL operations. They mention the new string manipulation features in TypeScript 4.1 and the ability to parse GraphQL type definitions with a lexer. They express the need for community help to overcome limitations in TypeScript with parsing complex and multiline strings.

This Talk discusses the safe handling of dynamic data with TypeScript using JSON Schema and TypeBox. Fastify, a web framework, allows developers to validate incoming data using JSON schema, providing type safety and error handling. TypeBox is a powerful library that allows developers to define JSON schemas and derive static types in TypeScript. The combination of JSON schema, TypeBox, and Fastify provides powerful tools for type safety and validation of dynamic data.

TypeScript's influence in the JavaScript ecosystem and its alignment with JavaScript's goals and principles. TypeScript's impact on the industry and its popularity among JavaScript programmers. The goal of TypeScript to innovate in types without introducing new concepts to JavaScript. The challenges of running TypeScript on other people's code and making it a native browser language. TypeScript's compatibility with JavaScript and its aim to be a thin layer on top of JavaScript. The efforts to improve support for JS and JS docs and the pain points of transitioning to TypeScript. The accessibility work in TypeScript and the absence of real competitors in the market.

This Talk provides an introduction to JavaScript and React, as well as insights into building real-time serverless GraphQL APIs with TypeScript, AppSync, and CDK. It covers the concepts of GraphQL schema, data sources, and resolvers, as well as the use of GraphQL subscriptions for real-time communication. The Talk also highlights the features of AppSync and CDK for building APIs and infrastructure. It concludes with a demonstration of creating an API with CDK and AppSync, including the creation of Lambda functions and DynamoDB tables.

Welcome to TypeScript plus React equals love. TypeScript features can prevent bugs in React apps. TypeScript gives confidence to remove unused props. TypeScript ensures accurate prop definitions and prevents laziness. TypeScript provides type safety and advanced patterns for better developer experience. TypeScript is a good candidate for projects, especially larger ones.

This Talk discusses the process of converting to TypeScript at CodeCademy. It emphasizes the importance of encouraging adoption and knowledge sharing within the team. The Talk also highlights the seamless integration of TypeScript into the existing infrastructure and build system. The strategy for converting to TypeScript involved using dedicated pull requests and automated tools. The speaker shares tips on automating changes, setting up a styling guide, and celebrating victories. Resources for learning TypeScript are also mentioned.