Practical solutions

TypeScript Howtos How-To Guides

Solve the problem. Keep building. Collection of TypeScript how-to articles

Find the answer you need

Browse practical solutions, grouped by the task you're working on.

__COUNT__ entries on this page

How to Watch and Reload Ts-Node When Files Change in TypeScriptThis article covers the ways to watch and reload TypeScript files when they change. Discover methods like ts-node-dev, Nodemon, and TypeScript's watch mode to enhance your development workflow. Follow our step-by-step guide to transpile TypeScript files automatically and streamline your coding process. How to Represent Integer in TypeScriptThis tutorial demonstrates how to represent integers in TypeScript, covering the number type, BigInt, and enums. Learn effective methods to manage integers, ensuring type safety and precision in your TypeScript applications. Enhance your coding skills with practical examples and best practices for integer representation in TypeScript. Dictionary or Map Type in TypeScriptIn this article, discover how to represent a map or dictionary in TypeScript. Learn about the differences between using objects and the Map class, along with practical examples and best practices for efficient data handling. Enhance your TypeScript skills and improve your application performance by mastering these essential data structures. Question Mark Operator in TypeScriptThis comprehensive tutorial explores the question mark operator in TypeScript, focusing on its role in defining optional parameters. Discover how this feature enhances code flexibility and readability while simplifying function definitions. Learn best practices for using optional parameters effectively and improve your TypeScript skills today. Declaration or Statement Expected Error in TypeScriptThis tutorial provides a comprehensive understanding of the "Declaration or Statement Expected" error in TypeScript. Learn about common causes, debugging techniques, and how to effectively resolve this syntax issue to enhance your TypeScript coding skills. How to Dynamically Assign Properties to an Object in TypeScriptThis tutorial demonstrates how to dynamically assign properties to an object in TypeScript. Learn effective methods including index signatures, the Record utility type, and generics to enhance your TypeScript skills. Explore practical code examples and best practices for creating adaptable applications that handle dynamic data structures. TypeScript CommentsDiscover the importance of TypeScript comments in generating API documentation. Learn about different comment types, best practices, and how to use TSDoc for effective documentation. Enhance your code's readability and maintainability with clear comments. TypeScript TypeofThis tutorial demonstrates the typeof operator in TypeScript, a powerful tool for determining variable types at runtime. Learn how to use typeof in type guards, create type aliases, and validate data effectively. Enhance your TypeScript coding skills with practical examples and insights. How to Parse JSON Strings in TypeScriptThis tutorial demonstrates how to parse JSON strings in TypeScript. Learn to use JSON.parse(), define interfaces for type safety, and handle nested JSON objects effectively. Enhance your TypeScript projects with robust data handling techniques and best practices for working with JSON. How to Enforce Types for Indexed Members in TypeScript ObjectsThis tutorial demonstrates how to enforce types for indexed members in TypeScript objects. Explore indexed access types, mapped types, and conditional types to enhance type safety and maintainability in your applications. Master these techniques to build robust TypeScript code. How to Sleep in TypeScriptThis tutorial demonstrates how to sleep a thread in TypeScript, exploring various methods to implement delays in your code. Learn to use promises, async/await, and setTimeout for effective asynchronous programming. Whether you're fetching data or managing user interactions, mastering sleep functionality will enhance your TypeScript skills and improve your application's flow. The as Keyword in TypeScriptThis tutorial demonstrates the purpose of the as keyword in TypeScript, exploring its role in type assertions. Learn how to effectively use the as keyword with interfaces, union types, and complex data structures. Improve your TypeScript skills and enhance your development workflow with this comprehensive guide. How to Convert an Object Into a JSON String in TypeScriptThis tutorial discusses how to turn an object into a JSON string in TypeScript with examples. Learn to use JSON.stringify() and customize your JSON output for better data handling. Discover how to manage nested objects and pretty-print JSON strings for improved readability. How to Format String in TypeScriptThis tutorial demonstrates how to format strings in TypeScript using various methods, including template literals, string concatenation, the replace() method, and the Intl API for internationalization. Enhance your TypeScript skills with these effective string formatting techniques to create dynamic and user-friendly outputs. How to Cast a Number to String in TypeScriptThis tutorial provides a comprehensive understanding of how to cast a number to a string in TypeScript. Explore various methods and techniques, including the String() function, toString() method, template literals, and string concatenation. Enhance your coding skills and improve data handling with these practical examples. How to Filter an Array in TypeScriptThis tutorial demonstrates how to filter an array in TypeScript, covering methods like the filter function, filtering objects, and chaining with other array methods. Enhance your TypeScript skills with clear examples and practical applications to improve your coding efficiency. How to Use the declare Keyword in TypeScriptThis tutorial guideline provides a deep understanding of the purpose of the declare keyword in TypeScript. Explore its implementations and coding examples to enhance your knowledge. Learn how to declare variables, functions, and modules effectively, and improve your TypeScript coding experience. How to Use Uuid in TypeScript Nodejs AppThis tutorial illustrates the ways to use UUID in a TypeScript Node.js app. Learn how to generate and utilize UUIDs effectively with complete coding examples and step-by-step demonstrations. Enhance your application's reliability and scalability by incorporating unique identifiers seamlessly. How to Use of the never Keyword in TypeScriptThis tutorial provides an in-depth understanding of the never keyword in TypeScript. Learn how to use the never type effectively with practical coding examples and various use cases, enhancing your TypeScript skills and improving code quality. How to Initialize an Array in TypeScriptLearn how to initialize an array in TypeScript with this comprehensive tutorial. Explore various methods, including array literals, the Array constructor, the spread operator, and Array.of(). Each method is explained with clear code examples to help you understand how to effectively work with arrays in TypeScript. Whether you're a beginner or looking to enhance your skills, this guide provides the knowledge you need to master array initialization in TypeScript. How to Implement Class Constants in TypeScriptLearn how to implement class constants in TypeScript using the readonly and static keywords. This article provides clear examples and explanations to help you understand their usage effectively. Whether you're a beginner or an experienced developer, mastering class constants will enhance your coding skills and improve code maintainability. The console.log Method in TypeScriptThis tutorial explores the console.log() method in TypeScript, detailing its syntax, usage, and best practices for effective logging. Discover how to log different data types, improve readability with template literals, and utilize console.log for error handling. Whether you're a beginner or an experienced developer, mastering console.log will enhance your debugging skills and streamline your development process. How to Enumerate String in TypeScriptThis tutorial demonstrates what a string enum is in TypeScript, explaining how to use it effectively in your code. Discover the advantages of string enums, including improved readability and type safety. Learn how to implement string enums in functions and switch statements, enhancing your TypeScript skills. TypeScript forEach() LoopDiscover how to effectively use the forEach() loop in TypeScript. This comprehensive guide covers everything from basic usage to handling arrays of objects and asynchronous operations. Learn practical examples and best practices to enhance your TypeScript programming skills.