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Table of Contents

TOP 13 Facts about TypeScript

  • TypeScript is a programming language developed and maintained by Microsoft.
  • It is a superset of JavaScript, meaning that any valid JavaScript code is also valid TypeScript code.
  • TypeScript introduces static typing to JavaScript, allowing developers to define and enforce types for variables, functions, and objects.
  • Static typing helps catch errors at compile-time, reducing the likelihood of runtime errors and improving code quality.
  • TypeScript supports object-oriented programming features such as classes, interfaces, and inheritance.
  • It provides a more robust tooling experience compared to JavaScript, with features like code navigation, autocompletion, and refactoring support in popular code editors.
  • TypeScript compiles down to plain JavaScript, which means it can run in any JavaScript runtime environment.
  • It has gained significant popularity in recent years, with many large companies, including Google, Airbnb, and Slack, adopting TypeScript for their projects.
  • TypeScript offers better scalability and maintainability for large codebases, thanks to its support for modules and namespaces.
  • With TypeScript, developers can take advantage of modern ECMAScript features and syntax, even if the target runtime environment does not support them natively.
  • It has an active and vibrant community, with numerous open-source libraries and frameworks built specifically for TypeScript.
  • TypeScript is backed by excellent documentation and a dedicated team of developers, ensuring continuous improvement and support.
  • According to the Stack Overflow Developer Survey 2021, TypeScript was the second most loved programming language and the third most wanted programming language among developers.

Cases when TypeScript does not work

  1. TypeScript does not work when there are syntax errors in the code.
  2. TypeScript may not work when the TypeScript compiler is not installed or configured correctly.
  3. TypeScript may not work when there are incompatible or missing dependencies in the project.
  4. TypeScript may not work when there are conflicts between different TypeScript versions or with other tools in the development environment.
  5. TypeScript may not work when there are issues with the TypeScript compiler itself, such as bugs or limitations.
  6. TypeScript may not work when there are issues with the type definitions of external libraries or modules.
  7. TypeScript may not work when there are issues with the configuration file (tsconfig.json) that defines the project settings.
  8. TypeScript may not work when there are limitations in the language itself, such as the inability to express certain runtime behaviors or lack of support for specific programming paradigms.
  9. TypeScript may not work when there are performance concerns, as the additional type checking and compilation steps can introduce overhead compared to writing plain JavaScript.
  10. TypeScript may not work when there is resistance or lack of support from the development team or organization, leading to limited adoption or inconsistent usage.

What are top TypeScript instruments and tools?

  • Visual Studio Code: Visual Studio Code is a free and open-source code editor developed by Microsoft. It has built-in support for TypeScript and provides various features like intelligent code completion, debugging, and Git integration. It has gained immense popularity among developers and is widely used for TypeScript development.
  • Angular: Angular is a popular JavaScript framework for building web applications. It was initially developed by Google and is now maintained by Google and a community of individual developers and corporations. Angular has excellent TypeScript support and provides features like component-based architecture, dependency injection, and two-way data binding.
  • Webpack: Webpack is a module bundler widely used in modern web development. It helps optimize and bundle JavaScript and TypeScript code and their dependencies into a single file or multiple files for efficient delivery to browsers. It allows developers to manage complex project structures and improve performance through code splitting and lazy loading.
  • ESLint: ESLint is a widely used linter tool that helps enforce coding standards and catch potential errors in JavaScript and TypeScript code. It provides customizable rulesets and integrates well with popular code editors and build tools. ESLint helps maintain code quality and consistency in TypeScript projects.
  • Jest: Jest is a powerful JavaScript testing framework developed by Facebook. It has built-in support for TypeScript and provides a simple and intuitive API for writing unit tests. Jest offers features like snapshot testing, code coverage reporting, and parallel test execution, making it a popular choice for testing TypeScript applications.
  • TSLint: TSLint is a static analysis tool specifically designed for TypeScript. It helps identify potential issues, enforce coding conventions, and improve code readability. Although TSLint is being deprecated in favor of ESLint, it still remains widely used in existing TypeScript projects.
  • TypeORM: TypeORM is an Object-Relational Mapping (ORM) library for TypeScript and JavaScript. It provides a convenient way to interact with databases using object-oriented programming techniques. TypeORM supports various database systems and offers features like query building, migrations, and entity relationships.

Soft skills of a TypeScript Developer

Soft skills are an essential component of a TypeScript Developer’s toolkit, enabling them to effectively collaborate, communicate, and adapt in a professional environment. Here are the key soft skills required at different levels of experience:


  • Problem-solving: Ability to analyze and solve coding challenges using TypeScript.
  • Teamwork: Capability to work collaboratively in a development team, sharing ideas and contributing to group projects.
  • Communication: Strong verbal and written communication skills to effectively express ideas and collaborate with team members.
  • Time Management: Efficiently managing time and prioritizing tasks to meet project deadlines.
  • Adaptability: Flexibility to adapt to changing project requirements and learn new technologies.


  • Leadership: Demonstrating leadership qualities by taking ownership of tasks and guiding junior developers.
  • Problem-solving: Advanced problem-solving skills to handle complex coding challenges and find innovative solutions.
  • Critical Thinking: Ability to think critically and make logical decisions to optimize code and improve performance.
  • Collaboration: Collaborating effectively with cross-functional teams, including designers and product managers.
  • Mentoring: Mentoring junior developers, providing guidance and support in their professional growth.
  • Time Management: Efficiently managing time and resources to ensure timely project delivery.
  • Adaptability: Quickly adapting to new technologies, frameworks, and tools to stay ahead of industry trends.


  • Strategic Thinking: Ability to think strategically and contribute to the overall direction and roadmap of a project.
  • Conflict Resolution: Expertise in resolving conflicts within the team and maintaining a positive work environment.
  • Decision-making: Making informed decisions based on technical expertise, business requirements, and industry best practices.
  • Project Management: Managing and overseeing the successful execution of multiple projects simultaneously.
  • Communication: Excellent communication skills to effectively convey complex technical concepts to non-technical stakeholders.
  • Innovation: Driving innovation by exploring new technologies and proposing improvements to existing systems.
  • Adaptability: Adapting to changing business needs and driving organizational change when necessary.
  • Continuous Learning: Actively seeking opportunities to enhance knowledge and skills through self-learning and professional development.

Expert/Team Lead

  • Strategic Leadership: Providing strategic direction and leading teams towards the achievement of project goals.
  • Team Management: Managing and mentoring a team of developers, ensuring their professional growth and performance.
  • Stakeholder Management: Building and maintaining positive relationships with clients, stakeholders, and senior management.
  • Technical Expertise: Deep knowledge and expertise in TypeScript and related technologies.
  • Innovation: Driving innovation within the team by exploring new technologies and industry best practices.
  • Decision-making: Making critical decisions and trade-offs to ensure project success and align with business objectives.
  • Effective Communication: Excellent communication skills to convey technical information to both technical and non-technical stakeholders.
  • Continuous Improvement: Identifying opportunities for process improvement and implementing best practices.
  • Conflict Resolution: Expertly resolving conflicts and facilitating collaboration within the team.
  • Strategic Planning: Developing long-term strategies and roadmaps to guide the development team and align with business objectives.
  • Business Acumen: Understanding of business goals and aligning development efforts to drive business value.

TOP 13 Tech facts and history of creation and versions about TypeScript Development

  • TypeScript is a statically typed superset of JavaScript that compiles to plain JavaScript, providing optional static typing and improved tooling. It was developed by Microsoft.
  • Anders Hejlsberg, known for his work on Turbo Pascal and C#, is the creator of TypeScript. Hejlsberg wanted to enhance JavaScript’s scalability, hence the birth of TypeScript in 2012.
  • TypeScript 1.0 was released in October 2012. It introduced classes, modules, and interfaces into JavaScript, making it more suitable for large-scale applications.
  • One of the groundbreaking features of TypeScript is its support for static typing. This allows developers to catch errors at compile-time rather than at runtime, resulting in more robust code.
  • With TypeScript, developers can leverage the latest ECMAScript features while ensuring compatibility with older browsers. The TypeScript compiler transpiles the code to JavaScript, targeting different ECMAScript versions.
  • In 2016, TypeScript 2.0 was released, bringing significant improvements such as non-nullable types, control flow analysis, and simplified declaration file acquisition.
  • TypeScript’s adoption has been remarkable. It is widely used by tech giants like Microsoft, Google, and Airbnb, as well as in popular frameworks such as Angular and React.
  • TypeScript has a vibrant and active community. As of 2021, it has over 90k stars on GitHub, with thousands of contributors and a vast ecosystem of libraries and tools.
  • Microsoft actively maintains and develops TypeScript, ensuring regular updates and improvements. The language has a well-defined roadmap and a dedicated team of developers working on its evolution.
  • One of the key advantages of TypeScript is its tooling support. IDEs like Visual Studio Code provide rich features for TypeScript development, including intelligent code completion, refactoring, and debugging.
  • TypeScript offers excellent documentation and resources for learning. The official TypeScript Handbook provides comprehensive guidance on language features, best practices, and integration with popular frameworks.
  • As TypeScript compiles to JavaScript, it can seamlessly integrate with existing JavaScript codebases. Developers can gradually introduce TypeScript into their projects without the need for a complete rewrite.
  • TypeScript’s popularity continues to grow rapidly. According to the Stack Overflow Developer Survey 2020, TypeScript was ranked as the 4th most loved programming language among developers.

Pros & cons of TypeScript

7 Pros of TypeScript

  • Type Safety: TypeScript provides static typing which helps catch errors during development, reducing the likelihood of runtime errors in production.
  • Enhanced Tooling: TypeScript offers great tooling support, including code completion, refactoring, and better IntelliSense, which improves developer productivity.
  • Strong Object-Oriented Programming (OOP) Features: TypeScript supports classes, interfaces, inheritance, and other OOP concepts, making it easier to write and maintain complex applications.
  • Better Scalability: TypeScript allows developers to build large-scale applications more easily by providing features like modules, namespaces, and advanced type checking.
  • Improved Collaboration: TypeScript enhances collaboration among developers by allowing them to understand each other’s code more easily due to the added type annotations and clear interfaces.
  • Compatibility: TypeScript is a superset of JavaScript, meaning that existing JavaScript code can be gradually migrated to TypeScript, making it easy to adopt for existing projects.
  • Active Community and Support: TypeScript has a large and active community, which means there are plenty of resources, libraries, and frameworks available for developers to leverage.

7 Cons of TypeScript

  • Additional Learning Curve: TypeScript introduces new concepts and syntax, which may require developers to spend time learning and adapting to the language.
  • Compilation Overhead: TypeScript code needs to be compiled to JavaScript before it can be executed, adding an extra step to the development process.
  • Strictness: The static typing in TypeScript can be seen as too strict for some developers, especially those coming from dynamic languages.
  • Tooling Dependencies: Some advanced tooling features in TypeScript may require additional dependencies, increasing the complexity of the development environment.
  • Increased Development Time: The additional type annotations and strictness of TypeScript can sometimes slow down development, particularly for small projects or prototypes.
  • Compatibility Issues: TypeScript’s compatibility with existing JavaScript libraries and frameworks may not always be seamless, requiring additional effort for integration.
  • Runtime Overhead: The compilation process and type checking in TypeScript may result in slightly larger file sizes and slightly slower runtime performance compared to pure JavaScript.

How and where is TypeScript used?

Case NameCase Description
Angular ApplicationsTypeScript is the recommended language for building Angular applications. It provides strong typing, better code organization, and improved tooling support. TypeScript’s static analysis helps catch errors early in the development process, reducing bugs and enhancing code quality. The combination of TypeScript and Angular allows for faster development, easier maintenance, and improved scalability.
Node.js DevelopmentTypeScript can be used to develop server-side applications with Node.js. It brings the benefits of static typing, enhanced code structure, and better maintainability to Node.js projects. TypeScript’s type checking helps identify common programming mistakes, leading to more reliable and robust Node.js applications. Additionally, TypeScript’s compatibility with existing JavaScript code makes it a seamless choice for Node.js developers.
React Native AppsTypeScript can be utilized in the development of React Native applications. By using TypeScript in the React Native ecosystem, developers can leverage type checking, code navigation, and autocompletion features provided by TypeScript’s language services. This results in improved productivity, reduced errors, and enhanced code readability. TypeScript also helps in better module management and enables seamless integration with existing JavaScript libraries.
Enterprise-scale JavaScript ProjectsTypeScript is particularly useful for large-scale JavaScript projects in enterprise environments. Its static typing feature helps identify errors at compile-time, reducing the chance of runtime issues. The ability to define interfaces and enforce strict typing ensures better code maintainability and collaboration within development teams. TypeScript’s support for modern JavaScript features, such as ECMAScript modules and async/await, makes it an ideal choice for complex enterprise applications.
Library and Framework DevelopmentTypeScript is commonly used for developing libraries and frameworks that are shared across multiple projects. By providing static types, TypeScript allows developers to define clear APIs and ensure the correctness of their implementations. TypeScript’s tooling support, including code navigation, refactoring, and type inference, enables faster development and easier maintenance of libraries and frameworks. This makes TypeScript a preferred choice for creating reusable code components.
Migration from JavaScript to TypeScriptTypeScript offers a smooth migration path for existing JavaScript projects. Developers can gradually introduce TypeScript into their codebase, converting individual files or modules as needed. This incremental adoption allows for flexibility and minimizes disruption to ongoing development. TypeScript’s compatibility with JavaScript means that existing libraries and frameworks can be seamlessly integrated into the TypeScript ecosystem, making it an attractive option for migrating JavaScript projects to a typed environment.

Let’s consider Difference between Junior, Middle, Senior, Expert/Team Lead developer roles.

Seniority NameYears of experienceResponsibilities and activitiesAverage salary (USD/year)
Junior Developer0-2 yearsAssisting with basic programming tasks, bug fixing, and code maintenance. Learning and gaining experience in various programming languages and frameworks. Collaborating with team members on smaller projects.38,000 – 58,000
Middle Developer2-5 yearsDeveloping components and features for larger projects. Participating in code reviews and contributing to software design decisions. Collaborating with cross-functional teams for project delivery. Mentoring junior developers.58,000 – 78,000
Senior Developer5-8 yearsLeading the development of complex software modules or systems. Providing technical guidance to team members. Collaborating with stakeholders to define project requirements and architecture. Ensuring high-quality code through code reviews and testing.78,000 – 100,000
Expert/Team Lead Developer8+ yearsLeading development teams and managing project timelines. Making strategic technical decisions and providing guidance on architecture and design. Mentoring and coaching developers. Collaborating with stakeholders to align technical solutions with business goals.100,000 – 150,000+

TOP 10 TypeScript Related Technologies

  • TypeScript

    TypeScript is a popular programming language that is a superset of JavaScript. It adds static typing to JavaScript, making it easier to catch errors early in the development process. TypeScript is widely adopted in the industry and has a large and active community.

  • React

    React is a JavaScript library for building user interfaces. It is widely used in TypeScript software development due to its component-based architecture, which enables developers to build reusable UI components. React is known for its performance and scalability, making it a popular choice for building complex web applications.

  • Angular

    Angular is a TypeScript-based framework for building web applications. It provides a full-featured development environment with features like two-way data binding, dependency injection, and a powerful CLI. Angular has a strong ecosystem and is widely adopted by enterprise-level applications.

  • Node.js

    Node.js is a runtime environment that allows developers to run JavaScript on the server-side. It is frequently used in TypeScript software development to build scalable and efficient back-end applications. Node.js has a large package ecosystem, known as npm, which provides a wide range of ready-to-use modules.

  • Express.js

    Express.js is a minimalist web application framework for Node.js. It is commonly used in TypeScript software development to build RESTful APIs and web applications. Express.js is known for its simplicity and ease of use, making it a popular choice for building lightweight and fast server-side applications.

  • Webpack

    Webpack is a module bundler that is widely used in TypeScript software development to bundle JavaScript modules for the web. It allows developers to write modular code and efficiently manage dependencies. Webpack also provides features like code splitting, lazy loading, and hot module replacement.

  • Jest

    Jest is a JavaScript testing framework that is commonly used in TypeScript software development to write unit tests. It provides a simple and intuitive API for writing test cases and has built-in support for mocking and code coverage. Jest is known for its speed and ease of use, making it a popular choice for testing TypeScript applications.

Hard skills of a TypeScript Developer

Hard skills of a TypeScript Developer:


  • TypeScript Fundamentals: Understanding the basics of TypeScript, including static typing and type inference.
  • JavaScript: Proficiency in JavaScript, as TypeScript is a superset of JavaScript.
  • Object-Oriented Programming (OOP): Familiarity with OOP concepts like classes, objects, inheritance, and encapsulation.
  • Node.js: Knowledge of Node.js and its ecosystem for building server-side applications.
  • Version Control: Experience with version control systems like Git for collaborative development.


  • Advanced TypeScript Features: Deep understanding of advanced TypeScript features like decorators, generics, and modules.
  • Front-End Frameworks: Proficiency in popular front-end frameworks like Angular or React, and their integration with TypeScript.
  • Testing: Knowledge of testing frameworks like Jest or Jasmine to write unit tests for TypeScript code.
  • Design Patterns: Familiarity with commonly used design patterns in TypeScript development.
  • API Integration: Experience in integrating with APIs using libraries like Axios or Fetch.
  • Debugging and Troubleshooting: Ability to debug and troubleshoot TypeScript code using tools like Chrome DevTools.
  • Package Managers: Proficiency in using package managers like npm or Yarn to manage dependencies.


  • Performance Optimization: Expertise in optimizing TypeScript code for better performance and efficiency.
  • Code Review: Ability to conduct thorough code reviews and provide constructive feedback to team members.
  • Architecture and Design: Experience in designing scalable and maintainable TypeScript applications.
  • Database Integration: Knowledge of integrating TypeScript applications with databases like MongoDB or PostgreSQL.
  • Continuous Integration/Continuous Deployment (CI/CD): Understanding of CI/CD pipelines to automate build and deployment processes.
  • Security: Awareness of common security vulnerabilities and best practices in TypeScript development.
  • Code Documentation: Proficiency in writing clear and concise code documentation for better code maintainability.
  • Team Collaboration: Experience in collaborating with cross-functional teams and mentoring junior developers.

Expert/Team Lead

  • Advanced Algorithms and Data Structures: Profound knowledge of advanced algorithms and data structures for efficient problem-solving.
  • Performance Tuning: Ability to optimize performance bottlenecks and fine-tune TypeScript applications.
  • Codebase Refactoring: Expertise in refactoring complex codebases to improve code quality and maintainability.
  • Project Management: Experience in leading and managing software development projects using Agile methodologies.
  • Code Standards and Best Practices: Enforcing code standards and best practices across the development team.
  • Codebase Scaling: Ability to scale TypeScript applications to handle high traffic and large datasets.
  • Technical Leadership: Providing technical guidance and leadership to the development team.
  • Emerging Technologies: Keeping up-to-date with the latest trends and advancements in the TypeScript ecosystem.
  • Collaborative Problem-Solving: Proven ability to collaborate and solve complex problems as part of a team.
  • Code Review and Mentoring: Conducting in-depth code reviews and mentoring junior and mid-level developers.
  • Performance Optimization Strategies: Implementing advanced performance optimization strategies for large-scale applications.

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