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Tina Huynh
Tina Huynh

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React with Typescript or Javascript

Which side are you on? Typescript? JavaScript?

typescript javascript circle

Typescript is in fact a superset of JavaScript, which means whatever code that runs on JavaScript will also be able to run TypeScript files. All JavaScript are valid TypeScript code but not all TypeScript are valid JavaScript code. Read that again. This concept is similar to how all CSS are valid SASS code, but not all SASS code are valid CSS code. Got it?

If you are familiar with Typescript and React, you are either running a React project with either commands:

npx create-react-app my-app --template typescript


yarn create react-app my-app --template typescript

And you are transforming React JavaScript projects into TypeScript by running either commands:

npm install — save typescript @types/node @types/react @types/react-dom @types/jest


yarn add typescript @types/node @types/react @types/react-dom @types/jest

Tip: For those who want to introduce TypeScript into their projects but don't have the energy to do so: use Bit. You are able to create, compose, and publish decoupled React components with or without TypeScript. This means you can start introducing TypeScript into an existing React application, one components at a time!

What's great about TypeScript:

  1. Easy to read and understand components
  2. Better support for JSX
  3. Gradual adoption for existing projects
  4. Benefits comes with Statics type checking and IntelliSense in general
  5. Less amount of undefined errors
  6. Better readability and maintainability

What's great about Javascript:

  1. Dynamically types
  2. Doessn't need to be compiled
  3. Doesn't use declaration files
  4. Is perfect for simple web applications
  5. Fast re-compliation time

What are your thoughts? Do you prefer working with TypeScript or JavaScript? For which projects and why?

Happy coding!

Discussion (4)

andrewbaisden profile image
Andrew Baisden

I'm team TypeScript I like the improved error checking.

hiepdd91 profile image
Doan Duc Hiep

Không cần phải bàn cãi, bạn nên dùng Typescript vì nó sẽ tự động gợi ý các thuộc tính và check lỗi trong Code Editing. Hơn nữa là những code đó sẽ được tái sử dụng và kế thừa trong suốt dự án. Sử dụng Typescript chắc chắn mang lại nhiều lợi ích hơn so với việc bỏ thời gian ra viết nó.

tmchuynh profile image
Tina Huynh Author

I wish I could read vietnamese well lol

brense profile image
Rense Bakker

Just a headsup, @types packages and other packages that are only used to build the code, like typescript, should go into dev dependencies npm i --save-dev typescript @types/...