ReactJS and Typescript : refers to a value, but is being used as a type here (TS2749)

ReactJS and Typescript: Refers to a value, but is being used as a type here (TS2749)

ReactJS and Typescript are two popular technologies used in web development. ReactJS is a JavaScript library for building user interfaces, while Typescript is a typed superset of JavaScript that adds static typing to the language. When using ReactJS with Typescript, you may encounter an error message that says “Refers to a value, but is being used as a type here (TS2749)”. This error typically occurs when there is a mismatch between the type and value being used in your code.

There are a few common scenarios where this error can occur:

1. Incorrectly Importing a Component

If you are importing a component from a different file and using it in your code, make sure you are importing the component itself and not its value. To fix this error, you need to import the component’s type definition instead of the component itself.

Here’s an example:

// Incorrect
import MyComponent from './MyComponent';

// Correct
import { MyComponent } from './MyComponent';

2. Incorrectly Defining Props

When defining props for a component, make sure you are using the correct type annotations. The error can occur if you mistakenly use a value instead of a type annotation for the props.

Here’s an example:

// Incorrect
interface MyComponentProps {
  name: 'John';
  age: 25;
}

// Correct
interface MyComponentProps {
  name: string;
  age: number;
}

3. Using a Value as a Type

This error can also occur if you accidentally use a value as a type annotation. Make sure you are using the correct type annotation for your variables, functions, or components.

Here’s an example:

// Incorrect
const name: 'John' = 'John';

// Correct
const name: string = 'John';

By following these guidelines, you should be able to resolve the “Refers to a value, but is being used as a type here (TS2749)” error in your ReactJS and Typescript code.

Happy coding!