export variables react

Export Variables in React

If you are working with React, then you must be familiar with the concept of modules. Modules are a way of organizing code by splitting it up into multiple files. In React, we use modules to create reusable components that we can use across our application.

When you create a module in React, you can export variables, functions, and classes from that module. Exporting variables allows you to use them in other modules.

Exporting a Variable in React

To export a variable from a module in React, you can use the export keyword.

// module.js
export const myVariable = "Hello, world!";

Now you can import this variable into another module using the import keyword.

// app.js
import {myVariable} from "./module.js";

console.log(myVariable); // Output: Hello, world!

You can also export multiple variables from a module by separating them with commas.

// module.js
export const variable1 = "Hello";
export const variable2 = "World";

And you can import them into another module like this:

// app.js
import {variable1, variable2} from "./module.js";

console.log(variable1 + ", " + variable2); // Output: Hello, World

Exporting a Variable as Default

You can also export a variable as the default export of a module. This allows you to import it without using curly braces.

// module.js
const myVariable = "Hello, world!";

export default myVariable;

Now you can import it like this:

// app.js
import myVariable from "./module.js";

console.log(myVariable); // Output: Hello, world!

You can also export a function or a class as the default export of a module.

// module.js
export default function myFunction() {
  console.log("Hello, world!");
}

And you can import it like this:

// app.js
import myFunction from "./module.js";

myFunction(); // Output: Hello, world!

Conclusion

In React, exporting variables from a module is a powerful way to organize your code and create reusable components. Whether you are exporting a single variable or multiple ones, or exporting a variable as the default export of a module, the process is simple and straightforward.