Module has no default export Error in TypeScript

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Borislav Hadzhiev

Last updated: Feb 22, 2022

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Module has no default export Error in TypeScript #

The "Module has no default export" error occurs when we try to import as default from a module that doesn't have a default export. To solve the error make sure the module has a named export and wrap the import in curly braces, e.g. import {myFunction} from './myModule'.

module has no default export error

Here is an example of how the error occurs. This is our index.ts file.

index.ts
// 👇️ named export export function sum(a: number, b: number) { return a + b; }

And this is a file that imports the function from index.ts.

another-file.ts
// ⛔️ Error: Module '"X"' has no default export. // 👇️ default import import sum from './index'; console.log(sum(5, 15));

Notice that in our index.ts file we used a named export, but when we imported the function in the other file we used a default import. This is the reason the error occurs.

To solve the error "Module has no default export", make sure:

  1. To wrap named exports in curly braces when importing them
  2. Use the default keyword when exporting a value as a default export
  3. Each module only has a maximum of 1 default export, but could have multiple named exports

Here is an example of how to solve the error using a default export.

index.ts
// 👇️ default export export default function sum(a: number, b: number) { return a + b; }

And import the function in the other file.

another-file.ts
// 👇️ default import import sum from './index'; console.log(sum(5, 15));

Notice that we do not use curly braces when working with default imports.

You can have a maximum of 1 default export per file.

If you are exporting a variable as a default export, you have to declare it on 1 line and export it on the next. You can't declare and default export a variable on the same line.

index.ts
const str = 'hello'; export default str;

You can only have a single default export per module, but you can have multiple named exports.

Here is how you use named imports/exports.

index.ts
// 👇️ named export export function sum(a: number, b: number) { return a + b; }

And now we use a named import in the other file.

index.ts
// 👇️ named import import { sum } from './index'; console.log(sum(5, 15));

Notice the curly braces, this is how we import a named export.

You have to be consistent with your imports and exports. Don't use curly braces when importing default exports and use curly braces when importing named exports.

You can also mix and match, here's an example.

index.ts
// 👇️ named export export const num = 33; // 👇️ default export export default function sum(a: number, b: number) { return a + b; }

And here are the imports.

index.ts
// 👇️ default and named import import sum, { num } from './index'; console.log(sum(num, 10));

We used a default import to import the sum function and a named import to import the num variable.

Conclusion #

To solve the error "Module has no default export", be consistent with your ES6 imports and exports. If a value is exported as a default export, it has to be imported as a default import and if it's exported as a named export, it has to be imported as a named import.

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