The requested module does not provide an export named 'default'

Question

I am having some problems with the React project that I am currently working on. I use Vite as my build tool and for the last 2 or 3 days I see that sometimes I receive this error: Uncaught SyntaxError: The requested module '/src/Components/App/HamburgerMenu.tsx?t=1683406454267' does not provide an export named 'default' .

All my .tsx files have an exported default variable, and it works for every file most of the time, but sometimes I get this error, seemingly random. I cannot find a reason why it may happen but it can happen at any time when I save something in a file, it does not happen every time, just sometimes and it seems that for no reason, then it solves by itself after I save a few more times and/or I reload the page.

Edit: I am doing the imports and exports like this:

import Component from '../../Component'

and exporting

export default function Component () {...
}

Answer 1

This was driving me nuts as well. The issue turned out to be the way in which you write the import statement:

import someFunction from '../../Component'

When written in this manner, without brackets, it causes the compiler to look for a default export. Whatever it finds as a default export will become someFunction.

This is not the same as:

import { someFunction } from '../../Component'

Which causes it to go look for a named export explicitly called someFunction.

So somewhere in your code, you are trying to use a default export (no brackets) and the source file does not have one defined as default.

Answer 2

1.if the module has named exports, you can import them by name instead of using the default import. For example:

import { myFunction } from './myModule';

2.if you control the module causing the error, you can add a default export. For example:

// myModule.js

export const myFunction = () => { /* function code here */ };

export default myFunction;

This exports a named export myFunction as well as a default export myFunction, which can be imported using the import statement with a default import:

import myFunction from './myModule';

3.if you want to import all of the exports from a module, you can use a wildcard import. For example:

import * as myModule from './myModule';