Export by default in JavaScript

Only one value can be exported from an ES module. This is done with the export default command. When exporting using this command, it is the imported value that will get into the variable when importing a module.

Let's look at examples. We export one function:

src/test.jsexport default function() {
  return 'text';
};

Let's do the import:

src/index.jsimport test from './test.js';

We check the function:

src/index.jslet res = test();
console.log(res);