`*` is the namespace object. `default` is a special named property on the namespace object.

someModule.js:

    export default 'foo';
    export const bar = 'bar';

namespaceImport.js:

    import * as SomeNamespace from './someModule.js';
    console.assert(SomeNamespace.default === 'foo');
    console.assert(SomeNamespace.bar === 'bar');

defaultImport.js:

    import foo from './someModule.js';
    console.assert(foo === 'foo');

namedImports.js:

    import { default as foo, bar } from './someModule.js';
    console.assert(foo === 'foo');
    console.assert(bar === 'bar');