with es2015 modules, every file can export both "named exports" and a "default export". But the "default export" is just an export with the name "default". To do a named export, you can do:
const foo = 5;
function bar() {}
class Baz {}
export { foo, bar, Baz };
// or
export const foo = 5; // uses the name of the variable declaration
export function bar() {} // uses the name of the function