You want to assign the value of module.exports to be your default function, and then put all the named exports as properties on that function.
const defaultFunction = () => { console.log('default!'); };
const namedFunction1 = () => { console.log('1!'); };
const namedFunction2 = () => { console.log('2!'); };
const myModule = module.exports = defaultFunction;
myModule.namedFunction1 = namedFunction1;
myModule.namedFunction2 = namedFunction2;
Let’s say that was in myModule.js. Then you can do this:
const myModule = require('./myModule');
myModule(); // Prints: 'default!'
myModule.namedFunction1(); // Prints: '1!'