Library code in src/

add.js

// src/arithmetic/add.js
import add from 'lodash/add';

export default (augend, addend) => add(augend, addend);

index.js

// src/index.js
export { default as max } from './range/max';
export { default as add } from './arithmetic/add';

max.js

// src/range/max.js
import { maxBy } from 'lodash/maxBy';

export default array => max(array);