es-toolkit/dist/array/unionBy.js

A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.

'use strict';

Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });

const uniqBy = require('./uniqBy.js');

function unionBy(arr1, arr2, mapper) {
    return uniqBy.uniqBy(arr1.concat(arr2), mapper);
}

exports.unionBy = unionBy;