import * as allExports from './index.js';
import { mixin } from './index.js';In this module, we mix our bundled exports into the _ object and export
the result. This is analogous to setting module.exports = _ in CommonJS.
Hence, this module is also the entry point of our UMD bundle and the package
entry point for CommonJS and AMD users. In other words, this is (the source
of) the module you are interfacing with when you do any of the following:
// CommonJS
var _ = require('underscore');
// AMD
define(['underscore'], function(_) {...});
// UMD in the browser
// _ is available as a global variableimport * as allExports from './index.js';
import { mixin } from './index.js';Add all of the Underscore functions to the wrapper object.
var _ = mixin(allExports);Legacy Node.js API.
_._ = _;Export the Underscore API.
export default _;