How to add a custom library to a scratch file

In PhpStorm/WebStorm how can I add a custom library so that the file compiles? In my case it would be Lodash?

I tried to add lodash to global libs but it did not help...

Using require and relative paths.

Here is a crazy example of using lodash in a scratch file:

const _ = require('./../../../DEV/node_modules/lodash');

var anything = [1, 2];

_.map(anything, function (item) {
    console.log('Working >-P');
    return item;
});