lodash: only importing chain does not work nice

Question

The following code works:

let _ = require('lodash');
let arr= _([1,2,3,4]);
let b = arr.map((e)=>e^2);

The following does not work:

let chain = require('lodash/chain');
let arr= chain([1,2,3,4]);
let b = arr.map((e)=>e^2);

It gives me the following error:

arr.map is not defined.

Is there a way to use chain without importing the whole global object?

Answer 1

You need at least core:

var _ = require('lodash/core');
let arr= _([1,2,3,4]);
let b = arr.map((e)=>e^2);

You can also roll your own custom lodash package.