Uncaught TypeError: $ is not a function in core-js - node.js

Question

I'm trying to install the BigCommerce Open Checkout script, and I'm currently getting this error when I try to run the basic installation locally:
Uncaught TypeError: $ is not a function
at eval (es.array.index-of.js?c975:15)
at Object../node_modules/core-js/modules/es.array.index-of.js
That file is:
'use strict';
var $ = require('../internals/export');
var $indexOf = require('../internals/array-includes').indexOf;
var arrayMethodIsStrict = require('../internals/array-method-is-strict');
var arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');
var nativeIndexOf = [].indexOf;
var NEGATIVE_ZERO = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;
var STRICT_METHOD = arrayMethodIsStrict('indexOf');
var USES_TO_LENGTH = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });
// `Array.prototype.indexOf` method
// https://tc39.github.io/ecma262/#sec-array.prototype.indexof
$({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || !STRICT_METHOD || !USES_TO_LENGTH }, {
indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
return NEGATIVE_ZERO
// convert -0 to +0
? nativeIndexOf.apply(this, arguments) || 0
: $indexOf(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);
}
});
So far, I've tried updating core-js and NPM repeatedly with no luck.

Answer 1

core-js should not be compiled by Babel. When using webpack + babel to compile your code, you need to ensure that the webpack module rule for babel-loader excludes core-js.
Option 1
Tell webpack to not use babel-loader for any of the dependencies in your node_modules. Since core-js is a dependency in node_modules, this excludes core-js from being processed by babel.
// webpack.config.js
// This code snippet shows only the relevant part of the webpack config
module.exports = {
module: {
rules: [
{
test: /\.m?(j|t)sx?$/,
// Excluding node_modules means that core-js will not be compiled
exclude: /node_modules/,
use: ['babel-loader']
}
]
}
}
Option 2
Tell webpack to compile all dependencies with babel, except for the core-js dependency:
// webpack.config.js
// This code snippet shows only the relevant part of the webpack config
module.exports = {
module: {
rules: [
{
test: /\.m?(j|t)sx?$/,
// Compile all node_modules except core-js
include: {
and: [/node_modules/],
not: [/core-js/]
},
use: ['babel-loader']
}
]
}
}
Relevant Links
https://github.com/zloirock/core-js/issues/912
https://webpack.js.org/configuration/module/#ruleexclude
https://webpack.js.org/configuration/module/#ruleinclude
https://webpack.js.org/configuration/module/#rule-conditions