I haven"t studied webpack for a long time. Recently, I began to learn the latest version of webpack when I was free. Webpack4, followed the steps of the official website step by step, but I made a mistake and asked for an explanation.
after installing some necessary modules, I installed jquery,package.json as follows:

{
  "name": "vuetest",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "sideEffects": false,
  "scripts": {
    "build": "webpack --config webpack.prod.js",
    "start": "webpack-dev-server --open --config webpack.dev.js"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "clean-webpack-plugin": "^0.1.19",
    "html-webpack-plugin": "^3.2.0",
    "webpack": "^4.16.5",
    "webpack-cli": "^3.1.0"
  },
  "dependencies": {
    "jQuery": "^1.7.4"
  }
}

webpack.config,js is configured as follows:

const path = require("path");
const webpack = require("webpack");
const CleanWebpackPlugin = require("clean-webpack-plugin");
const HTMLWebpackPlugin = require("html-webpack-plugin");

module.exports = {
    mode: "development",
    entry: {
        index: "./src/index.js"
    },
    output: {
        filename: "[name].bundle.js",
        path: path.resolve(__dirname, "dist")
    },
    plugins: [
        new HTMLWebpackPlugin({
            template: "index.html",
            title: "Code Splitting"
        }),
        new CleanWebpackPlugin(["dist"]),
    ]
};

next I use jquery"s index,js, as follows:

import _ from "lodash";
import { cube } from "./math.js";
const $ = require("jQuery");

console.log($)

if(process.env.NODE_ENV) {
    console.log(process.env.NODE_ENV);
}

function component() {
    var element = document.createElement("pre");
    var element2 = _.join(["Hello", "webpack"], " ");
    console.log("a" + element2)

    element.innerHTML = [
        "Hello webpack!",
        "5 cubed is equal to " + cube(5)
    ].join("\n\n");

    return element;
}

document.body.appendChild(component());

I execute webpack, in the console and report an error. I don"t understand what the problem is. Please solve it (I even deleted all the modules, re-downloaded, uninstalled node.js, and reinstalled, all this mistake)