I have to make our website compatible for internet explorer, and it’s quite tricky, as the browser doesn’t understand es6 (arrow functions and the like). I’ve been trying to upgrade webpack and tweak the webpack and babel config to fit our needs. This works great for our own source files, but doesn’t in the node_modules folder. The syntax is not IE compatible if we don’t include it in our babel transpiling, but it also fails if we do transpile the specific node_modules folder that fails (a dependency within the webpack-hot-middleware dependency), giving an error of Uncaught Error: ES Modules may not assign module.exports or exports.*, Use ESM export syntax, instead. I’m hoping I just have the wrong babel or webpack settings here, but I've been scraping the interwebz for answers for a while but haven't quite found the solution yet.

I'm using webpack 5 and babel-loader. I have a .babelrc and a webpack.config.js file, here is a snippet from the latter while I try to transpile the failing node_module package:

module: {
    rules: [
        {
            test: /\.js$/,
            loader: 'babel-loader',
            exclude: [
                {
                    and: [/node_modules/],
                    not: [
                        path.resolve(
                            __dirname,
                            "node_modules/webpack-hot-middleware/node_modules/ansi-regex"
                        )
                    ]
                }
            ],
            options: {
                babelrc: false,
                presets: [
                    "@babel/preset-react",
                    ["@babel/preset-env", {
                    "corejs": { "version": 3 },
                    "useBuiltIns": "usage",
                    "targets": {
                        "edge": "17",
                        "firefox": "60",
                        "chrome": "67",
                        "safari": "11.1",
                        "ie": "10"
                    },
                }]],
                "plugins": [
                    "@babel/plugin-proposal-object-rest-spread",
                    "@babel/plugin-proposal-optional-chaining",
                    "@babel/plugin-proposal-nullish-coalescing-operator",
                    "@babel/plugin-transform-arrow-functions"
                ]
            }
        },
        [...]
    ]
}