module.exports = {
 module: {
 rules: [
 {
 test: /\.css$/i,
 use: [
 {
 loader: "style-loader",
 options: {
 injectType: "styleTag",
 styleTagTransform (css, style) {
 // Do something ...
 style.innerHTML = `${css}.modify{}\n`;
 document.head.appendChild(style);
 },
 },
 },
 "css-loader",
 ],
 },
 ],
 },
};

function insert(css, style) {
 const parent = options.target || document.head;
 parent.appendChild(element);
}
module.exports = insert;

module.exports = {
 module: {
 rules: [
 {
 test: /\.css$/i,
 use: [
 {
 loader: "style-loader",
 options: {
 insert: require.resolve("./insert.js"),
 },
 },
 "css-loader",
 ],
 },
 ],
 },
};

module.exports = {
 module: {
 rules: [
 {
 test: /\.css$/i,
 use: [
 {
 loader: "style-loader",
 options: {
 injectType: "styleTag",
 styleTagTransform (css, style) {
 // Do something ...
 style.innerHTML = `${css}.modify{}\n`;
 document.head.appendChild(style);
 },
 },
 },
 "css-loader",
 ],
 },
 ],
 },
};

function styleTagTransform(css, style) {
 // Do something ...
 style.innerHTML = `${css}.modify{}\n`;
 document.head.appendChild(style);
}
module.exports = styleTagTransform;

module.exports = {
 module: {
 rules: [
 {
 test: /\.css$/i,
 use: [
 {
 loader: "style-loader",
 options: {
 styleTagTransform: require.resolve("./style-tag-transform-function.js"),
 },
 },
 "css-loader",
 ],
 },
 ],
 },
};