Webpack 4: Module parse failed: Unexpected token - reactjs

Question

During my builds, webpack is giving me this error:
ERROR in ./client/components/App/index.tsx 15:9
Module parse failed: Unexpected token (15:9)
You may need an appropriate loader to handle this file type.
|
|
> const App: SFC = () => (
| <div style={{ background: "red" }}>
| <h3>test</h3>
# ./client/index.tsx 11:4-14:6 12:24-51
# multi react-hot-loader/patch ./client/index.tsx webpack-hot-middleware/client?path=/__webpack_hmr&timeout=20000&reload=true
Here is my webpack.config.ts:
import CleanWebpackPlugin from "clean-webpack-plugin";
import HtmlWebpackPlugin from "html-webpack-plugin";
import path from "path";
import { Configuration, HotModuleReplacementPlugin } from "webpack";
const rootDir = ["..", "..", "..", ".."];
const distDir = ["..", ".."];
// this file lives in one place as `.ts` and another as `.js` grab the
// file extension to determine the include path relative to its location
const include =
path.extname(module.id) === ".ts"
? path.resolve(__dirname, "client", "index.tsx")
: path.resolve(__dirname, ...rootDir, "client", "index.tsx");
const exclude = /node_modules/;
const tsconfig = path.resolve(
__dirname,
...rootDir,
"config",
"tsconfig.client.json"
);
// development plugins
const plugins = [
new HotModuleReplacementPlugin(),
new HtmlWebpackPlugin({
template: path.resolve(__dirname, "..", "..", "..", "index.html")
}),
new CleanWebpackPlugin([path.resolve(__dirname, ...distDir, "*.*")], {
allowExternal: true,
root: __dirname,
verbose: true
})
];
// script for webpack-hot-middleware
const hotMiddlewareScript: string =
"webpack-hot-middleware/client?path=/__webpack_hmr&timeout=20000&reload=true";
const webpackDevConfig: Configuration = {
context: path.resolve(__dirname, ...rootDir),
devtool: "source-map",
entry: {
app: ["react-hot-loader/patch", include, hotMiddlewareScript]
},
mode: "development",
module: {
rules: [
{
exclude,
include,
test: /\.css$/,
use: ["style-loader", "css-loader"]
},
{
exclude,
include,
loader: "ts-loader",
options: {
configFile: tsconfig,
transpileOnly: true
},
test: /\.tsx?$/
},
{
enforce: "pre",
exclude,
include,
loader: "source-map-loader",
test: /\.js$/
}
]
},
optimization: {
nodeEnv: "development"
},
output: {
filename: "[name].bundle.js",
path: path.join(__dirname, ...distDir),
publicPath: path.join(__dirname, ...distDir, "static/")
},
plugins,
resolve: {
extensions: [".js", ".ts", ".tsx", "*"]
},
target: "web"
};
export default webpackDevConfig;
My App.tsx:
import React, { SFC } from "react";
import ReactDOM from "react-dom";
const App: SFC = () => (
<div style={{ background: "red" }}>
<h3>test</h3>
</div>
);
My index.tsx:
import React from "react";
import ReactDOM from "react-dom";
import { App } from "./components";
ReactDOM.render(<App />, document.getElementById("app"));
// enables Hot Module Replacement (HMR)
if ((module as any).hot) {
(module as any).hot.accept("./components/App", () => {
// for HMR to work, `App` must be re-required
const NextApp = require("./components/App").default;
ReactDOM.render(<NextApp />, document.getElementById("app"));
});
}
My tsconfig.json:
{
"compilerOptions": {
"allowJs": true,
"jsx": "react",
"module": "commonjs",
...
}
}
The error itself seems to give the solution: You may need an appropriate loader to handle this file type., however, it is my understanding that ts-loader should be able to handle react.
Here is an example webpack.config provided by the ts-loader team used in an app that uses typescript and react. The set up is fairly similar to my own, however, I do not use webpack-dev-server, rather, I use webpack-dev-middleware.

Answer 1

The issue was resolved by niba's comment on the original question. It seems that ts-loader when given a single module to include will not traverse the linked modules. Removing the include field or using the folder name fixed this error for me.