What's wrong with this ReactRouter.match() implementation?

Question

I\'m trying to serve up React from my server via express.

The error I\'m getting, though, when I hit localhost:3000 is:

TypeError: (0 , _reactRouter.         


        

Answer 1

Your code looks correct if you used react router prior to v4, but react-router v4 has breaking changes throughout the codebase, including the method for server rendering. In v4, there is a new component specifically for server rendering - StaticRouter.

Your code should looks something like this with v4:

import path from "path";
import { Server } from "http";
import Express from "express";
import React from "react";
import { renderToString } from "react-dom/server";
import { StaticRouter } from "react-router";
import App from "./app";
import NotFoundPage from "./components/NotFoundPage";

// Initialize the express server, and tell it to use ejs
const app = new Express();
const server = new Server(app);
app.set("view engine", "ejs");
app.set("views", path.join(__dirname, "views"));

// Tell express where the static assets are
app.use(Express.static(path.join(__dirname, "static")));

app.get("*", (req, res) => {
  // This context object contains the results of the render
  const context = {};

  const html = renderToString(
    
      
    
  );
  res.status(200).send(html);
});

const port = process.env.PORT || 3000;
const env = process.env.NODE_ENV || "production";
server.listen(port, err => {
  if (err) {
    return console.error(err);
  }
  console.info(`Server running on http://localhost:${port} [${env}]`);
});

Here is a really nice annotated article by EbayTech showing how to set up an app with StaticRouter(for server) and BrowserRouter(for client)