How to route all requests to index.html with Node Express?

To route all requests to index.html with Node Express, we call the sendFile method.

For instance, we write

const express = require("express");
const server = express();

server.use("/public", express.static(__dirname + "/static-files-dir"));

server.get("/some-route", (req, res) => {
  res.send("ok");
});

server.get("/*", (req, res) => {
  res.sendFile(__dirname + "/index.html");
});

const port = 8000;
server.listen(port, () => {
  console.log("server listening on port " + port);
});

to create a catch route by calling server.get with '.*'.

And then we call sendFile with the path of index.html to render that as the response.