app.js

const exp = require("constants");
const express = require("express");
const https = require("https");

const app = express();
const port = 3000;
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

app.listen(port, function () {
  console.log("Server is started at port " + port);
});

app.get("/", function (req, res) {
  res.sendFile(__dirname + "/index.html");
});

app.post("/", function (req, res) {
  let id = Number(req.body.pokemon);
  let url = "https://pokeapi.co/api/v2/pokemon/" + id;
  let pokeImg = "https://pokeres.bastionbot.org/images//" + id + ".png";

  https.get(url, function (response) {
    var responseData = "";

    response.on("data", function (dataChunk) {
      responseData += dataChunk;
    });

    response.on("end", function () {
      var pokeInfo = JSON.parse(responseData);
      var pokemonName = pokeInfo.name;
      var pokeType = pokeInfo.types[0].type.name;
      res.write(
        "<h1>Name of the pokemon you searched is " + pokemonName + "</h1>"
      );
      res.write("<img src=" + pokeImg + ">");
      res.write("<h3> The main type of the pokemon: " + pokeType);

      res.send();
    });
  });
});