I am completely new to Typescript, Node.js, and Express. Following the instructions outlined in this tutorial (https://www.digitalocean.com/community/tutorials/setting-up-a-node-project-with-typescript), I set up my project exactly as described there.
The code snippet I attempted to run, which I obtained from the provided link, looks like this:
import express from 'express';
const app = express();
const port = 3000;
app.get('/', (req, res) => {
res.send('The sedulous hyena ate the antelope!');
});
app.listen(port, err => {
if (err) {
return console.error(err);
}
return console.log(`server is listening on ${port}`);
});
Upon trying to execute this code using `npm start`, I encountered the following error message:
No overload matches this call. The last overload gave the following error. Argument of type '(err: any) => void' is not assignable to parameter of type '() => void'.ts(2769)After reading through the comments on the original post where I found this code, I came across a suggestion that switching the first line from `import express from 'express';` to `var express = require('express');` resolved the issue for someone else. I ended up having to explicitly define the types of `req`, `res`, and `err` as `any` to get it to work. Here is the revised code snippet that finally worked for me:
var express = require('express');
const app = express();
const port = 3000;
app.get('/', (req: any, res: any) => {
res.send('The sedulous hyena ate the antelope!');
});
app.listen(port, (err: any) => {
if (err) {
return console.error(err);
}
return console.log(`server is listening on ${port}`);
});