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JavaScript Express Basics Deeper into Routing with Express Review Adding Multiple Routes

Posted by William Ray Noble
William Ray Noble
22,190 Points

app.post is not a function error

Hello,

I've passed the first part of this challenge by create an app.post(), however, the second half of the challenge is telling me that app.post is not a function. I can't figure out what mistake I'm making that is generating this error. TIA

app.js 
const express = require('express');
const posts = require("./mock/posts.json");

const app = express();

app.get('/', (req, res) => {
  res.send("<h1>I Love Treehouse!</h1>");
});

app.post('/blog', (req, res) => {
  res.send(req.body);
});

app.listen(3000, () => {
  console.log("The frontend server is running on port 3000!")
});

1 Answer

Brandon White
.a{fill-rule:evenodd;}techdegree seal-36
Brandon White
Full Stack JavaScript Techdegree Graduate 34,660 Points

I’m not sure why you would get an error stating that app.post is not a function. This normally happens when you try to invoke a variable (or property) with parentheses when it’s not a function.

The reason you’re not passing the challenge though is because you’re sending back the wrong info. The challenge asks you to send back the posts object, which is the variable declared on the second line. You’re sending back the body of the request. Change that and you should pass the challenge.

William Ray Noble
William Ray Noble
22,190 Points

Thanks for response, no matter what I try I get the error app.post is not a function. I can't even make it past the first part of the challenge without receiving this error.

Brandon White
.a{fill-rule:evenodd;}techdegree seal-36
Brandon White
Full Stack JavaScript Techdegree Graduate 34,660 Points

In that case, change it to app.get. The challenge never actually asks for you to make a route for a post request, but you’ll find later in your programming that express().post is valid syntax (when you want to post to a route).

That said, if the challenge won’t allow for you to use app.post, then use app.get.