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Jesse Thompson
Jesse Thompson
10,684 Points

fetch() doesnt work on nested address

I have this react function that works on my main domain http://localhost:3000/ But when I run the method on http://localhost:3000/watch/ it gives me this

"App.js:604 POST http://localhost:3000/watch/users/searchusers 404 (Not Found)" "SyntaxError: Unexpected token < in JSON at position 0 at App.js:617"

Seems the express app will only allow this to work at the main domain. How can I change this without redirecting on my /watch/ page?

// react method
fetchusers(e) {
        let searchusers = document.getElementById('usersearch').value;
        if (searchusers) {
            fetch('users/searchusers', {
                method: "POST",
                headers: {
                    'Accept': 'application/json',
                    'Content-Type': 'application/json'
                credentials: 'same-origin',
                body: JSON.stringify({
            .then(function(response) {
                // You parse the data into a useable format using `.json()`
                return response.json();
            .then(function(data) {
                // `data` is the parsed version of the JSON returned from the above endpoint.
                console.log(data);  // { "userId": 1, "id": 1, "title": "...", "body": "..." }
            .catch(error => { console.log(error);});

// express route
router.post('/searchusers', (req, res, next) => {
    if (!req.body.searchusers) {
        res.json({querystatus: 'empty friend search query'});
    } else {
        // the following makes a query to the database for users matching the user search input and only returns the username and id.
        User.find({username: new RegExp(req.body.searchusers) }, {username: 1} , function(err, result) {
            if (err) throw err;
            console.log(result + ' these are results')

2 Answers

Emma Willmann
.a{fill-rule:evenodd;}techdegree seal-36
Emma Willmann
Treehouse Project Reviewer

My first thought I agree with what Adam Beer said. With your current url wrapped in quotes, the fetch is looking for that exact wording (users/searchusers) in the path . If that should actually be 'users/' with a user id after the slash, then you should use a template literal. Wrap the url in back ticks and then the searchusers inside curly braces with a $ in front of it. If searchusers === 123, then the url it fetches would be 'users/123'.

Jesse Thompson
Jesse Thompson
10,684 Points

Not sure if you meant typing this: fetch(users/${searchusers} , {

I think you misunderstood what I meant, no big deal but it wasnt an issue of appending the json info the address, its a put request. it was that it was making a request for http://localhost:3000/watch/users/searchusers since I was on page http://localhost:3000/watch/ but I needed http://localhost:3000/users/searchusers.

But I ended up to putting the dev and production environments into a variable and switching as needed.

fetch(currentrooturl + 'users/searchusers',

Adam Beer
Adam Beer
11,314 Points

Just a tip, but what happend if you modify this section