nodemon not working properly - node.js

Question

I am running my nodejs app by npm start
I just installed nodemon by
sudo npm install -g nodemon so that i can get my server restarted when i save changes to files.
But when i try to start the server, something like this
nodemon ./app.js localhost 3000 or nodemon start localhost 3000
I get this as output
LM-SJC-00871929:webapp gdeep$ nodemon ./app.js localhost 3000
28 May 23:34:30 - [nodemon] v1.1.1
28 May 23:34:30 - [nodemon] to restart at any time, enter `rs`
28 May 23:34:30 - [nodemon] watching: *.*
28 May 23:34:30 - [nodemon] starting `node ./app.js localhost 3000`
but when i go to my webpage, i get
Oops! Google Chrome could not connect to localhost:3000. What am i doing wrong?
App.js here http://collabedit.com/t35dy

Answer 1

You're running express 4, which has the app.listen call in a different file than app.js. The command you're looking for is nodemon bin/www (localhost and 3000 are not needed in this scenario).
In fact, you can even run nodemon with no args, and it'll read what command needs to be run from scripts.start in package.json (which express generates automatically).

Answer 2

Here's what I did to make nodemon update correctly:
nodemon index.js -L
The -L flag stands for legacyWatch, here's an explanation from the official doc:
In some networked environments (such as a container running nodemon reading across a mounted drive), you will need to use the legacyWatch: true which enables Chokidar's polling.
https://www.npmjs.com/package/nodemon#application-isnt-restarting

Answer 3

In my case, I had to install nodemon globally. Use this command to do so..
npm install -g nodemon
If you're using Linux you may need to prefix the command with the sudo keyword for administration access..
sudo npm install -g nodemon

Answer 4

try running nodemon ./app.js 3000 or nodemon start 3000

Answer 5

For Express.js 4,
use nodemon
or nodemon bin/www

Answer 6

Add following code in your code
app.js
app.listen(3000, function(){
console.log("info",'Server is running at port : ' + 3000);
});
package.json
nodemon app.js
Then run npm start from the command line.

Answer 7

npm i nodemon
Edit your Package.json file:- set start to nodemon:
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "nodemon server.js"
}
Run npm start to try the server

Answer 8

If you are using express4, the easiest way is to navigate to package.json and change
"scripts": {
"start": "node ./bin/www"
}
to
"scripts": {
"start": "nodemon ./bin/www"
}

Answer 9

For Express 4; Just run
nodemon
command (with out any args) on the directory; this works for me.

Answer 10

thanks
you need to type this after to enter in the folder application with
cd your_project_folder
sudo nodemon bin/www

Answer 11

Certain child processes related to your parent process may not be closed. Try to kill all the child processes.
Ref: https://github.com/remy/pstree

Answer 12

Use single quotation for multi-value args like `--exec'.
e.g. I changed "nodemon --exec yarn build-langs" to "nodemon --exec 'yarn build-langs'" and worked.

Answer 13

"scripts": {
"start": "nodemon app.js"
},
check it, if it's true or not

Answer 14

Try this:
First install nodemon by npm install nodemon or any command from the official website (https://www.npmjs.com/package/nodemon)
Then start your nodemon by npx nodemon filename.js
or if you have your package.json with you and the entry point is the file you would like to open then you can also go with the command npx nodemon
Check this once
Hope it works!!
Happy Coding 😀

Answer 15

You can directly use the command nodemon start to start your server.

Answer 16

Try this command on terminal if you are using Nodejs & TypeScript
npm i --dev nodemon ts-node

Answer 17

You might also run into the issue of having an empty .nodemonignore.

Answer 18

try
npm install --save-dev nodemon
and then
in
package.json file
keep like this
"scripts": {
"start": "nodemon",
"test": "echo \"Error: no test specified\" && exit 1"
},
instead of npx nodemon, which takes more time

Answer 19

First of all, uninstall nodemon:
npm uninstall nodemon
After uninstalling the nodemon then install nodemon globally using:
npm i -g nodemon
It will install nodemon globally then run the following command:
nodemon index.js or app.js