Why Heroku don't find moment? - node.js

Question

i am creating a discord bot and hosting it on heroku. i installed the moment.js library but it can't find it giving the following error
2022-03-27T12:41:48.954612+00:00 app[worker.1]: Error: Cannot find module 'moment'
2022-03-27T12:41:48.954612+00:00 app[worker.1]: Require stack:
2022-03-27T12:41:48.954612+00:00 app[worker.1]: - /app/bot.js
2022-03-27T12:41:48.954622+00:00 app[worker.1]: at Function.Module._resolveFilename (node:internal/modules/cjs/loader:933:15)
2022-03-27T12:41:48.954625+00:00 app[worker.1]: at Function.Module._load (node:internal/modules/cjs/loader:778:27)
2022-03-27T12:41:48.954625+00:00 app[worker.1]: at Module.require (node:internal/modules/cjs/loader:1005:19)
2022-03-27T12:41:48.954626+00:00 app[worker.1]: at require (node:internal/modules/cjs/helpers:102:18)
2022-03-27T12:41:48.954626+00:00 app[worker.1]: at Object.<anonymous> (/app/bot.js:3:16)
2022-03-27T12:41:48.954626+00:00 app[worker.1]: at Module._compile (node:internal/modules/cjs/loader:1103:14)
2022-03-27T12:41:48.954626+00:00 app[worker.1]: at Object.Module._extensions..js (node:internal/modules/cjs/loader:1157:10)
2022-03-27T12:41:48.954627+00:00 app[worker.1]: at Module.load (node:internal/modules/cjs/loader:981:32)
2022-03-27T12:41:48.954627+00:00 app[worker.1]: at Function.Module._load (node:internal/modules/cjs/loader:822:12)
2022-03-27T12:41:48.954627+00:00 app[worker.1]: at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12) {
2022-03-27T12:41:48.954628+00:00 app[worker.1]: code: 'MODULE_NOT_FOUND',
2022-03-27T12:41:48.954628+00:00 app[worker.1]: requireStack: [ '/app/bot.js' ]
2022-03-27T12:41:48.954628+00:00 app[worker.1]: }
my code
const moment = require('moment');
how should i do?
package.json:
{
"name": "freaksland-bot",
"version": "1.0.0",
"description": "",
"main": "bot.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"#discordjs/voice": "^0.8.0",
"moment.js": "^2.29.1",
"discord.js": "^13.6.0",
"init": "^0.1.2"
}
}

Answer 1

You are depending on moment.js, but the correct package is just moment.
Did you manually add that to your package.json? First, remove that line.
Then add the correct package:
If you are using Yarn, run yarn add moment
If you are using NPM, run npm install moment
This should install the dependency locally and also add it to your package.json and the relevant lock file. Commit the changes to those files and redeploy.