I am using nodemon to watch the changes to the server files and restart the server. It works fine when the script is ec5
nodemon ./server.js
but I want to write the script in ec6 and compile using babel doing the same thing but building before the server is restarted.
package.json
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"build": "babel src --out-dir dist",
"serve": "npm run build && node dist/index.js",
"serve-dev": "nodemon dist/index.js"
},
"dependencies": {
"babel-preset-env": "^1.7.0",
"express": "^4.16.4"
},
"devDependencies": {
"#babel/cli": "^7.0.0-rc.1",
"#babel/core": "^7.0.0-rc.1",
"#babel/node": "^7.0.0-rc.1",
"#babel/preset-env": "^7.0.0-rc.1",
"nodemon": "^1.18.3"
}
Run with babel-node. (I can see it's already installed as dev dependency)
"serve-dev": "nodemon --exec babel-node src/index.js"
(assumed that src/index.js is your entry point of your app)
I think nodemon has built-in support for this now.
Create a config file: https://github.com/remy/nodemon#config-files
Watch for the restart event and put your build script stuff there: https://github.com/remy/nodemon#triggering-events-when-nodemon-state-changes
Related
I have my own nodejs web application which is using Parcel 2 to bundle the resources.
{
"name": "acme-web-app",
"version": "0.0.1",
"description": "",
"keywords": [],
"license": "",
"author": "",
"scripts": {
"build": "parcel build index.html",
"dev": "parcel index.html --open",
"start": "npm run build && npm run dev",
"test": "echo \"Error: no test specified\" && exit 1"
},
"devDependencies": {
"#parcel/packager-raw-url": "^2.6.0",
"#parcel/transformer-sass": "^2.6.0",
"#parcel/transformer-webmanifest": "^2.6.0",
"parcel": "^2.6.0",
"sass": "^1.52.2"
}
}
All works fine - the js bundles end up in a dist folder.
I am contemplating whether it is possible to write a parcel plug-in within this project is executed when the build script is run.
Is it possible - or does every reference need to go through npm channels via devDependencies?
I haven't figured a starting point for this - and have not been able to find what I am looking for on google so hopefully, the question makes sense.
NOTE: I have only really built web applications with nodejs.
I'm new to Nodejs, normally when I make a project, I install the dependencies myself, and in order to run the project set something like this in the packaje.json:
"scripts": {
"dev": "nodemon server.js"
}
and then I just run my project with something like this npm run dev
But in a project made by someone else it doesn't seem to be that simple because it has the dependencies like this:
{
"name": "proyecto API",
"version": "1.0.0",
"description": "proyecto Main Backend Repo",
"main": "index.js",
"type": "module",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "cross-env NODE_ENV=production node --harmony index.js",
"dev": "cross-env NODE_ENV=development nodemon --harmony index.js",
"lint": "eslint --ext .js --ignore-path .gitignore .",
"lint:fix": "eslint --ext .js . --fix",
"superuser": "node --harmony createSuperUser.js"
},
"repository": {
"type": "git",
"url": "git+https://github.com/proyecto-Network/lolagato"
},
"author": "gatito",
"license": "MIT",
"bugs": {
"url": "https://github.com/proyecto-Network/lolagato/issues"
},
"homepage": "https://github.com/proyecto-Network/lolagato/erths",
"dependencies": {
"#google-cloud/storage": "^5.14.2",
"cookie-parser": "^1.4.5",
"cors": "^2.8.5",
"express": "^4.17.1",
"jsonwebtoken": "^8.5.1",
"mongo-project": "^1.0.1",
"mongodb": "^4.1.0",
"morgan": "^1.10.0"
},
"devDependencies": {
"cross-env": "^7.0.3",
"nodemon": "^2.0.12"
}
}
Apparently here I can't just do npm run dev because as you can see in the packaje.json it comes out this:
"dev": "cross-env NODE_ENV=development nodemon --harmony index.js"
So my questions are, how can I run this project on my PC and what does that say "cross-env" and --harmony mean?
I have to install all that that appears in the packaje.json?
Just do,
npm install
This will install all the required dependencies. If you notice, in the devDependencies there is cross-env which is required for your npm run dev.
Once the dependencies are brought up, do npm run dev.
Or you could just do -
nodemon index.js
or
nodemon --harmony index.js
To see what happens.
cross-env NODE_ENV=development is just setting the environment variables. From their npm page -
cross-env makes it so you can have a single command without worrying about setting or using the environment variable properly for the platform.
I have a very basic Express server setup with NodeJS/Express + Nodemon. I'm using WebStorm as my IDE.
When running the debug/inspect script, my application is throwing a compile-time error. Following the instructions here, and cognizant of the post here, my (simplified) package.json looks like this:
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"dev": "nodemon src/app.ts",
"debug": "nodemon --inspect=127.0.0.1:9229 src/app.ts"
},
"devDependencies": {
"#types/express": "^4.17.9",
"#types/node": "^14.14.19",
"nodemon": "^2.0.6",
"ts-node": "^9.1.1",
"typescript": "^4.1.3"
}
When I run npm run debug I receive the following error:
I've also tried the following, all with the same result:
"debug": "nodemon --inspect src/app.ts"
"debug": "nodemon --inspect=0.0.0.0:9229 src/app.ts"
Any ideas why this error is occurring?
The command npm run dev does not generate an error. Upon further investigation, nodemon automatically substitutes ts-node when targeting a .ts file. Ts-node, in turn, recommends debugging by registering ts-node and running the server with the node command.
If you need to use advanced node.js CLI arguments (e.g. --inspect),
use them with node -r ts-node/register instead of the ts-node CLI.
You can modify your script as follows:
"debug": "nodemon --exec \"node --inspect-brk=0.0.0.0:9229 --require ts-node/register src/app.ts\""
to make sure that the --inspect-brk is passed to Node.js and not to ts-node
I am running my web app with npm start but now I need to deploy it to Digital Ocean which means that I'll have to use forever to start my app and I can't figure this out...
I tried to run it as forever npm start but it returns:
error: Cannot start forever
error: script /root/saleseng/OP Apps Platform/server/npm does not exist.
This is my scrips object from package.json:
"scripts": {
"start": "nodemon --watch src --exec babel-node -- src/index.js",
"test": "echo \"Error: no test specified\" && exit 1"
}
You will need to pass the name of .js file to forever:
forever start src/index.js
This will start the script with forever. It could be monitored with
forever logs scriptId -f
forever list will fetch you the scriptId
UPDATE:
Transpiling to ES5:
To use babel have the following dependencies installed:
"dependencies": {
"babel": "^6.23.0",
"babel-cli": "^6.24.1",
"babel-core": "^6.25.0",
"babel-polyfill": "^6.23.0",
"babel-preset-es2015": "^6.24.1",
"babel-preset-stage-0": "^6.24.1",
}
Then create a .babelrc in the root of your project having the following:
{
"presets": ["es2015","stage-0"]
}
Now to finally do a transpile, run:
babel myInputDirectory --out-dir myOutputDirectory
I'm trying to use ts-node with nodemon. Both are installed using yarn and my package.json has the following structure:
{
"name": "yarnTest",
"version": "1.0.0",
"main": "index.js",
"license": "MIT",
"devDependencies": {
"#types/express": "^4.0.36",
"bootstrap-sass": "^3.3.7",
"nodemon": "^1.11.0",
"typescript": "^2.4.1"
},
"dependencies": {
"#types/chalk": "^0.4.31",
"chalk": "^2.0.1",
"express": "^4.15.3",
"ts-node": "^3.2.0"
},
"scripts": {
"dev": "nodemon --exec 'ts-node --cache-directory .tscache' ./src/www.ts",
"start": "ts-node --fast ./dist/www.ts"
}
}
Now, when I use "yarn run dev", it executes nodemon and nodemon tries to execute "ts-node" but nodemon tells me that the command "ts-node" does not exist:
Der Befehl "'ts-node" ist entweder falsch geschrieben oder konnte nicht gefunden werden.
Yarn is installed globally but ts-node is installed for my project only.
I already tried:
"scripts": {
"dev": "nodemon --exec 'yarn run ts-node --cache-directory .tscache' ./src/www.ts",
"start": "ts-node --fast ./dist/www.ts"
}
But this gives me the error that "yarn" is not found :(
Any ideas how to fix this issue?
You should install ts-node first, run npm install -g ts-node
I finally solved the issue!
After some hours I figured out that nodemon told me, that it's unable to find "'ts-node" (or "'yarn"). The apostroph was confusing me, so I finally replaced both apostrophes in my package.json with " and now my working script command is the following one:
"dev": "nodemon --exec \"ts-node --cache-directory .tscache\" ./src/www.ts"
2020 Update
I am trying to run a typescript file with nodemon and following dev script in package.json is sufficient
{
"dev": "nodemon src/index.ts"
}
No need of including ts-node in the dev script.
I have ts-node and nodemon in dependencies