How to run server only after webpack completes bundling bundles? - javascript

"scripts": {
"start": "node server.js",
"build": "webpack"
},
how to run npm run build first and then npm start in a single command?
"scripts": {
"start": "node server.js",
"build": "webpack",
"start-dev" : "npm run build && npm run start"
},
I tried the command npm run start-dev. But only webpack is being compiled. The server isn't running.

I don't know why that doesn't work, but, anyway, you can try this:
"scripts": {
"start": "node server.js",
"build": "webpack",
"start-dev" : "webpack && node server.js"
}

npm i npm-run-all
this package never run into issue. You can add as many as commands
"dev:start": "npm-run-all build start",

Related

Next.js app will not auto refresh to show changes in the browser even though im running npm run dev

I want to see any updates i make to my code reflected in the browser. In VSC terminal I run "npm run dev". If i make changes to the code nothing happens unless i CTRL + C and run "npm run dev" again.
I have tried running it in Chrome (instead of Brave)
I have tried:
npm run build
npm start
I have tried:
"scripts": {
"test": "jest",
"dev": " next dev -p 8000",
"build": "next build",
"start": "next start",
}
I have tried:
"scripts": {
"test": "jest",
"dev": " next dev -p 8888",
"build": "next build",
"start": "next start",
}
im wondering if it has to do with the way ive organized my project
below is my project's directory organization:
v components
v web3
Connected.js
NotConncted.js
Web3Button.js
DashboardSidebar.js
>node_modules
>pages
>api
_app.js
index.js
...etc

How to run "npm start" run forever

when the status is online i am running the port on 8014 its still not running
when i use pm2 start tools/srcServer.js
"scripts": {
"prestart": "babel-node tools/startMessage.js",
"start": "npm-run-all --parallel test:watch open:src",
"open:src": "babel-node tools/srcServer.js",
"test": "mocha --reporter progress tools/testSetup.js \"src/**/*.test.js\"",
"test:watch": "npm run test -- --watch",
"clean-dist": "npm run remove-dist && mkdir dist",
"remove-dist": "node_modules/.bin/rimraf ./dist",
"build:html": "babel-node tools/buildHtml.js",
"prebuild": "npm-run-all clean-dist test build:html",
"build": "babel-node tools/build.js",
"postbuild": "babel-node tools/distServer.js"
}
I am running the node with npm start I need to run the node to run run the server forever.
I tried using the command "forever start -c "npm start" ./" its not showing
To run npm start from pm2 you can run pm2 start npm -- start. This will run any command that is written within package.json start section.
Why don't you try to use PM2 (Node process manager: http://pm2.keymetrics.io/)?

npm build not failing properly

My package.json
"scripts": {
"lint": "eslint src tools test",
"test": "npm run lint && mocha --compilers js:babel/register",
"clean": "babel-node --eval \"require('./tools/clean')().catch(err => console.error(err.stack))\"",
"build": "babel-node --eval \"require('./tools/build')().catch(err => console.error(err.stack))\"",
"start": "babel-node --eval \"require('./tools/start')().catch(err => console.error(err.stack))\"",
"deploy": "babel-node --eval \"require('./tools/deploy')().catch(err => console.error(err.stack))\""
}
When I do
npm run build
having syntax error in any file of the application. I can see the console error output in console but the build itself returns exit code 0. How can I fail the whole build?
(throw - not working)

How to use nodemon in npm scripts to build and start scripts?

"scripts": {
"build": "babel src -d lib",
"start": "node --use_strict ./lib/index.js",
"watch": "nodemon lib/index.js --exec npm run build"
}
Using the command npm run watch results in the following wrong command being run: [nodemon] starting "npm lib/index.js run build"
How would I write a nodemon command that, on reload, transpiles the code using babel and reloads the code?
"scripts": {
"build": "babel src -d lib",
"start": "node --use_strict ./lib/index.js",
"watch": "nodemon --exec \"npm run build && node lib/index.js\" -e js --ignore lib/"
}
Then run npm run watch. After this, nodemon will rebuild the project and then restart the server every time source code(.js files) is modified.
--exec specifies what non-node scripts (also works for node scripts as above node lib/index.js) you want nodemon to execute when there is a file change.
-e specifies what file extensions you want nodemon to watch.
--ignore specifies the files/directories you want nodemon to ignore. This option is essential to solve this problem because if you do not specify to ignore this lib/ folder, nodemon will restart infinitely as the compiled files in lib/ are also .js files.
You could simply run your code with babel-node to avoid explicit transpiling.
$ nodemon lib/index.js --exec babel-node --presets=es2015,stage-2
It seems like this is the recommended way to use nodemon with babel.
Please note, running --exec could have unintended side effects when running your development environment remotely of your localhost
You can have two nodemons, one to transpile and the other to run your code. In package.json you can do something like this:
"scripts": {
"serve": "nodemon --watch dist/ ./dist/index.js",
"build" : "nodemon --watch src/ --exec babel ./src --out-dir ./dist --source-maps --copy-files"
},
There is an option to build files with Babel in "watch" mode, let Nodemon monitor just the "build" folder and restart the app upon changes to the compiled output.
{
"name": "app",
"version": "1.0.0",
"private": true,
"dependencies": {},
"devDependencies": {
"#babel/cli": "^7.6.0",
"#babel/core": "^7.6.0",
"#babel/preset-env": "^7.6.0",
"nodemon": "^1.19.2"
},
"scripts": {
"build": "babel src --out-dir build --source-maps=inline --verbose",
"start": "yarn build --watch & sleep 1 && nodemon --watch build build/index.js"
}
}
This example is taken from GraphQL API Examples repository on GitHub.
"scripts": {
"build": "babel src -d lib",
"start": "nodemon --exec babel-node lib/index.js",
"serve": "npm run build && node lib/index.js"
}
Serve is for production, with npm start what you do is transpile first and then run nodemon.
A better option would be to not use a global install but instead use the package installed locally. This will also help for automation builds that might be setup the same as your local machine per 12 factor app design.
"scripts": {
"watch": "node ./node_modules/nodemon/bin/nodemon.js"
}

How do I add a custom script to my package.json file that runs a javascript file?

I want to be able to execute the command script1 in a project directory that will run node script1.js.
script1.js is a file in the same directory. The command needs to be specific to the project directory, meaning that if I send someone else the project folder, they will be able to run the same command.
So far I've tried adding:
"scripts": {
"script1": "node script1.js"
}
to my package.json file but when I try running script1 I get the following output:
zsh: command not found: script1
Does anyone know the steps necessary to add the script mentioned above to the project folder?
*Note: the command can not be added to the bash profile (cannot be a machine specific command)
Please let me know if you need any clarification.
Custom Scripts
npm run-script <custom_script_name>
or
npm run <custom_script_name>
In your example, you would want to run npm run-script script1 or npm run script1.
See https://docs.npmjs.com/cli/run-script
Lifecycle Scripts
Node also allows you to run custom scripts for certain lifecycle events, like after npm install is run. These can be found here.
For example:
"scripts": {
"postinstall": "electron-rebuild",
},
This would run electron-rebuild after a npm install command.
I have created the following, and it's working on my system. Please try this:
package.json:
{
"name": "test app",
"version": "1.0.0",
"scripts": {
"start": "node script1.js"
}
}
script1.js:
console.log('testing')
From your command line run the following command:
npm start
Additional use case
My package.json file has generally the following scripts, which enable me to watch my files for typescript, sass compilations and running a server as well.
"scripts": {
"start": "concurrently \"sass --watch ./style/sass:./style/css\" \"npm run tsc:w\" \"npm run lite\" ",
"tsc": "tsc",
"tsc:w": "tsc -w",
"lite": "lite-server",
"typings": "typings",
"postinstall": "typings install"
}
Steps are below:
In package.json add:
"bin":{
"script1": "bin/script1.js"
}
Create a bin folder in the project directory and add file runScript1.js with the code:
#! /usr/bin/env node
var shell = require("shelljs");
shell.exec("node step1script.js");
Run npm install shelljs in terminal
Run npm link in terminal
From terminal you can now run script1 which will run node script1.js
Reference: http://blog.npmjs.org/post/118810260230/building-a-simple-command-line-tool-with-npm
Lets say in scripts you want to run 2 commands with a single command:
"scripts":{
"start":"any command",
"singleCommandToRunTwoCommand":"some command here && npm start"
}
Now go to your terminal and run there npm run singleCommandToRunTwoCommand.
Suppose I have this line of scripts in my "package.json"
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"export_advertisements": "node export.js advertisements",
"export_homedata": "node export.js homedata",
"export_customdata": "node export.js customdata",
"export_rooms": "node export.js rooms"
},
Now to run the script "export_advertisements", I will simply go to the terminal and type
npm run export_advertisements
Example:
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build --prod",
"build_c": "ng build --prod && del \"../../server/front-end/*.*\" /s /q & xcopy /s dist \"../../server/front-end\"",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
As you can see, the script "build_c" is building the angular application, then deletes all old files from a directory, then finally copies the result build files.

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