Develop Reference

How to auto-reload the script by npm server

I am testing the sample code of javascript.
There is script like simple.js under demos directory.
I run demo by this command yarn build-demos && http-server demos/
simple.js is compiled to simple_bundle.js and server works.
However everytime I change simple.js, I need to restart server.
Is there any good short cut for this purpose??
I am not familiar with npm and webpack
Any help is appreciated.
My package.json is here below:
{
"name": "#magenta/sketch",
"version": "0.2.0",
"description": "Make sketches in the browser with machine learning.",
"main": "es5/index.js",
"types": "es5/index.d.ts",
"jsdelivr": "dist/magentasketch.js",
"unpkg": "dist/magentasketch.js",
"dependencies": {
"#tensorflow/tfjs": "^1.0.2"
},
"devDependencies": {
"#types/clone": "^0.1.30",
"#types/file-saver": "^1.3.0",
"#types/ndarray": "^1.0.6",
"#types/node": "^12.0.1",
"#types/tape": "^4.2.32",
"browserify": "^16.5.1",
"clang-format": "^1.2.3",
"clone": "^1.0.4",
"file-saver": "^1.3.8",
"file-saver-typescript": "^1.0.1",
"fs": "0.0.1-security",
"http-server": "^0.12.1",
"in-publish": "^2.0.0",
"minimist": "^1.2.5",
"path": "^0.12.7",
"tape": "^4.9.0",
"ts-loader": "^5.3.0",
"ts-node": "^5.0.1",
"tsify": "^3.0.4",
"tslint": "^5.9.1",
"typedoc": "^0.16.9",
"typedoc-plugin-sourcefile-url": "^1.0.3",
"typescript": "^3.3.3333",
"webpack": "^4.24.0",
"webpack-cli": "^3.1.2",
"webpack-dev-server": "^3.1.14"
},
"scripts": {
"prepublish": "yarn lint && yarn build && yarn bundle",
"build": "tsc",
"bundle": "webpack --config ./webpack/lib.config.ts",
"lint": "tslint -c ../tslint.json -p . -t verbose",
"test": "ts-node node_modules/tape/bin/tape src/**/*_test.ts",
"build-demos": "webpack --config ./webpack/demo.config.ts",
"run-demos": "yarn build-demos && http-server demos/",
"serve-demos": "http-server demos/",
"serve-dist": "http-server dist/",
"docs": "sh ../scripts/generate-docs.sh 'sketch'"
},
"author": "Magenta",
"license": "Apache-2.0",
"repository": {
"type": "git",
"url": "https://github.com/tensorflow/magenta-js.git"
}
}

You might need to use Nodemon.
You install nodemon by npm i nodemon
In package.json you add a script: "dev": "nodemon dist/index.js"
Execute the code in the console by adding npm run dev
It should work as you want

You may consider using Nodemon.

Nuxt PWA with directory errors

After a while without playing with Nuxtjs today I decided to start a project on it with PWA support, everything installed and the template created almost as usual, just missing a relatively useless directory - assets -, but when I go to `yarn dev` several of these errors appear:
ERROR ENOENT: no such file or directory, open '/home/runner/anisite/node_modules/.cache/pwa/icon/iphonexsmax_1242x2688.png'
then at the end it appears:
Killed
error Command failed with exit code 137
My package.json
{
"name": "anisite",
"version": "1.0.0",
"private": true,
"scripts": {
"dev": "nuxt",
"build": "nuxt build",
"start": "nuxt start",
"generate": "nuxt generate",
"lint:js": "eslint --ext \".js,.vue\" --ignore-path .gitignore .",
"lint": "yarn lint:js",
"test": "jest"
},
"dependencies": {
"#nuxtjs/axios": "^5.13.6",
"#nuxtjs/pwa": "^3.3.5",
"core-js": "^3.15.1",
"nuxt": "^2.15.7"
},
"devDependencies": {
"#babel/eslint-parser": "^7.14.7",
"#nuxtjs/eslint-config": "^6.0.1",
"#nuxtjs/eslint-module": "^3.0.2",
"#nuxtjs/tailwindcss": "^4.2.0",
"#vue/test-utils": "^1.2.1",
"babel-core": "7.0.0-bridge.0",
"babel-jest": "^27.0.5",
"eslint": "^7.29.0",
"eslint-config-prettier": "^8.3.0",
"eslint-plugin-nuxt": "^2.0.0",
"eslint-plugin-vue": "^7.12.1",
"jest": "^27.0.5",
"postcss": "^8.3.5",
"prettier": "^2.3.2",
"vue-jest": "^3.0.4"
}
}
Edits:
I already deleted the cache directories
I already reinstalled everything

Error on running a Next.js build : Cannot find module 'prop-types'

I am trying to run a Next.js build (using npx next start) but I am getting this error :
Error: Cannot find module 'prop-types' (screenshot below)
Can anyone help please ?
PS : I already did a npm install --save prop-types before the build.
Thank you.
Here is my package.json
"name": "psy-website",
"version": "0.1.0",
"private": true,
"scripts": {
"dev": "next dev -p 3001",
"build": "next build",
"start": "next start",
"lint": "next lint"
},
"dependencies": {
"next": "11.0.1",
"prop-types": "^15.7.2",
"react": "^17.0.2",
"react-anchor-link-smooth-scroll": "^1.0.12",
"react-dom": "^17.0.2",
"react-slick": "^0.28.1",
"react-spinners": "^0.11.0"
},
"devDependencies": {
"autoprefixer": "^10.3.1",
"eslint": "7.32.0",
"eslint-config-next": "11.0.1",
"postcss": "^8.3.6",
"tailwindcss": "^2.2.7"
}
}

Jest not finding all tests

Jest is not finding all of my test files. It is ignoring a directory. When I run npm run jest:watch my tests in ./server and its subdirectories are tested but no tests are found in ./client
What I have tried
I have tried creating a generic test file and moving it around. I found it would work in the following circumstances.
I have also tried using a direct path to the file - which didn't work.
Possible causes
I think it may be something to do with the unusual directory structure I have
./client
./server
as opposed to
./server.js
./other server files..
./client/...client files
or it may be die to me trying to run jest from the node.js app and also have it look at files in the client directory (which contains an app written in React) - I don't care about running tests on react components (only modules). Alternatively it could be something to do with jest in the client directory messing things up.
filename
./server/middleware
./
./client
delete.test.js
found by jest
found by jest
not found
My setup
my folder structure looks like this
./
./client (react client app)
./client/package.json
./client/node_modules
package.json
node.modules
./server (node.js api app)
./server/package.json
my jest is running from the ./package.json file.
Other things I have tried
I have tried using direct paths for my file the below code works
"testMatch": ["<rootDir>/server/delete.test.js"],
but this code (in the folder I want) does not
"testMatch": ["<rootDir>/client/delete.test.js"],
code setup
./package.json
{
"name": "Infoshot",
"version": "0.0.4",
"description": "Research Tool",
"main": "cd ./server && server.js",
"scripts": {
"start": "cd ./server && node server.js",
"server": "cd ./server && nodemon server.js",
"client": "npm start --prefix ./client/",
"clientinstall": "npm install --prefix client",
"dev": "concurrently \"npm run server\" \"npm run client\"",
"heroku-postbuild": "cd ./client && NPM_CONFIG_PRODUCTION=false npm install && CI= npm run build",
"compile-saas": "node-sass ./client/src/scss/a_main.scss ./server/nodeClient/public/css/main.css -w",
"test": "jest",
"test:watch": "npm run test -- --watch"
},
"jest": {
"testEnvironment": "node",
"testPathIgnorePatterns": [
"./node_modules"
]
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"axios": "^0.21.0",
"bcryptjs": "^2.4.3",
"config": "^3.2.2",
"dotenv": "^8.2.0",
"ejs": "^3.1.5",
"enzyme": "^3.11.0",
"express": "^4.17.1",
"express-validator": "^6.2.0",
"ijavascript": "^5.2.0",
"jest": "^26.6.3",
"jsonwebtoken": "^8.5.1",
"mongoose": "^5.7.0",
"nodemailer": "^6.4.14",
"nodemailer-sendgrid": "^1.0.3"
},
"devDependencies": {
"concurrently": "^4.1.2",
"node-sass": "^5.0.0",
"nodemon": "^1.19.2"
}
}
delete.test.json
describe.only('DELETE TEST: getDocument', () => {
test('Say Hi', async () => {
const bum = 'bum';
expect(bum).toBe(bum);
});
});
./client/package.json
As I said earlier I don't think this is relavant as it is not be run as I am running jest from ./server with npm run jest:watch
{
"name": "client",
"version": "0.1.0",
"private": true,
"dependencies": {
"axios": "^0.19.0",
"config": "^3.3.2",
"dotenv": "^8.2.0",
"enzyme-adapter-react-16": "^1.15.3",
"node-sass": "^4.14.1",
"react": "^16.9.0",
"react-beautiful-dnd": "^13.0.0",
"react-dom": "^16.9.0",
"react-router-dom": "^5.0.1",
"react-scripts": "^3.4.4",
"react-transition-group": "^4.3.0",
"serve": "^11.3.2",
"styled-components": "^5.1.1",
"uuid": "^3.3.3"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject",
"previewProd": "react-scripts build && serve"
},
"jest": {
"collectCoverageFrom": [
"src/components/documentEditor/*.js",
"<rootDir>/server/",
"!<rootDir>/node_modules/",
"!<rootDir>/src/index.js",
"!<rootDir>/src/registerServiceWorker.js"
]
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"proxy": "http://localhost:5000",
"devDependencies": {
"#testing-library/react": "^10.4.9"
}
}

I found that if I removed all the mentions of jest in the ./client/package.json and also replaced the ./package.json with
"collectCoverageFrom": [
"**/*.{js,jsx}",
"!**/node_modules/**"
]
it worked.

npm Error on build script in package.json "Syntax of the command is incorrect"

I recently tried to set up a react app while following a YouTube tutorial.
I've looked through other articles but cannot find exactly what the problem is with my syntax. Here is an image of my the various folders and files that make up the project
webpack -d && copy src/index.html dist/index.html && webpack-dev-server --content-base src/ --inline"
Here's my package.json file
{
"name": "reactenv",
"version": "1.0.0",
"description": "React Enviroment",
"main": "index.js",
"scripts": {
"start": "npm run build",
"build": "webpack -d && copy src/index.html dist/index.html && webpack-dev-server --content-base src/ --inline",
"build:prod": "webpack -p && copy src/index.html dist/index.html"
},
"keywords": [
"reactjs"
],
"author": "Lee Warner",
"license": "ISC",
"dependencies": {
"react": "^16.12.0",
"react-dom": "^16.12.0"
},
"devDependencies": {
"babel-loader": "^8.0.6",
"babel-preset-es2016": "^6.24.1",
"babel-preset-react": "^6.24.1",
"babel-preset-stage-2": "^6.24.1",
"webpack": "^4.41.2",
"webpack-cli": "^3.3.10",
"webpack-dev-server": "^3.9.0"
}
}