npm run build does not update the react components - node.js

Question

i have a react project with the following package.json :
{
"name": "commonsensev2.0",
"version": "0.1.0",
"private": true,
"homepage": "http://localhost:9080/server/react",
"dependencies": {
"all": "0.0.0",
"axios": "^0.18.0",
"babel-polyfill": "^6.26.0",
"chart.js": "^2.7.3",
"moment": "^2.23.0",
"node-sass-chokidar": "0.0.3",
"npm-run-all": "^4.1.5",
"popper.js": "^1.14.6",
"react": "^16.7.0",
"react-bootstrap": "^0.31.5",
"react-bootstrap-table": "^4.3.1",
"react-chartjs2": "^1.2.1",
"react-dom": "^16.7.0",
"react-localize-redux": "^2.17.5",
"react-moment": "^0.7.9",
"react-redux": "^5.1.1",
"react-router-dom": "^4.3.1",
"react-scripts": "1.0.14",
"redux": "^3.7.2"
},
"scripts": {
"build-css": "node-sass-chokidar src/sass/App.scss -o src/css/",
"watch-css": "npm run build-css && node-sass-chokidar src/sass/App.scss -o src/css/ --watch --recursive",
"start-js": "react-scripts start",
"start": "npm-run-all -p watch-css start-js",
"build": "npm run build-css && react-scripts build",
"postbuild": "((ROBOCOPY build ../react /MIR) ^& if %ERRORLEVEL% lss 8 set ERRORLEVEL = 0)",
"test": "react-scripts test --env=jsdom",
"eject": "react-scripts eject"
},
"devDependencies": {
"bootstrap-toggle": "^2.2.2",
"datatables.net": "^1.10.19",
"numeral": "^2.0.6"
}
}
when i do npm run build i cannot see the changes on the html pages, i m using node 8.11.1 i downgraded it because i found somewhere that it maybe the reason why it does not work i'm also using "node-sass-chokidar": "0.0.3"
and the backend is a java server

Answer 1

I had the same issue, I deleted the old build folder on my local environment and ran npm run build again to generate a new build folder.

Answer 2

Just a wild guess here but I think you are running the wrong command. Because build is typically when you want to build code for a purpose like putting it on a server.
What you need to do is to npm run start, as that has the watch, that watches for changes and updates.
Just a minor thing, I would rename the start script to dev or serve. Generally more used I would say.