npm start - npm ERR! missing script: start - node.js

Question

I'm receiving this error when trying to my node application using the npm start command.
WhenIi try to npm start I get this error.
Error:
0 info it worked if it ends with ok
1 verbose cli [ 'C:\\Program Files\\nodejs\\node.exe',
1 verbose cli 'C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli 'start' ]
2 info using npm#5.6.0
3 info using node#v8.10.0
4 verbose stack Error: missing script: start
4 verbose stack at run (C:\Program Files\nodejs\node_modules\npm\lib\run-script.js:151:19)
4 verbose stack at C:\Program Files\nodejs\node_modules\npm\lib\run-script.js:61:5
4 verbose stack at C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:115:5
4 verbose stack at C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:402:5
4 verbose stack at checkBinReferences_ (C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:357:45)
4 verbose stack at final (C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:400:3)
4 verbose stack at then (C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:160:5)
4 verbose stack at ReadFileContext.<anonymous> (C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:332:20)
4 verbose stack at ReadFileContext.callback (C:\Program Files\nodejs\node_modules\npm\node_modules\graceful-fs\graceful-fs.js:78:16)
4 verbose stack at FSReqWrap.readFileAfterOpen [as oncomplete] (fs.js:420:13)
5 verbose cwd B:\tut\starter
6 verbose Windows_NT 6.1.7601
7 verbose argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "start"
8 verbose node v8.10.0
9 verbose npm v5.6.0
10 error missing script: start
11 verbose exit [ 1, true ]
From the debug file:
{
"name": "sridhar",
"version": "1.0.0",
"description": "landing page",
"main": "index.js",
"scripts": {
"compile:sass": "node-sass sass/main.scss css/style.css -w"
},
"author": "sridhar",
"license": "ISC",
"devDependencies": {
"node-sass": "^4.8.3"
}
}

Answer 1

You are missing the entry start in the scripts section of your package.json. If you want to compile the file using npm start then, you should copy node-sass sass/main.scss css/style.css -w and paste it as a value for start. You can add any command you would like to execute as the value for start.
Having said that, if you do npm "compile:sass" it will compile your sass files if you don't want to change your package.json.
"scripts": {
...
"compile:sass": "node-sass sass/main.scss css/style.css -w",
"start": "node-sass sass/main.scss css/style.css -w"
},

Answer 2

Because there is no start script... Just change compile script to start script... Then it will compile your sass files...
"scripts": {
"start": "node-sass sass/main.scss css/style.css -w"
},

Answer 3

npx proved to be more effective to me, instead of using npm after several trials.
The below code worked for me:
npx babel --watch src --out-dir . --presets react-app/prod
It did not require me to manually edit the package.json anymore. Everything went smooth.
For more information please refer to the official documentation page https://reactjs.org/docs/add-react-to-a-website.html#optional-try-react-with-jsx
Cheers

Answer 4

Try removing npx and just use create-react-app itworks

Answer 5

You should remove whatever is there in the script object (If you have just created the project) in package.json file, and put these two lines in.
"start": "webpack-dev-server --mode development --open --hot",
"build": "webpack --mode production"
Folks forget to do that sometimes.And leave the "test" case in. Also make sure you have installed all the dependencies you need for your project, from webpack-cli to other stuff mentioned in the error stack trace.
Hope this works.