create-react-app can not run after install a module

Question

I created a React app by the command create-react-app qiyujidemo I installed and can run the app well. Then I installed a module with npm install [email protected] react-weui --save. After the module is installed, I type the npm start. Then, there is something wrong.

[email protected] start /Users/yianwork/wechat/qiyujidemo
react-scripts start
sh: react-scripts: command not found
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn
npm ERR! [email protected] start: react-scripts start
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the [email protected] start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/yianwork/.npm/_logs/2017-08-07T08_41_16_944Z-debug.log

I copy the /Users/yianwork/.npm/_logs/2017-08-07T08_41_16_944Z-debug.log.

0 info it worked if it ends with ok
1 verbose cli [ '/usr/local/Cellar/node/8.1.0_1/bin/node',
1 verbose cli   '/usr/local/bin/npm',
1 verbose cli   'start' ]
2 info using [email protected]
3 info using [email protected]
4 verbose run-script [ 'prestart', 'start', 'poststart' ]
5 info lifecycle [email protected]~prestart: [email protected]
6 silly lifecycle [email protected]~prestart: no script for prestart, continuing
7 info lifecycle [email protected]~start: [email protected]
8 verbose lifecycle [email protected]~start: unsafe-perm in lifecycle true
9 verbose lifecycle [email protected]~start: PATH: /usr/local/lib/node_modules/npm/bin/node-gyp-bin:/Users/yianwork/wechat/qiyujidemo/node_modules/.bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/yianwork/Library/Android/sdk/tools:/Users/yianwork/Library/Android/sdk/platform-tools
10 verbose lifecycle [email protected]~start: CWD: /Users/yianwork/wechat/qiyujidemo
11 silly lifecycle [email protected]~start: Args: [ '-c', 'react-scripts start' ]
12 info lifecycle [email protected]~start: Failed to exec start script
13 verbose stack Error: [email protected] start: `react-scripts start`
13 verbose stack spawn ENOENT
13 verbose stack     at ChildProcess.<anonymous> (/usr/local/lib/node_modules/npm/lib/utils/spawn.js:33:16)
13 verbose stack     at emitTwo (events.js:125:13)
13 verbose stack     at ChildProcess.emit (events.js:213:7)
13 verbose stack     at maybeClose (internal/child_process.js:887:16)
13 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:208:5)
14 verbose pkgid [email protected]
15 verbose cwd /Users/yianwork/wechat/qiyujidemo
16 verbose Darwin 16.4.0
17 verbose argv "/usr/local/Cellar/node/8.1.0_1/bin/node" "/usr/local/bin/npm" "start"
18 verbose node v8.1.0
19 verbose npm  v5.0.3
20 error file sh
21 error code ELIFECYCLE
22 error errno ENOENT
23 error syscall spawn
24 error [email protected] start: `react-scripts start`
24 error spawn ENOENT
25 error Failed at the [email protected] start script.
25 error This is probably not a problem with npm. There is likely additional logging output above.
26 verbose exit [ 1, true ]

I type the yarn start, then the following error is shown:

yians-iMac:qiyujidemo yianwork$ yarn start
yarn start v0.24.5
$ react-scripts start
sh: react-scripts: command not found
error Command failed with exit code 127.

Who can solve this problem? What is wrong?

I create a new project by create-react-app. It runs well. Then I installed the React-router, and the same problem occurs. I uninstalled react-weui, but still it can't run.

When I write the yarn add antd in the create-react-app demo, the project is run well. Must I use yarn to add a dependency?

Does it works again if you uninstall those packages ? npm uninstall weui react-weui --save — Fawaz
– Fawaz, Commented Aug 7, 2017 at 9:21
@Fawaz I create a new project by create-react-app. It runs well. Then I install the npm install --save react-router, and the same problem show. I run the npm uninstall weui react-weui --save it can't run yet. — jiexishede
– jiexishede, Commented Aug 7, 2017 at 9:31
did you install create-react-app globally ? Did you clean your node_modules folders ? stackoverflow.com/questions/40546231/… — Nevosis
– Nevosis, Commented Aug 7, 2017 at 9:39
@Nevosis As I can use the create-react-app in every folder, I think I install the create-react-app globally. I delete the node_modules and install again, the project can't run yet. — jiexishede
– jiexishede, Commented Aug 7, 2017 at 10:05
@jiexishede Its also been reported that there are issues with npm v5 here stackoverflow.com/questions/44860917/… So can you downgrade and check if that works like suggested in the link. — Fawaz
– Fawaz, Commented Aug 7, 2017 at 10:22

Brian Hollingsworth · Accepted Answer · 2020-02-07 01:41:32Z

0

Do you have react-scripts in your package.json? If not, install it and add the following to your package.json:

"scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject",
    "predeploy": "npm run build && cp CNAME build/CNAME",
    "deploy": "gh-pages -d build"
}

answered Feb 7, 2020 at 1:41

Brian Hollingsworth

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