“npm 错误！ 在创建新的反应应用程序时，JSON 输入的意外结束

Question

[enter image description here][1] npm

I am trying for so many times to create a app in react but every time the CMD showing an ERR!

here is code: Microsoft Windows [Version 10.0.18363.476] (c) 2019 Microsoft Corporation. All rights reserved.

C:\Users\Sumit>E: The system cannot find the drive specified.

C:\Users\Sumit>D:

D:>React js 'React' is not recognized as an internal or external command, operable program or batch file.

D:>react js 'react' is not recognized as an internal or external command, operable program or batch file.

D:>React js 'React' is not recognized as an internal or external command, operable program or batch file.

D:>create-react-app my_react

Creating a new React app in D:\my_react.

Installing packages. This might take a couple of minutes. Installing react, react-dom, and react-scripts...

npm ERR! Response timeout while trying to fetch https://registry.npmjs.org/react (over 30000ms)

npm ERR: A complete log of this run can be found in: npm ERR. C:\Users\Sumit\AppData\Roaming\npm-cache_logs\2020-06-01T14_33_43_496Z-debug.log

Aborting installation. npm install --save --save-exact --loglevel error react react-dom react-scripts has failed.

Deleting generated file... package.json Deleting my_react / from D:\ Done.

D:>create-react-app my-react-app

Creating a new React app in D:\my-react-app.

Installing packages. This might take a couple of minutes. Installing react, react-dom, and react-scripts...

npm ERR. Unexpected end of JSON input while parsing near '...Y3hEcJW8se9P4K6+GYGu9'

npm ERR: A complete log of this run can be found in: npm ERR. C:\Users\Sumit\AppData\Roaming\npm-cache_logs\2020-06-01T14_34_57_334Z-debug.log

Aborting installation. npm install --save --save-exact --loglevel error react react-dom react-scripts has failed.

Deleting generated file... package.json Deleting my-react-app / from D:\ Done.

D:>create-react-app new-react

Creating a new React app in D:\new-react.

Installing packages. This might take a couple of minutes. Installing react, react-dom, and react-scripts...

npm ERR. Unexpected end of JSON input while parsing near '...gAAwSQP/RpJCkm/rgw8jt'

npm ERR: A complete log of this run can be found in: npm ERR. C:\Users\Sumit\AppData\Roaming\npm-cache_logs\2020-06-01T14_38_28_735Z-debug.log

Aborting installation. npm install --save --save-exact --loglevel error react react-dom react-scripts has failed.

Deleting generated file... package.json Deleting new-react / from D:\ Done.

D:>npm create-react-app my-react-aplication

Usage: npm

where is one of: access, adduser, audit, bin, bugs, c, cache, ci, cit, clean-install, clean-install-test, completion, config, create, ddp, dedupe, deprecate, dist-tag, docs, doctor, edit, explore, fund, get, help, help-search, hook, i, init, install, install-ci-test, install-test, it, link, list, ln, login, logout, ls, org, outdated, owner, pack, ping, prefix, profile, prune, publish, rb, rebuild, repo, restart, root, run, run-script, s, se, search, set, shrinkwrap, star, stars, start, stop, t, team, test, token, tst, un, uninstall, unpublish, unstar, up, update, v, version, view, whoami

npm -h quick help on npm -l display full usage info npm help search for help on npm help npm involved overview

Specify configs in the ini-formatted file: C:\Users\Sumit.npmrc or on the command line via: npm --key value Config info can be viewed via: npm help config

npm@6.14.4 C:\Program Files\nodejs\node_modules\npm

D:>npx create-react-app my-react

Creating a new React app in D:\my-react.

Installing packages. This might take a couple of minutes. Installing react, react-dom, and react-scripts...

npm ERR. Unexpected end of JSON input while parsing near '...gAAwSQP/RpJCkm/rgw8jt'

npm ERR: A complete log of this run can be found in: npm ERR. C:\Users\Sumit\AppData\Roaming\npm-cache_logs\2020-06-01T14_54_02_126Z-debug.log

Aborting installation. npm install --save --save-exact --loglevel error react react-dom react-scripts has failed.

Deleting generated file... package.json Deleting my-react / from D:\ Done.

D:>

Answer 1

There are two things that you can do that might possibily help you resolve the issue you are facing.

1.If you are on a slow internet connection you might have to increase the timeout from 30s to 60s by adding this to your.npmrc file:

timeout=6000

You can find the.npmrc file at the path:

C:\Program Files\nodejs\node_modules\npm

2. This issue might be due to npm version mismatch, you can try to install the latest npm version by typing the following command in cmd:

npm install -g npm

Hope this helps!!

Answer 2

if you didn't install npm in general mode, it should better you do it with this comment in the root with the command
npm install -g , or if you did it before you need to update it with the command npm update [-g]