最好看错误提示，若缺少包文件，就依次安装

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问题一

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! uglifyjs-webpack-plugin@0.4.6 postinstall: `node lib/post_install.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the uglifyjs-webpack-plugin@0.4.6 postinstall 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!     C:\Users\xiant_000\AppData\Roaming\npm-cache\_logs\2019-09-14T23_49_41_121Z-debug.log

解决一

进入项目目录，运行命令：
npm install --save-dev postinstall
npm audit fix --force

问题二

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.9.2 postinstall: node scripts/build.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@4.9.2 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

解决二

进入项目目录，运行命令：
npm install --save-dev node-sass
npm audit fix --force
或
npm rebuild node-sass(未测试)

问题三

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! sell@1.0.0 dev: `webpack-dev-server --inline --progress --config build/webpack.dev.conf.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the sell@1.0.0 dev 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!     C:\Users\xiant_000\AppData\Roaming\npm-cache\_logs\2019-09-15T00_18_31_634Z-debug.log

解决三

npm install --save-dev webpack
npm audit fix --force

本文题目：npminstall报错(npmERR!errno1)
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