出現問題的情況：

或者：

D:\Program Files\nodejs>npm i --save-dev prettier

npm WARN saveError ENOENT: no such file or directory, open 'D:\Program Files\nodejs\package.json'

npm notice created a lockfile as package-lock.json. You should commit this file.

npm WARN enoent ENOENT: no such file or directory, open 'D:\Program Files\nodejs\package.json'

npm WARN nodejs No description

npm WARN nodejs No repository field.

npm WARN nodejs No README data

npm WARN nodejs No license field.

+ [email protected]

added 1 package from 1 contributor and audited 5020 packages in 7.879s

found 0 vulnerabilities

解決方法一：

D:\Program Files\nodejs>cd node_modules\npm

D:\Program Files\nodejs\node_modules\npm>npm i --save-dev prettier

npm notice created a lockfile as package-lock.json. You should commit this file.

+ [email protected]

added 1 package from 1 contributor and audited 5019 packages in 3.56s

found 0 vulnerabilities

解決方法二：

將D:\Program Files\nodejs\node_modules\npm 目錄下的package.json複製到

開啟cmd的當前路徑下(C:\Users\rfzhang>)再執行npm i --save-dev prettier命令。

執行結果：