npm ERR! Error: Method Not Allowed 和 npm ERR! code ETARGET npm ERR! code EINTEGRITY 解决方法
我们在使用前后端分离的时候，下载前端的项目，要对项目进行初始化。在初始化过程中我们会遇到如下的问题。
npm WARN package.json [email protected] 'repositories' (plural) Not supported. Please pick one as the 'repository' field
npm ERR! Error: Method Not Allowed
npm ERR! at errorResponse (D:\IDE\nodejs\node_modules\npm\lib\cache\add-named.js:260:10)
npm ERR! at D:\IDE\nodejs\node_modules\npm\lib\cache\add-named.js:203:12
npm ERR! at saved (D:\IDE\nodejs\node_modules\npm\node_modules\npm-registry-client\lib\get.js:167:7)
npm ERR! at Object.oncomplete (fs.js:108:15)
npm ERR! If you need help, you may report this *entire* log,
npm ERR! including the npm and node versions, at:
npm ERR! ;
解决方法重新安装 node.js
参照：https://github.com/npm/npm/issues/20830
如果安装或者更新不了，可以把安装目录下面的 含有 npm的文件移动到一个备份文件就可以做相应的安装，和npm 升级，降级。
npm WARN deprecated [email protected]: CircularJSON is in maintenance only, flatted is its successor.
npm ERR! code ETARGET
npm ERR! notarget No matching version found for @babel/code-frame@^7.5.5.
npm ERR! notarget In most cases you or one of your dependencies are requesting
npm ERR! notarget a package version that doesn't exist.
npm ERR! notarget
npm ERR! notarget It was specified as a dependency of '@babel/core'
npm ERR! notarget
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\jimiStephen\AppData\Roaming\npm-cache\_logs\2020-02-05T08_17_48_310Z-debug.log
出现上面的提示，要执行npm update 对引用的包进行更新；如果没有找到相应的安装包，要使用 npm install XXX 进行安装。
npm ERR! code EINTEGRITY
npm ERR! Verification failed while extracting [email protected]:
npm ERR! sha1-zdTETTqiZOrC9o7BZbx5HDSvEjI= integrity checksum failed when using sha1: wanted sha1-zdTETTqiZOrC9o7BZbx5HDSvEjI= but got sha512-spKHSBQIxxS81N/O21WmuXA2F6wppUCsutpzenOeZzOCCJ5gEfcbqJP983IrpLXzYmXnMUa6J03SubcNPdKrlg== sha1-5oowx8sET
i+zYrQoRp/rKRwuCdg=. (10700 bytes)
解决方案：
https://stackoverflow.com/questions/47545940/when-i-run-npm-install-it-returns-with-err-code-eintegrity-npm-5-3-0