一直在尝试使用以下命令安装jest：
npm i --global jest并获取这些消息：
npm WARN deprecated [email protected]: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated [email protected]: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated [email protected]: request-promise-native has been deprecated because it extends the now deprecated request package, see https://github.com/request/request/issues/3142
npm WARN deprecated [email protected]: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated [email protected]: this library is no longer supported
/Users/GRW/.nvm/versions/node/v6.11.1/bin/jest -> /Users/GRW/.nvm/versions/node/v6.11.1/lib/node_modules/jest/bin/jest.js
npm WARN [email protected] requires a peer of canvas@^2.5.0 but none is installed. You must install peer dependencies yourself.
npm WARN [email protected] requires a peer of bufferutil@^4.0.1 but none is installed. You must install peer dependencies yourself.
npm WARN [email protected] requires a peer of utf-8-validate@^5.0.2 but none is installed. You must install peer dependencies yourself.
+ [email protected]
updated 1 package in 32.731s
已尝试手动安装对等依赖项：
npm i --save --global canvas@^2.5.0
npm i --save --global bufferutil@^4.0.1
npm i --save --global utf-8-validate@^5.0.2
但仍然无法安装jest。
如何安装jest？
编辑：忘记全局安装和对等依赖警告消失，但我仍然得到： -bash：开玩笑：找不到命令
由于我之前似乎安装了 nvm，并将不同版本的 node 安装在不同的目录中，因此我决定重新开始。
已卸载并删除 jest、node、npm 和 nvm。
重新安装了 node/npm，并且能够安装 jest 并让
jest -v你试过这个吗？
sudo npm install -g jest