我如何安装 jest？

Question

一直在尝试使用以下命令安装jest ：

npm i --global jest

并收到这些消息：

npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated request-promise-native@1.0.9: 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 request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated har-validator@5.1.5: 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 jsdom@16.4.0 requires a peer of canvas@^2.5.0 but none is installed. You must install peer dependencies yourself.
npm WARN ws@7.3.1 requires a peer of bufferutil@^4.0.1 but none is installed. You must install peer dependencies yourself.
npm WARN ws@7.3.1 requires a peer of utf-8-validate@^5.0.2 but none is installed. You must install peer dependencies yourself.

+ jest@26.4.2
updated 1 package in 32.731s

已尝试使用以下方法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 。

我如何安装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: jest: command not found

Answer 1

由于我之前似乎安装了nvm ，它将不同版本的node安装保存在不同的目录中，因此我决定重新开始。

卸载并删除jest 、 node 、 npm和nvm 。

重新安装node / npm ，并且能够安装jest并使jest -v命令正常工作。