Npm 为什么即使我'；您是否已在全球范围内安装了该软件包？

我无法在任意目录中运行

webpack--help

，出现以下错误：

One CLI for webpack must be installed. These are recommended choices, delivered as separate packages:
 - webpack-cli (https://github.com/webpack/webpack-cli)
   The original webpack full-featured CLI.
We will use "npm" to install the CLI via "npm install -D".
Do you want to install 'webpack-cli' (yes/no): o
You need to install 'webpack-cli' to use webpack via CLI.
You can also install the CLI manually.

---

很明显，我在

npm

和

warn

上都做到了这一点。我缺少什么？

您是否使用npm在全球范围内安装了webpack cli

npm install --global webpack-cli

---

如果是这样，您是否可以使用命令

which webpack cli

？

如果在执行目录中检测到

节点模块

dire，是否会抑制此行为？