npm 创建了大量文件，我做错了什么？
npm creates huge number of files, what am I doing wrong?
我阅读的方式this section of the PhpStorm manual，添加开发工具我可以这样做：
If a tool is a documentation or a test framework, which are of no need
for those who are going to re-use your application, it is helpful to
have it excluded from download for the future. This is done by marking
the tool as a development dependency, which actually means adding the
tool in the devDependencies section of the package.json file.
With PhpStorm, you can have a tool marked as a development dependency
right during installation. Do one of the following:
Switch to the project root folder and type the following command at
the command line prompt: npm install --dev <tool name>
[...]
这个好像不对或者我理解错了，因为当我运行
npm install --dev del
为了得到一个可以在开发过程中删除文件以清除缓存的工具，npm 创建了一个深度嵌套的文件夹结构，其大小为数 GB，包含数百万个文件。我杀了它，然后花了半个小时将更深的文件夹在树中进一步向上移动，以便路径足够短 Windows 可以删除它们。
我做错了什么？
顺便说一下，将它添加到 package.json -> devDependencies 和 运行 npm install 工作正常。
节点 0.12.0，npm 2.5.1
已知错误，https://github.com/npm/npm/issues/5554. This flag will be removed soon - see https://github.com/npm/npm/issues/6200。我建议改用 npm install --save-dev - 但您需要先创建一个 package.json。在 PHPStorm 中，这可以使用 File | New | package.json
来完成
我阅读的方式this section of the PhpStorm manual，添加开发工具我可以这样做：
If a tool is a documentation or a test framework, which are of no need for those who are going to re-use your application, it is helpful to have it excluded from download for the future. This is done by marking the tool as a development dependency, which actually means adding the tool in the devDependencies section of the package.json file.
With PhpStorm, you can have a tool marked as a development dependency right during installation. Do one of the following:
Switch to the project root folder and type the following command at the command line prompt:
npm install --dev <tool name>[...]
这个好像不对或者我理解错了，因为当我运行
npm install --dev del
为了得到一个可以在开发过程中删除文件以清除缓存的工具，npm 创建了一个深度嵌套的文件夹结构，其大小为数 GB，包含数百万个文件。我杀了它，然后花了半个小时将更深的文件夹在树中进一步向上移动，以便路径足够短 Windows 可以删除它们。
我做错了什么？
顺便说一下，将它添加到 package.json -> devDependencies 和 运行 npm install 工作正常。
节点 0.12.0，npm 2.5.1
已知错误，https://github.com/npm/npm/issues/5554. This flag will be removed soon - see https://github.com/npm/npm/issues/6200。我建议改用 npm install --save-dev - 但您需要先创建一个 package.json。在 PHPStorm 中，这可以使用 File | New | package.json