npm install 的 --save 选项是什么? [英] What is the --save option for npm install?

问题描述

我看到了一些命令所在的教程:

I saw some tutorial where the command was:

npm install --save

--save 选项是什么意思?

无法在 Google 上找到答案.

Not able to find the answer on Google.

推荐答案

更新 npm 5:

从 npm 5.0.0 开始，已安装的模块默认添加为依赖项，因此不再需要 --save 选项.其他保存选项仍然存在，并列在 npm install文档中>.

As of npm 5.0.0, installed modules are added as a dependency by default, so the --save option is no longer needed. The other save options still exist and are listed in the documentation for npm install.

原答案:

在版本 5 之前，NPM 只是默认在 node_modules 下安装一个包.当您尝试为您的应用程序/模块安装依赖项时，您需要先安装它们，然后将它们(连同适当的版本号)添加到您的 package 的 dependencies 部分.json.

Before version 5, NPM simply installed a package under node_modules by default. When you were trying to install dependencies for your app/module, you would need to first install them, and then add them (along with the appropriate version number) to the dependencies section of your package.json.

--save 选项指示 NPM 自动将包包含在 package.json 的 dependencies 部分中，从而节省您一个额外的步骤.

The --save option instructed NPM to include the package inside of the dependencies section of your package.json automatically, thus saving you an additional step.

此外，还有补充选项 --save-dev 和 --save-optional 将包保存在 devDependencies 和optionalDependencies，分别.这在安装仅用于开发的软件包时很有用，例如 grunt 或您的测试库.

In addition, there are the complementary options --save-dev and --save-optional which save the package under devDependencies and optionalDependencies, respectively. This is useful when installing development-only packages, like grunt or your testing library.

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