node.js - npm install的--save选项是什么？(What is the --save option for npm install?)

Question

I saw some tutorial where the command was:

(我看到了一些命令所在的教程：)

npm install --save

What does the --save option mean?

(--save选项是什么意思？)

Not able to find the answer on Google.

(在Google上找不到答案。)

  ask by Dmitri translate from so

Answer 1

Update npm 5:

(更新npm 5：)

As of npm 5.0.0 , installed modules are added as a dependency by default, so the --save option is no longer needed.

(从npm 5.0.0开始 ，默认情况下已安装的模块作为依赖项添加，因此不再需要--save选项。)

The other save options still exist and are listed in the documentation for npm install .

(其他保存选项仍然存在，并在npm install的文档中列出。)

Original answer:

(原始答案：)

Before version 5, NPM simply installed a package under node_modules by default.

(在版本5之前，默认情况下，NPM只是在node_modules下安装了一个软件包。)

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 .

(当您尝试为应用程序/模块安装依赖项时，您需要先安装它们，然后将它们（以及适当的版本号）添加到package.json的dependencies部分。)

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.

(--save选项指示NPM自动将软件包包括在package.json的dependencies部分中，从而为您节省了额外的步骤。)

In addition, there are the complementary options --save-dev and --save-optional which save the package under devDependencies and optionalDependencies , respectively.

(此外，还有补充选项--save-dev和--save-optional ，它们分别将软件包保存在devDependencies和optionalDependencies下。)

This is useful when installing development-only packages, like grunt or your testing library.

(在安装仅限开发的软件包（例如grunt或测试库）时，这很有用。)