pom依赖各节点说明_节点模块中的对等依赖性是什么？

pom依赖各节点说明

In some package.json files, you might see a few lines like this:

在一些package.json文件中，您可能会看到几行这样的内容：

{
  //...
  "peerDependencies": {
    "libraryName": "1.x"
  }
}

You might have already seen dependencies and devDependencies, but not peerDependencies.

您可能已经看到了dependencies和devDependencies ，但没有peerDependencies 。

dependencies are the packages your project depends on.

dependencies是项目所dependencies的包。

devDependencies are the packages that are needed during the development phase. Say a testing framework like Jest or other utilities like Babel or ESLint.

devDependencies是开发阶段所需的软件包。 说一个测试框架，例如Jest或其他实用程序，例如Babel或ESLint 。

In both cases, when you install a package, its dependencies and devDependencies are automatically installed by npm.

在这两种情况下，安装软件包时， npm都会自动安装其依赖项和devDependencies。

peerDependencies are different. They are not automatically installed.

peerDependencies不同。 它们不会自动安装。

When a dependency is listed in a package as a peerDependency, it is not automatically installed. Instead, the code that includes the package must include it as its dependency.

在包中将依赖项作为peerDependency列出时， 不会自动安装 。 而是，包含程序包的代码必须包含它作为其依赖项。

npm will warn you if you run npm install and it does not find this dependency.

如果您运行npm install ， npm会警告您，并且找不到此依赖项。

Example: let’s say package a includes dependency b:

示例：假设包a包括依赖项b ：

a/package.json

a/package.json

{
  //...
  "dependencies": {
    "b": "1.x"
  }
}

Package b in turn wants package c as a peerDependency:

程序包b又希望程序包c作为peerDependency：

b/package.json

b/package.json

{
  //...
  "peerDependencies": {
    "c": "1.x"
  }
}

In package A, we must therefore add c as a dependency, otherwise when you install package b, npm will give you a warning (and the code will likely fail at runtime):

因此，在软件包A中，我们必须将c添加为依赖项，否则，在安装软件包b ，npm会向您发出警告(并且代码可能会在运行时失败)：

a/package.json

a/package.json

{
  //...
  "dependencies": {
    "b": "1.x",
    "c": "1.x"
  }
}

The versions must be compatible, so if a peerDependency is listed as 2.x, you can’t install 1.x or another version. It all follows semantic versioning.

这些版本必须兼容，因此，如果peerDependency列为2.x ，则不能安装1.x或其他版本。 全部遵循语义版本控制 。

翻译自: https://flaviocopes.com/npm-peer-dependencies/

pom依赖各节点说明