如何查看npm devdependencies的安装路径？

在软件开发过程中，npm（Node Package Manager）作为JavaScript生态系统中的包管理工具，已经成为前端开发者的必备利器。npm不仅可以帮助开发者快速安装和管理项目依赖，还可以方便地查看项目中的所有依赖。那么，如何查看npm devdependencies的安装路径呢？本文将详细介绍这一过程。

一、理解devdependencies

在npm中，devdependencies指的是项目开发过程中所需的依赖，这些依赖通常用于开发、测试或构建项目，但不是项目运行所必需的。例如，开发工具、测试框架、构建工具等。

二、查看devdependencies的安装路径

1. 使用npm list命令

   使用npm list命令可以查看项目中所有依赖，包括devdependencies。命令如下：

   npm list --depth=0
   
   

   --depth=0参数表示只显示顶层依赖，不包括子依赖。执行此命令后，你会看到类似以下输出：

   @types/node@14.0.26 node
   
   jest@26.6.3
   
   typescript@4.0.5
   
   

   其中，每个依赖项后面跟着的@version表示该依赖的版本号。

2. 查看依赖的安装路径

   查看devdependencies的安装路径，可以使用npm view命令。命令如下：

   npm view  package.json
   
   

   将替换为你想要查看的依赖名称。例如，查看jest的安装路径：

   npm view jest package.json
   
   

   执行此命令后，你会看到类似以下输出：

   { "name": "jest",
   
     "version": "26.6.3",
   
     "description": "A delightful JavaScript Testing Framework with a focus on simplicity.",
   
     "main": "build/jest.js",
   
     "scripts": {
   
       "test": "jest"
   
     },
   
     "bin": {
   
       "jest": "build/bin/jest.js"
   
     },
   
     "dependencies": {
   
       "chalk": "^4.0.0",
   
       "jest-cli": "^26.6.3",
   
       "jest-config": "^26.6.3",
   
       "jest-diff": "^26.6.3",
   
       "jest-environment-jsdom": "^26.6.3",
   
       "jest-environment-node": "^26.6.3",
   
       "jest-fetch-mock": "^4.1.0",
   
       "jest-globals": "^26.6.3",
   
       "jest-haste-map": "^26.6.3",
   
       "jest-jasmine2": "^26.6.3",
   
       "jest-jasmine2-transform": "^26.6.3",
   
       "jest-matcher-utils": "^26.6.3",
   
       "jest-message-util": "^26.6.3",
   
       "jest-resolve": "^26.6.3",
   
       "jest-runtime": "^26.6.3",
   
       "jest-snapshot": "^26.6.3",
   
       "jest-transform": "^26.6.3",
   
       "jest-transform-node": "^26.6.3",
   
       "jest-transform-stub": "^26.6.3",
   
       "jest-util": "^26.6.3",
   
       "jest-worker": "^26.6.3",
   
       "jest-validate": "^26.6.3",
   
       "jest-watch": "^26.6.3",
   
       "jest-worker": "^26.6.3"
   
     },
   
     "devDependencies": {
   
       "jest-cli": "^26.6.3",
   
       "jest-config": "^26.6.3",
   
       "jest-environment-jsdom": "^26.6.3",
   
       "jest-environment-node": "^26.6.3",
   
       "jest-fetch-mock": "^4.1.0",
   
       "jest-globals": "^26.6.3",
   
       "jest-haste-map": "^26.6.3",
   
       "jest-jasmine2": "^26.6.3",
   
       "jest-jasmine2-transform": "^26.6.3",
   
       "jest-matcher-utils": "^26.6.3",
   
       "jest-message-util": "^26.6.3",
   
       "jest-resolve": "^26.6.3",
   
       "jest-runtime": "^26.6.3",
   
       "jest-snapshot": "^26.6.3",
   
       "jest-transform": "^26.6.3",
   
       "jest-transform-node": "^26.6.3",
   
       "jest-transform-stub": "^26.6.3",
   
       "jest-util": "^26.6.3",
   
       "jest-worker": "^26.6.3",
   
       "jest-validate": "^26.6.3",
   
       "jest-watch": "^26.6.3",
   
       "jest-worker": "^26.6.3"
   
     },
   
     "peerDependencies": {},
   
     "optionalDependencies": {},
   
     "bundledDependencies": [],
   
     "keywords": [
   
       "test",
   
       "testing",
   
       "test-framework",
   
       "jest"
   
     ],
   
     "bugs": {
   
       "url": "https://github.com/facebook/jest/issues"
   
     },
   
     "homepage": "https://jestjs.io/",
   
     "repository": {
   
       "type": "git",
   
       "url": "git+https://github.com/facebook/jest.git"
   
     },
   
     "engines": {
   
       "node": ">=10.13.0"
   
     },
   
     "author": {
   
       "name": "Facebook, Inc.",
   
       "email": "jest@fb.com"
   
     },
   
     "license": "MIT",
   
     "contributors": [
   
       "Facebook, Inc."
   
     ],
   
     "funding": {
   
       "type": "open-sourced",
   
       "url": "https://github.com/sponsors/facebook"
   
     },
   
     "publishConfig": {
   
       "access": "public"
   
     },
   
     "gitHead": "e6e3b6c9f8e3a5a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e2a3a7c3a5e
   
   

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