克隆Redux项目运行npm start报错，node_modules缺失及webpack-dev-server未找到

Hey there! Let's break down what's going on here and get your app up and running smoothly.

What's Causing the Error? #

Looking at your error log, two key clues tell us exactly what's wrong:

• sh: 1: webpack-dev-server: not found
• npm WARN Local package.json exists, but node_modules missing, did you mean to install?

This simply means your project's dependencies (including the webpack-dev-server tool needed to start the app) haven't been installed yet. The node_modules directory—where npm stores all downloaded packages—is missing, so npm can't locate the required tools to execute the start script.

Step-by-Step Solutions #

• First, install all project dependencies
  Navigate to your project root directory and run this command:

  npm install
  

  This will read your package.json file and download every required package into the node_modules folder.

• If webpack-dev-server still isn't found after full dependency install
  You can install it explicitly as a development dependency (this is the recommended approach to avoid global version conflicts):

  npm install webpack-dev-server --save-dev
  

  Alternatively, install it globally if you need access to it across multiple projects:

  npm install -g webpack-dev-server
  

• Troubleshoot npm cache issues (if installation fails)
  Sometimes a corrupted npm cache can block successful package installs. Clear the cache with:

  npm cache clean --force
  

  Then run npm install again to retry the installation.

Once you've completed these steps, give npm start another try—your Redux app should fire up without that annoying error!

内容的提问来源于stack exchange，提问作者Deepak Mahakale