Introduction to vue-loader

The vue-loader is an essential tool for Vue.js developers. It enables us to write single-file Vue components, combining HTML, JavaScript, and CSS in one file with a .vue extension. This tool is crucial for maintaining clean and manageable Vue.js projects.

Installation

Before diving into the APIs, make sure you have vue-loader installed in your project:

npm install -D vue-loader vue-template-compiler

Basic Usage

The following is a basic example demonstrating how to use vue-loader to load a Vue component:

// webpack.config.js
module.exports = {
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader'
      }
    ]
  }
}

API Examples

Using preLoaders and postLoaders

These loader configurations can be used to specify custom loaders to be used before or after vue-loader:

module.exports = {
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: {
          preLoaders: {
            js: 'custom-js-loader'
          },
          postLoaders: {
            html: 'custom-html-loader'
          }
        }
      }
    ]
  }
}

Scoped CSS

With vue-loader, you can scope your CSS to the component itself:

CSS Modules

vue-loader also supports CSS Modules, which help to locally scope CSS by default:

module.exports = {
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: {
          cssModules: {
            localIdentName: '[local]_[hash:base64:8]',
            camelCase: true
          }
        }
      }
    ]
  }
}

Custom Blocks

You can create custom blocks within your Vue components:

module.exports = {
  module: {
    rules: [
      {
        resourceQuery: /blockType=foo/,
        loader: 'foo-loader'
      }
    ]
  }
}

console.log("This is a custom block!");

Application Example

Here is a full example of an application using vue-loader with some of the APIs mentioned above:

console.log("Custom block code for ChildComponent");

By following the above configurations and code snippets, you can effectively harness the power of vue-loader to create and manage complex Vue.js applications.

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