Building a Vue component library requires designing the structure around the business scenario and following the complete process of development, testing and release. 1. The structural design should be classified by functional modules, including basic components, layout components and business components; 2. Use SCSS or CSS variables to unify the topic and style; 3. Unify the naming specifications and introduce ESLint and Prettier to ensure the consistent code style; 4. Display the usage of components in the supporting document site; 5. Use Vite and other tools to package as NPM packages and configure rollupOptions; 6. Follow the semver specification to manage versions and changelogs when publishing.

The core of building a Vue component library is to have clear structure, strong maintenance and easy reuse . It’s not just putting the components together, but forming a set of processes from design, development, testing to release.

Structural design of component library: first think clearly about how to organize it

The component library is not as complete as possible, but the structure should be designed around the business scenario . You can classify it by functional modules, such as basic components (buttons, input boxes), layout components (containers, grids), business components (forms, table encapsulations), etc.

• Basic components : the most versatile and does not rely on specific business logic
• Business components : Based on the basic component encapsulation, which may contain interface calls or specific data processing
• Theme and style management : SCSS or CSS variables are recommended to facilitate unifying styles and customization

Plan the directory structure from the beginning, for example:

 components/
  base/
    Button.vue
    Input.vue
  layout/
    Container.vue
  business/
    UserTable.vue
styles/
  variables.scss
utils/
  index.js

This not only makes team collaboration smoother, but also makes it easier to expand later.

Development specifications: Unified coding style and naming rules

In Vue project, it is recommended to unify the naming of PascalCase, props and emit to keep the semantics clear. for example:

 props: {
  label: String,
  isLoading: Boolean
},
emits: ['update:loading', 'submit']

At the same time, it is a good habit to introduce ESLint and Prettier, which can ensure the consistent code style when multiple people collaborate.

If you plan to release it, it is recommended that each component provide demo and documentation instructions. You can use VitePress or VuePress to write a document site to display component usage and effects.

Packaging and Publishing: Make the component library truly available

After local development is completed, the next step is to package it into an NPM package. You can choose to build with Vite, Rollup, or Webpack.

Taking Vite as an example, configure build.lib mode to generate component library files:

 build: {
  lib: {
    entry: path.resolve(__dirname, 'src/index.js'),
    name: 'MyComponentLibrary',
    fileName: (format) => `my-component-library.${format}.js`
  },
  rollupOptions: {
    external: ['vue'],
    output: {
      globals: {
        vue: 'Vue'
      }
    }
  }
}

After packaging is complete, don't forget to set the correct entry files and dependencies in package.json . If it is a private component library, it can also be integrated into the project through private NPM or Git Submodule.

In addition, version control is also important. Every time you update the component content, remember to use semver specification to update the version number and submit the changelog.

Basically that's it. The component library does not end in one go. It requires continuous iteration, optimization of experience, and continuous adjustment in line with the actual use of the team. As long as you set up the shelf at the beginning, you won’t be too tired to maintain it later.

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