Component library architecture design

1. Introduction

This document aims to provide a blueprint for the design of a component library, enabling the logic, style performance, and interfaces of components to be independently developed and maintained, thereby enhancing code reusability, maintainability, and team collaboration efficiency.

2. Architecture Overview

2.1 Design Goals

• Modularity: Components should be independent, facilitating reuse and composition.
• Customizability: Allow developers to customize styles and behaviors according to project needs.
• Maintainability: Through clear interfaces, simplify the process of updating and maintaining components.

2.2 Components Composition

A component mainly consists of the following three parts:

• Logic (Behavior): Business logic and state management.
• Style Representation (Style): The appearance and style of the component.
• Interface (API): The properties and methods exposed by the component.

3. Component Logic

3.1 Logic Design Principles

• Decoupling: Component logic and styles should be independent to ensure logic can be reused in different contexts.
• State Management: Use lightweight state management tools (e.g., React Context or Redux) to handle component state.

3.2 Implementation

• Single Responsibility Principle: Each component should be responsible for a specific function to avoid complexity.
• State Lifting: If state needs to be shared, use parent components to lift state management.

4. Style Representation

4.1 Style Design Principles

• Consistency: Styles should adhere to a unified design specification to maintain visual consistency.
• Reusability: Styles are organized based on classes and variables for ease of reuse and modification.

4.2 Implementation

• CSS Modules or Styled Components: Write independent style files for each component to avoid global style conflicts.
• Theme Management: Support theme switching, with the ability to dynamically modify styles using CSS variables or stylesheets.

5. Component Interface

5.1 Interface Design Principles

• Simplicity: The component's API should be intuitive and easy to understand.
• Flexibility: Support default values, callback functions, and event handling.

5.2 Property and Method Definition

• Input Properties: Used to receive data and configurations passed from parent components. Example:

  interface ButtonProps {  
      label: string;             // Button text  
      onClick: () => void;      // Click event callback  
      disabled?: boolean;       // Whether the button is disabled  
  }