Technical decision-making process

Team Collaboration Standards

Team collaboration standards are the foundation for efficiently advancing front-end projects. Without unified standards, code style, commit messages, and branch management can become chaotic, leading to increased maintenance costs. The following elaborates on three dimensions: code style, Git workflow, and documentation management.

Unified Code Style

Use ESLint and Prettier to enforce a consistent code style. Configuration should be placed in the project root directory, with all team members sharing the same set of rules. For example, .eslintrc.js:

module.exports = {
  extends: ['eslint:recommended', 'plugin:react/recommended'],
  rules: {
    'indent': ['error', 2],
    'quotes': ['error', 'single'],
    'semi': ['error', 'always']
  }
};

For CSS, adopt the BEM naming convention:

/* Not recommended */
.button {}
.confirm-button {}

/* BEM convention */
.button {}
.button--confirm {}
.button__icon {}

Standardized Git Workflow

Adopt the Git Flow branching model, paired with clear commit message conventions:

• feat: New feature
• fix: Bug fix
• docs: Documentation changes
• style: Code formatting adjustments
• refactor: Code refactoring

Example commit message:

feat(login): add OAuth2.0 support

- implement Google OAuth
- add error handling
- update login page UI

Use husky to automatically run lint before commits:

// package.json
{
  "husky": {
    "hooks": {
      "pre-commit": "lint-staged"
    }
  }
}

Real-Time Documentation Updates

Documentation should be updated in sync with the code, using Markdown format stored in the /docs directory. Tools like VuePress can be used to generate documentation websites. Key documents include:

1. API.md - API specifications
2. COMPONENTS.md - Component usage instructions
3. WORKFLOW.md - Development workflow

For complex logic, use Mermaid to draw flowcharts:

```mermaid
graph TD
  A[User Login] --> B{Validation Successful?}
  B -->|Yes| C[Redirect to Homepage]
  B -->|No| D[Display Error]
```

Technical Decision-Making Process

Technology selection and architectural changes require a rigorous review mechanism to avoid risks from individual decisions. The complete process includes four stages: proposal, discussion, implementation, and retrospective.

Technical Proposal Template

All technical proposals should follow the RFC document format, including:

# Proposal Title

## Current Situation Analysis
Existing problems and specific cases...

## Proposed Solutions
1. Pros and cons of Solution A  
2. Comparative data for Solution B  

## Impact Assessment
- Scope of changes to existing code  
- Estimated learning cost  
- Performance benchmark results  

Decision Meeting Mechanism

1. Preliminary Review: Proposals must be shared with all members 3 days in advance.
2. Meeting Process:
   • Presenter demonstration (15 minutes)
   • Q&A session (20 minutes)
   • Voting (requires 2/3 majority to pass)

Use a scoring system to evaluate proposals:

Gradual Implementation Plan

Approved solutions should be implemented in phases:

1. Pilot Phase: Test in new feature modules.
2. Monitoring Metrics:

   // Use Sentry to monitor error rates
   Sentry.init({
     dsn: 'YOUR_DSN',
     tracesSampleRate: 0.2
   });
   

3. Full Rollout: Decision based on monitoring data.

Architecture Decision Record (ADR)

All major decisions should be recorded in the docs/adr/ directory:

# 2023-05-01-state-management

## Status
Adopted

## Context
Existing Redux code suffers from over-abstraction...

## Decision
Switch to Zustand because:  
1. Smaller bundle size (2kb vs 7kb)  
2. Simpler API design  
3. Better TypeScript support  

## Consequences
Requires migration of 15 store modules...  

Code Review Standards

PR reviews are critical for ensuring code quality and require a clear checklist.

Review Checklist

1. Functionality Implementation:

   • Does it fully cover requirements?
   • Are edge conditions handled properly?

   // Bad example
   function divide(a, b) {
     return a / b;
   }
   
   // Improved
   function divide(a, b) {
     if (b === 0) throw new Error('Divisor cannot be zero');
     return a / b;
   }
   

2. Performance Considerations:

   • Avoid redundant renders.
   • Use virtual lists for large datasets.

   // Good practice
   const List = React.memo(({ items }) => (
     <VirtualList 
       height={400}
       itemCount={items.length}
       itemSize={50}
     />
   ));
   

3. Test Coverage:

   • Unit test coverage ≥80%.
   • Integration tests for critical paths.

Review Toolchain

1. Automated Checks:

   # GitHub Actions example
   - name: Run tests
     run: npm test
   - name: Check coverage
     run: |
       npm run coverage
       bash <(curl -s https://codecov.io/bash)
   

2. Manual Review:

   • Use GitHub's Review feature.
   • Require at least 2 approvals.
   • Use /approve command to confirm.

Dependency Management Strategy

Front-end dependency management must balance innovation and stability.

Version Control Principles

1. Core Dependencies: Lock major versions.

   "dependencies": {
     "react": "^18.2.0",
     "vue": "~3.2.0"
   }
   

2. Toolchain: Use exact versions.

   "devDependencies": {
     "eslint": "8.31.0",
     "webpack": "5.75.0"
   }
   

Dependency Update Process

1. Run npm outdated on the first Monday of each month.
2. Create a dedicated upgrade branch.
3. Use npm-check-updates for interactive updates:

   ncu -i
   

4. Update logs must include:
   • Reason for update.
   • Testing plan.
   • Rollback strategy.

Security Vulnerability Handling

1. Run npm audit weekly.
2. Critical vulnerabilities (CVSS ≥7) must be fixed within 24 hours.
3. Temporary workaround example:

   // Vulnerable package v1.2.0
   import { safeParse } from 'vulnerable-lib';
   
   // Temporary safe wrapper
   export const parseSafely = (input) => {
     if (input.includes('malicious')) {
       throw new Error('Invalid input');
     }
     return safeParse(input);
   };
   

Error Handling Standards

A unified error handling mechanism significantly improves application robustness.

Front-End Error Classification

Error Boundary Implementation

For React projects, use Error Boundary:

class ErrorBoundary extends React.Component {
  state = { hasError: false };

  static getDerivedStateFromError() {
    return { hasError: true };
  }

  componentDidCatch(error, info) {
    logErrorToService(error, info);
  }

  render() {
    if (this.state.hasError) {
      return <FallbackUI />;
    }
    return this.props.children; 
  }
}

Monitoring Integration

1. Use Performance API to collect data:

   const measurePageLoad = () => {
     const [entry] = performance.getEntriesByType('navigation');
     console.log('TTFB:', entry.responseStart - entry.requestStart);
   };
   

2. Custom metric reporting:

   const reportMetric = (name, value) => {
     if (navigator.sendBeacon) {
       const data = new Blob([JSON.stringify({name, value})], 
         { type: 'application/json' });
       navigator.sendBeacon('/analytics', data);
     }
   };
   

Continuous Integration Practices

CI/CD pipelines should be optimized for front-end characteristics.

Phased Build Process

# .gitlab-ci.yml example
stages:
  - lint
  - test
  - build
  - deploy

lint-job:
  stage: lint
  script:
    - npm run lint

test-job:
  stage: test
  script:
    - npm run test:ci

build-job:
  stage: build
  script:
    - npm run build
  artifacts:
    paths:
      - dist/

Cache Optimization

1. Cache node_modules:

   cache:
     key: ${CI_COMMIT_REF_SLUG}
     paths:
       - node_modules/
   

2. Parallel task execution:

   test-unit:
     script: npm run test:unit
     parallel: 3
   

Deployment Verification

1. Pre-release environment validation:

   # Compare build artifacts
   diff -qr dist/ preview-dist/
   

2. Health check endpoint:

   // healthcheck.js
   app.get('/health', (req, res) => {
     res.json({
       status: 'UP',
       version: process.env.npm_package_version
     });
   });