Newcomer onboarding process

Team collaboration standards and onboarding processes are indispensable in front-end development. Good collaboration standards improve code quality and development efficiency, while clear onboarding processes help newcomers integrate into the team quickly. The following sections expand on aspects such as code standards, toolchains, and communication mechanisms, with specific examples provided.

Code Standards and Style Guide

Teams should unify code styles to avoid maintainability issues caused by individual habit differences. The combination of ESLint + Prettier is recommended:

// .eslintrc.js example
module.exports = {
  extends: ['airbnb', 'prettier'],
  rules: {
    'react/jsx-filename-extension': [1, { extensions: ['.jsx', '.tsx'] }],
    'import/no-unresolved': 'off'
  }
};

// .prettierrc example
{
  "semi": false,
  "singleQuote": true,
  "tabWidth": 2
}

Specific standards should include:

• Component naming in PascalCase (e.g., UserProfile.tsx)
• Variable naming in camelCase
• CSS class names following the BEM convention (e.g., block__element--modifier)
• Direct modification of props is prohibited

Git Workflow Design

The Git Flow branching model is recommended:

# Feature development example
git checkout -b feature/user-auth develop
git commit -m "feat: add JWT authentication"
git push origin feature/user-auth

# Merge into develop branch via PR

Key rules:

1. The main branch only contains stable releases.
2. The develop branch serves as the integration testing branch.
3. Feature branches are prefixed with feature/.
4. Hotfix branches are prefixed with hotfix/.
5. Commit messages follow the Conventional Commits standard.

Project Scaffolding and Toolchain

Provide standardized project initialization scripts:

// create-project.js
const { execSync } = require('child_process')

const projectName = process.argv[2]
if (!projectName) {
  console.error('Please specify a project name')
  process.exit(1)
}

execSync(`npx create-react-app ${projectName} --template typescript`)
execSync(`cd ${projectName} && npm install -D eslint prettier husky lint-staged`)
console.log(`Project ${projectName} initialized successfully`)

Essential tools:

• Package manager: Yarn (v3+) or pnpm
• Build tool: Vite/Webpack
• Testing framework: Jest + Testing Library
• Documentation tool: Storybook/Docusaurus

Newcomer Onboarding Process

First-Week Task List

1. Environment Setup:

   • Node.js LTS version
   • Git SSH key configuration
   • IDE plugins (ESLint, Prettier, Stylelint)

2. Code Familiarization:

   git clone <repo-url>
   cd project && yarn install
   yarn run dev
   

3. Small Task Practice:

   • Modify styles of existing components
   • Add simple utility functions
   • Write unit test cases

Code Review Mechanism

PRs submitted by newcomers require two rounds of review:

1. Technical Review: Check code logic and implementation.
2. Standard Review: Verify compliance with code standards.

Review example:

- function getUser() {
+ function fetchUser() {
-   return axios.get('/user')
+   return apiClient.get('/user')
  }

Documentation System

Maintain the following documentation resources:

1. README.md - Quick start guide for the project.
2. ARCHITECTURE.md - Project architecture description.
3. CONTRIBUTING.md - Contribution guidelines.
4. TROUBLESHOOTING.md - Common issue solutions.

Documentation example:

## Styling Solution Selection Logic

1. Global styles: Use CSS Variables for theme colors.
   ```css
   :root {
     --primary: #1890ff;
   }

2. Component styles: CSS Modules + Sass.
3. Utility classes: Tailwind CSS.

## Continuous Integration and Automation

Configure GitHub Actions workflow:

```yaml
name: CI
on: [push, pull_request]

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - run: yarn install
      - run: yarn test --coverage
      - run: yarn build

Key checkpoints:

• Unit test coverage of at least 80%.
• Zero ESLint errors.
• Successful production build.
• Bundle size monitoring.

Technical Debt Management

Establish a technical debt board for categorization:

1. Must Fix: Security vulnerabilities, blocking bugs.
2. Recommended Optimizations: Code duplication, performance bottlenecks.
3. Long-Term Improvements: Architecture upgrades, dependency updates.

Example record format:

// TODO-TECH-DEBT: 2023-08-01
// Issue: Poor rendering performance of user list.
// Solution: Virtual scrolling.
// Priority: P2.
const UserList = () => {
  // Current implementation.
}

Cross-Team Collaboration Agreements

Interface standards for backend collaboration:

1. Defined using OpenAPI 3.0.
2. Frontend maintains a mock service.
3. Unified error code handling.

API request example:

// api/types.ts
interface APIResponse<T> {
  code: number
  data: T
  message?: string
}

// api/user.ts
export const getUserProfile = async (id: string) => {
  const res = await axios.get<APIResponse<User>>(`/api/users/${id}`)
  if (res.data.code !== 200) {
    throw new Error(res.data.message)
  }
  return res.data.data
}

Front-End Optimization Points

Performance optimization checklist:

1. Use WebP format for images.
2. Lazy-load components:

   const Editor = React.lazy(() => import('./MarkdownEditor'))
   

3. Inline critical CSS.
4. Load third-party libraries via CDN.

Emergency Handling Process

Production issue resolution steps:

1. Locate errors via Sentry.
2. Record reproduction paths.
3. Emergency rollback plan:

   git revert <commit-hash>
   git push origin main
   

4. Post-mortem meeting.

Knowledge Sharing Mechanism

Regularly organize:

1. Technical sharing sessions (monthly).
2. Code Review Workshops.
3. New technology research reports.
4. Problem-solving record library.

Sharing content example:

# 2023-07 Performance Optimization Practices

## Optimization Methods
1. Image lazy loading implementation.
   ```javascript
   new IntersectionObserver((entries) => {
     entries.forEach(entry => {
       if (entry.isIntersecting) {
         entry.target.src = entry.target.dataset.src
       }
     })
   })

2. Webpack chunking strategy optimization.