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document.querySelectorAll('.title-group.-gantt').forEach(item => item.click())

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// https://www.typescriptlang.org/play?#code/PTAEjztRRNMTwzDu3RaOUKe6gdeQFAGMD2A7AzgF1AAUBTAJwFsBLXXKnXUAXlAG9VRQySBDAEwBcoAOTd+wgDQdQAdzJV8JIcLkKSk6SQAeJdAFdFy7boPrUAX1A9GWPPgDcqfAE8ADiWLlqtetmagXd0wAM09KGjoGAG0AaxJnEIC3EkTScJ8GAF17UBARMT5hUAAfEVVFItLhY30KoA

// typescript playgroud 工作，实际项目中不工作
const permissions = ['read', 'write', 'execute'] as const;
type Permission = typeof permissions[number]; // 'read' | 'write' | 'execute'

// typescript playgroud 不工作，实际项目中工作
const Permissions = {
  read: 'read',
  write: 'write',

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qs.stringify({ a: ['b', 'c'] }, { arrayFormat: 'indices' })
// 'a[0]=b&a[1]=c'
qs.stringify({ a: ['b', 'c'] }, { arrayFormat: 'brackets' })
// 'a[]=b&a[]=c'
qs.stringify({ a: ['b', 'c'] }, { arrayFormat: 'repeat' })
// 'a=b&a=c'
qs.stringify({ a: ['b', 'c'] }, { arrayFormat: 'comma' })
// 'a=b,c'

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type A {
 a: string,
}

type B {
 b: number
}

const data: A | B = { a: 'Hello' }

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Basic

1. 入门教程：认识 React https://reactjs.org/tutorial/tutorial.html
2. 重点理解 hooks API https://reactjs.org/docs/hooks-intro.html

Develop an App

1. 学习一种 Router https://reactrouter.com/

Learn for working in a team

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export const isDark = () => window.matchMedia('(prefers-color-scheme: dark)').matches;

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function isLeapYear(year: number) {
  return new Date(year, 1, 29).getDate() === 29
}

export default isLeapYear

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{
  "scripts": {
    "//start": "Start the app",
    "start": "react-scripts start",
    "//test": "Run unit tests",
    "test": "react-scripts test"
  }
}

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因为 Object props 在使用 defaultProps 容易出现错误。
因为 defaultProps 是替换，而不是合成。

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解决方法

1. 先删除文件，再加进去

```
git rm <filename>

git add <filename>

git add commit -m “rename file"