Material UIでログインページを作成する。(デザインのみ)

[前回記事](https://qiita.com/kouji0705/items/dae7b924830ced8f7a3e)の続きです。

### 成果物
![スクリーンショット 2022-08-10 18.53.03.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/599049/c54644ae-0815-5c83-e42d-a60e62975c43.png)

### コード
```shell:ディレクトリ構成
~/develop/react/react_study/login$ tree -I node_modules 
.
├── README.md
├── package.json
├── public
│   ├── favicon.ico
│   ├── index.html
│   ├── logo192.png
│   ├── logo512.png
│   ├── manifest.json
│   └── robots.txt
├── src
│   ├── App.tsx
│   ├── components
│   │   ├── Header.tsx
│   │   └── Login.tsx
│   └── index.tsx
├── tsconfig.json
└── yarn.lock

3 directories, 14 files
```

```json:package.json
{
  "name": "login",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@emotion/react": "^11.10.0",
    "@emotion/styled": "^11.10.0",
    "@mui/icons-material": "^5.8.4",
    "@mui/material": "^5.10.0",
    "@testing-library/jest-dom": "^5.14.1",
    "@testing-library/react": "^13.0.0",
    "@testing-library/user-event": "^13.2.1",
    "@types/jest": "^27.0.1",
    "@types/node": "^16.7.13",
    "@types/react": "^18.0.0",
    "@types/react-dom": "^18.0.0",
    "react": "^18.2.0",
    "react-dom": "^18.2.0",
    "react-scripts": "5.0.1",
    "typescript": "^4.4.2",
    "web-vitals": "^2.1.0"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}

```

```tsx:App.tsx
import CssBaseline from "@mui/material/CssBaseline";
import { ThemeProvider, createTheme } from "@mui/material/styles";
import Header from "./components/Header";
import { Login } from "./components/Login";

function App() {
  const theme = createTheme({
    palette: {
      mode: "light",
    },
  });

  return (
    <ThemeProvider theme={theme}>
      <CssBaseline />
      <Header />
      <Login />
    </ThemeProvider>
  );
}

export default App;
```

```tsx:Login.tsx
import {
  Box,
  Button,
  Card,
  CardActions,
  CardContent,
  CardHeader,
  TextField,
} from "@mui/material";
import { memo } from "react";

export const Login = memo(() => {
  const cardStyle = {
    display: "block",
    transitionDuration: "0.3s",
    height: "450px",
    width: "400px",
    variant: "outlined",
  };

  return (
    <Box
      display="flex"
      alignItems="center"
      justifyContent="center"
      padding={20}
    >
      <Card style={cardStyle}>
        <CardHeader title="ログインページ" />
        <CardContent>
          <div>
            <TextField
              fullWidth
              id="username"
              type="email"
              label="Username"
              placeholder="Username"
              margin="normal"
            />
            <TextField
              fullWidth
              id="password"
              type="password"
              label="Password"
              placeholder="Password"
              margin="normal"
            />
          </div>
        </CardContent>
        <CardActions>
          <Button variant="contained" size="large" color="secondary">
            Login
          </Button>
        </CardActions>
      </Card>
    </Box>
  );
});
```