React

by jonahe

HTML

<div id="app"></div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

.done {
  color: rgba(0, 0, 0, 0.3);
  text-decoration: line-through;
}

input {
  margin-right: 5px;
}

JavaScript 1.7

class SimpleTabs extends React.Component {
  constructor(props) {
    super(props);

    this.state = {
      selectedButton: false,
      value: 0
    };

    // const classes = useStyles();
    // const [value, setValue] = React.useState(0);
  }

  handleChange = (event, newValue) => {
    // const classes = useStyles();
    console.log("handleChange--->");
    const [value, setValue] = React.useState(0);
    setValue(newValue);
  };

  render() {
    //const classes = useStyles();
    const { classes } = this.props;
    //  const [value, setValue] = React.useState(0);

    return (
      <div>
          <div  onChange={this.handleChange}>
            <Tab label="Item One" />
            <Tab label="Item Two" />
            <Tab label="Item Three" />
          </div>
        {this.state.value === 0 && <h1>Item One</h1>}
        {this.state.value === 1 && <h1>Item Two</h1>}
        {this.state.value === 2 && <h1>Item Three</h1>}
      </div>
    );
  }
}
ReactDOM.render(<SimpleTabs />, document.querySelector("#app"))