Test25

index.html

<div id="root"></div>

script.babel

function FancyBorder(props) {
  return (
    <div className={'FancyBorder FancyBorder-' + props.color}>
      {props.children}
    </div>
  );
}

function Dialog(props) {
  return (
    <FancyBorder color="blue">
      <h1 className="Dialog-title">
        {props.title}
      </h1>
      <p className="Dialog-message">
        {props.message}
      </p>
      {props.children}
    </FancyBorder>
  );
}

class SignUpDialog extends React.Component {
  constructor(props) {
    super(props);
    this.handleChange = this.handleChange.bind(this);
    this.handleSignUp = this.handleSignUp.bind(this);
    this.state = {login: ''};
  }

  render() {
    return (
      <Dialog title="Mars Exploration Program"
              message="How should we refer to you?">
        <input value={this.state.login}
               onChange={this.handleChange} />
        <button onClick={this.handleSignUp}>
          Sign Me Up!
        </button>
      </Dialog>
    );
  }

  handleChange(e) {
    this.setState({login: e.target.value});
  }

  handleSignUp() {
    alert(`Welcome aboard, ${this.state.login}!`);
  }
}

ReactDOM.render(
  <SignUpDialog />,
  document.getElementById('root')
);

scripts

<script src="https://unpkg.com/react/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom/umd/react-dom.development.js"></script>

style.css

.FancyBorder {
  padding: 10px 10px;
  border: 10px solid;
}

.FancyBorder-blue {
  border-color: blue;
}

.Dialog-title {
  margin: 0;
  font-family: sans-serif;
}

.Dialog-message {
  font-size: larger;
}

test25.markdown

Test25

Learn the fundamentals of React, including simple and class components, state, props, and submitting form data.

Composition

A Pen by 你银子掉了 on CodePen.