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References

minImposta il valore numerico o temporale minimo per un elemento input
<ol>Crea liste ordinate o numerate.
langSpecifica la lingua del contenuto di un elemento
formnovalidateImpedisce la convalida di un singolo elemento input
maxImposta il valore numerico o temporale massimo per un elemento input
animationDefinisce i parametri dell'animazione di un elemento o selettore

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Add React in One Minute</title>
  </head>
  <body>

    <h2>Add React in One Minute</h2>
    <p>This page demonstrates using React with no build tooling.</p>
    <p>React is loaded as a script tag.</p>

    <p>
      This is the first comment.
      <!-- We will put our React component inside this div. -->
      <div class="like_button_container" data-commentid="1"></div>
    </p>

    <p>
      This is the second comment.
      <!-- We will put our React component inside this div. -->
      <div class="like_button_container" data-commentid="2"></div>
    </p>

    <p>
      This is the third comment.
      <!-- We will put our React component inside this div. -->
      <div class="like_button_container" data-commentid="3"></div>
    </p>

const e = React.createElement;

class LikeButton extends React.Component {
  constructor(props) {
    super(props);
    this.state = { liked: false };
  }

  render() {
    if (this.state.liked) {
      return 'You liked comment number ' + this.props.commentID;
    }

    return e(
      'button',
      { onClick: () => this.setState({ liked: true }) },
      'Like'
    );
  }
}

// Find all DOM containers, and render Like buttons into them.
document.querySelectorAll('.like_button_container')
  .forEach(domContainer => {
    // Read the comment ID from a data-* attribute.
    const commentID = parseInt(domContainer.dataset.commentid, 10);
    ReactDOM.render(
      e(LikeButton, { commentID: commentID }),
      domContainer
    );
  });