تمرین Class Component

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <style>
      .container {
        max-width: 300px;
        display: flex;
        flex-direction: column;
        margin: 0 auto;
      }
      #todo-app {
        margin: 1em;
        text-align: center;
      }
      #todo-list,
      #todo-stats {
        margin: 1em auto;
        text-align: left;
        width: 450px;
      }
      #todo-list {
        list-style: none;
        padding: 0;
      }
      #todo-stats {
        color: #777;
      }
      #new-todo {
        border-radius: 5px;
      }
      .todo-input {
        display: block;
        font-family: Helvetica, sans-serif;
        font-size: 20px;
        line-height: normal;
        margin: 5px auto 0;
        padding: 6px;
        width: 420px;
      }
      .todo-label {
        color: #444;
        font-size: 20px;
        font-weight: bold;
        text-align: center;
      }
    </style>
  </head>
  <body>
    <!-- <div class="container">
      <div id="todo-app">
        <label class="todo-label" for="new-todo"
          >What do you want to do today?</label
        >
        <input
          type="text"
          id="new-todo"
          class="todo-input"
          placeholder="type your tasks"
        />
      </div>
      <div class="todo-list">
        <div class="todo-item">
          <input type="checkbox" />
          <span class="todo-content">task 1</span>
        </div>
      </div>
    </div> -->
    <div id="root"></div>
    <script
      crossorigin
      src="https://unpkg.com/react@18/umd/react.development.js"
    ></script>
    <script
      crossorigin
      src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"
    ></script>
    <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
    <script type="text/babel">
      class TodoApp extends React.Component {
        render() {
          return (
            <div id="todo-app">
              <label className="todo-label" htmlFor="new-todo">
                What do you want to do today?
              </label>
              <input
                type="text"
                id="new-todo"
                className="todo-input"
                placeholder="type your tasks"
              />
            </div>
          );
        }
      }
      class TodoList extends React.Component {
        render() {
          return (
            <div className="todo-list">
              <div className="todo-item">
                <input type="checkbox" />
                <span className="todo-content">task 1</span>
              </div>
            </div>
          );
        }
      }
      class Container extends React.Component {
        render() {
          return (
            <div className="container">
              <TodoApp />
              <TodoList />
            </div>
          );
        }
      }
      const $root = ReactDOM.createRoot(document.getElementById("root"));
      $root.render(<Container />);
    </script>
  </body>
</html>