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              <p id="text">通知の許可をすると通知が表示されます!</p>
              let output = document.getElementById('text');

if (typeof Notification === 'undefined') {
    output.textContent = 'お使いのブラウザは Notifications API に対応していません。';

// ユーザーに通知の許可を求める
    (permission) => { 
        // ユーザーが通知を許可してくれなかったとき
        if (permission !== 'granted') {
            output.textContent = '通知をお届けできないのが残念です……';

        // 許可されていれば通知を作成して表示
        let notification = new Notification(
                body: 'クリックしていただけませんか?',
                icon: '//image.excite.co.jp/jp/woman/sp/common/apple-touch-icon.png'
        output.textContent = '通知が表示されましたか?';

        // 通知がクリックされたときになにかする
        notification.onclick = (e) => {
            output.textContent = 'ありがとうございます!';
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