window.onload = () => {
    let oBtn = document.getElementById('btn')

    oBtn.addEventListener('click', () => {
        let option = {
            title: '啦啦啦',
            body: 'ok,哈哈哈哈',
            icon: 'c.png'
        }

        let mayNotification = new window.Notification(option.title, option)

        mayNotification.onclick = () => {
            alert("点击了消息页卡")
        }
    })
}