按钮的单双击事件

js代码：

<script type="text/javascript">
        let clickNotes = 0;
        let timeover = null;
        function back() {
            clickNotes++;
            if (timeover) clearTimeout(timeover);
              
            timeover = setTimeout(() => {
                if (clickNotes == 1) {
                    // do something 点击一次触发
                    console.log(-1);
                    window.history.go(-1);
                } else {
                    // do something 点击两次触发
                    console.log('关闭');
                    window.close();
                }
                timeover = null;
                clickNotes = 0;
            }, 1000);
        }
    </script>