<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
</head>
<body>
</body>
<script>
    var multiKeyPress = {
        keyPressTimes: 0,
        // 2秒内5连击（默认）________________________
        trigger(
            multiKeyPressCallback,
            singleClickCallback,
            maxTimes = 5,
            time = 2000
        ) {
            this.keyPressTimes || (this.keyPressTimes = 0);
            ++this.keyPressTimes >= maxTimes &&
            (multiKeyPressCallback && multiKeyPressCallback(),
            singleClickCallback || (this.keyPressTimes = 0));
            this.keyPressTimes === 1 &&
            setTimeout(() => {
                this.keyPressTimes < maxTimes &&
                singleClickCallback &&
                singleClickCallback(); //执行单击键盘or少于maxTimes次数的点击
                this.keyPressTimes = 0;
            }, time);
        }
    };

    /*设置快捷键*/
    onkeyup = e => {
        var k = e.keyCode || e.which || e.charCode, ck = e.ctrlKey || e.metaKey, ak = e.altKey, sk = e.shiftKey;/*独立键*/
        if (k === 19) {/*按下Pause/Break键时候执行*/
            multiKeyPress.trigger(
                () => {
                    // 双击键盘
                    alert(`【更新时间】${versionTime}\n（注意校对是否已发布最新代码）`);
                },
                () => {
                    // 单击键盘
                    console.count();
                    console.log("单击Pause/Break键");
                }, 2, 300
            );
        }
    };
    var versionTime='2021年01月01日 00:00:00';
</script>
</html>