基于Bootstrap5实现的响应式毫秒计时器秒表

使用方法

let startTime;
        let accumulatedTime = 0;
        let running = false;

        function startStop() {
            if (running) {
                running = false;
            } else {
                startTime = null;
                requestAnimationFrame(updateTime);
                running = true;
            }
        }

        function reset() {
            accumulatedTime = 0;
            updateDisplay();
            running = false;
        }

        function updateTime(timestamp) {
            if (!startTime) {
                startTime = timestamp;
            }

            if (!running) return;

            accumulatedTime = timestamp - startTime;
            updateDisplay();

            requestAnimationFrame(updateTime);
        }

        function updateDisplay() {
            const totalMilliseconds = Math.floor(accumulatedTime);
            const days = Math.floor(totalMilliseconds / (24 * 60 * 60 * 1000));
            const hours = Math.floor((totalMilliseconds % (24 * 60 * 60 * 1000)) / (60 * 60 * 1000));
            const minutes = Math.floor((totalMilliseconds % (60 * 60 * 1000)) / (60 * 1000));
            const seconds = Math.floor((totalMilliseconds % (60 * 1000)) / 1000);
            const milliseconds = totalMilliseconds % 1000;

            const timeString = `${formatTime(days)}:${formatTime(hours)}:${formatTime(minutes)}:${formatTime(seconds)}:${formatTime(milliseconds, 3)}`;
            document.getElementById('stopwatch').innerText = timeString;
        }

        function formatTime(value, digits = 2) {
            const paddedValue = value.toString().padStart(digits, '0');
            return paddedValue.substring(0, digits);
        }

        // Add event listener to stop the stopwatch on any touch
        $(document).on('touchstart', function () {
            running = false;
        });

        // Initial display
        updateDisplay();