stopwatch/main.js at main · nyvnge/stopwatch · GitHub

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var stopwatch = document.getElementById("stopwatch");
var startBtn = document.getElementById("start-btn");
var timeoutId = null;
var ms = 0;
var sec = 0;
var min = 0;

// Function to start stopwatch

function start(flag){
    if (flag){
        startBtn = true;
    }
    timeoutId = setTimeout(function(){
        ms = parseInt(ms);
        sec = parseInt(sec);
        min = parseInt(min);

        ms++;

        if (ms == 100){
            sec = sec + 1;
            ms = 0;
        }
        if (sec == 60){
            min == min + 1;
            sec = 0;
        }
        if (ms < 10){
            ms = '0' + ms;
        }
        if (sec < 10){
            sec = '0' + sec;
        }
        if (min < 10){
            min = '0' + min;
        }

        stopwatch.innerHTML = min + ':' + sec + ':' + ms;
        start();
    }, 10); // delay time 10 ms
}

// Function to pause stopwatch
function pause(){
    clearTimeout(timeoutId);
    startBtn.disabled = false;
}

// Function to reset stopwatch
function reset(){
    ms = 0;
    sec = 0;
    min = 0;
    clearTimeout(timeoutId);
    stopwatch.innerHTML = '00:00:00';
    startBtn.disabled = false;
}