JS Timer

by Rajesh Dixit

HTML

<div> <span id="lblhr">00</span>
: <span id="lblmin">00</span>
: <span id="lblsec">00</span>

</div>
<button onclick="startTimer()">Start</button>
<button onclick="endTimer()">Stop</button>

JavaScript

function timer() {
    var time = {
        sec: 00,
        min: 00,
        hr: 00
    }
    var max = 59;
    var interval = null;

    function update(str) {
        time[str]++;
        time[str] = time[str] % 60;
        if (time[str] == 0) {
            str == "sec" ? update("min") : update("hr");
        }
        print(str);
    }

    function print(str) {
        var _time = time[str].toString().length == 1 ? "0" + time[str] : time[str];
        document.getElementById("lbl" + str).innerHTML = _time;
    }

    function initInterval() {
        interval = setInterval(function () {
            update("sec");
        }, 1000);
    }

    function stopTimer() {
        clearInterval(interval);
    }

    return {
        'init': initInterval,
            'stop': stopTimer
    }
};

var time = new timer();

function startTimer() {
    time.init();
}

function endTimer() {
    time.stop();
}