Javascript/setInterval.html at master · ghithub/Javascript · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>setInterval test</title>
</head>
<body>
    <div>
        A count down timer using javascript setInterval.
    </div>
    <div id="status"></div>
    <script>
        var MyMod = (function () {

            // You can also put the coundDown function implementation inside the setInterval function call.
            function countDown(seconds) {
                var countDownId = setInterval(function () {
                    if (seconds > -1) {
                        document.getElementById("status").innerHTML = "Time left: " + seconds;
                        seconds--;
                    }
                    else {
                        clearInterval(countDownId);
                        console.log("seconds:", seconds);
                    }
                }, 1000);
            }

            return {
                countDown: countDown,
            }
        })();

        MyMod.countDown(5);
    </script>
</body>
</html>