I want to make a Countdown Stopwatch

Question

I want to make a countdown Stop watch in which I can define time and it reduce to 0:00 in which I am having 3 button i.e Start, Stop, Reset.

Can anyone help I Searched many website's but did't get the thing I want.

Answer 1

try this hope work for you

var CCOUNT;
$(document).ready(function () {
    $('#btnct').click(function () {
        CCOUNT = $('#seconds').val();
        cdreset();
    });
});
var t, count;

function cddisplay() {
    document.getElementById('timespan').innerHTML = count;
}

function countdown() {
    // starts countdown
    cddisplay();
    if (count === 0) {
        // time is up
    } else {
        count--;
        t = setTimeout(countdown, 1000);
    }
}

function cdpause() {
    // pauses countdown
    clearTimeout(t);
}

function cdreset() {
    // resets countdown
    cdpause();
    count = CCOUNT;
    cddisplay();
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>

<form id="frm">Seconds:
    <input type="text" id="seconds" name="seconds" value="0" size="2" maxlength="2" />
    <br/>
    <input type="button" id="btnct" value="Input" />
</form>
<span id="timespan"></span>

<input type="button" value="Start" onclick="countdown()">
<input type="button" value="Stop" onclick="cdpause()">
<input type="button" value="Reset" onclick="cdreset()">