Function play

stopwatch/app.js:42–49

()

}

function play(){
    startTime = Date.now() - elapsedTime;
    timerInterval = setInterval(function printTime(){
        elapsedTime = Date.now() - startTime;
        displayInTimer(timeToString(elapsedTime));
    },10);
    toggleButtons("PAUSE");
}

function pause(){
    clearInterval(timerInterval);