javascript tweenmax做倒计时的方法

javascript tweenmax做倒计时的方法

        <div class="p2_wrap1_wrap1"id="scoreDisplay">30.00</div>

  var demo = {
            score: 30
        },
        scoreDisplay = document.getElementById("scoreDisplay");
    //创建一个tween在20秒内改变score的属性值从0到100.
    var tween = TweenLite.to(demo, 30, {
        score: 0,
        onUpdate: showScore,
        onComplete:gameOver,
        ease: Linear.easeNone,
    })
    //在tween update时通过这个function输出.
    function showScore() {
        scoreDisplay.innerHTML = demo.score.toFixed(2);
    }
    function gameOver(){
        alert('游戏结束');
    }