javascript - 带有 id 的 div 不接受任何事件处理程序 JavaScript。没有Jquery

Question

我试图在您将鼠标悬停在 div 上时暂停定时幻灯片

    <div id="play_slide" onMouseOver="clearTimeout(playTime)"></div>

如果我将 onMouseOver="clearTimeout(playTime)" 放在页面上的 li 中，它会暂停，所以我知道我的代码是正确的，它不会在 div 上工作!此外，如果我去掉 id，当我将警报函数放入事件处理程序时它会发出警报

这是js。

    var playTime;

    function playSlide()
    {
      var slideshow = document.getElementById("play_slide").style;
      var images = new Array("an", "complete", "red", "thirteen");
      indexPlay++;
      if(indexPlay > images.length - 1)
      {
          indexPlay = 0;
      }
      slideshow.backgroundImage = "url('assets/images/play/"+images[indexPlay]+".png')";

      playTime = setTimeout("playSlide()", 2500);
    }

你可以在这里看到这个:www.nicktaylordesigns.com/work.html

Answer 1

我会这样做:

(并且没有内联脚本...只是 <div id="play_slide">Something</div> )

var playTime;
var indexPlay = 0;
var slideElement;
window.onload = function () {
    slideElement = document.getElementById("play_slide");
    slideElement.addEventListener('mouseenter', function () {
        console.log('stop');
        clearTimeout(playTime);
    });
    slideElement.addEventListener('mouseleave', function () {
        console.log('continue');
        playTime = setTimeout(playSlide, 2500);
    });
    playSlide();
}

function playSlide() {
    var slideshow = slideElement.style;
    var images = new Array("an", "complete", "red", "thirteen");
    indexPlay++;
    if (indexPlay > images.length - 1) {
        indexPlay = 0;
    }
    slideshow.backgroundImage = "url('assets/images/play/" + images[indexPlay] + ".png')";
    playTime = setTimeout(playSlide, 2500);
}

Fiddle