具有ID的div将不接受任何事件处理程序JavaScript.没有jQuery

我正在将鼠标悬停在div上时试图暂停定时幻灯片播放

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

如果我在页面上的li内放onMouseOver =“ clearTimeout(playTime)”,它将暂停,所以我知道我的代码是正确的,它将无法在div上工作！另外,如果我摆脱了ID,当我将警报功能放入事件处理程序时,它将发出警报

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);
    }

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解决方法:

我会这样做：

(并且没有内联脚本…只是< div id =“ play_slide”>某事< / 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

标签：slideshow,event-handling,css,html,javascript
来源： https://codeday.me/bug/20191122/2059455.html