js利用setInterval() clearInterval()函数实现轮播图效果的代码

Sure, here is an example of implementing a slideshow with setInterval() and clearInterval() functions in JavaScript:

First, set up an array of image sources and a variable to keep track of the current index:

var images = ['image1.jpg', 'image2.jpg', 'image3.jpg'];
var currentIndex = 0;

Then, define a function to update the image every few seconds using setInterval():

function startSlideshow() {
  setInterval(function() {
    currentIndex++;
    if (currentIndex >= images.length) {
      currentIndex = 0;
    }
    document.getElementById('slideshow').src = images[currentIndex];
  }, 3000);
}

Finally, to stop the slideshow, use clearInterval() and pass in the interval ID returned by setInterval():

var intervalId = startSlideshow(); // start the slideshow and save the interval ID
clearInterval(intervalId); // stop the slideshow

Note: This is just an example and there are many ways to implement a slideshow in JavaScript. Also, please let me know if you have any further questions!