javascript特效代码大全

【JavaScript特效代码大全】

1、淡入淡出效果

function fadeIn(element, duration) {
  var op = 0.1;  // 初始透明度
  var timer = setInterval(function () {
    if (op <= 1){
      element.style.opacity = op;
      element.style.filter = 'alpha(opacity=' + op * 100 + ")";
      op += op * 0.1;
    }
    else clearInterval(timer);
  }, duration);
}
function fadeOut(element, duration) {
  var op = 1;  // 初始透明度
  var timer = setInterval(function () {
    if (op >= 0){
      element.style.opacity = op;
      element.style.filter = 'alpha(opacity=' + op * 100 + ")";
      op = op * 0.1;
    }
    else clearInterval(timer);
  }, duration);
}

2、滚动字幕效果

function marquee(element, direction, speed) {
  direction = direction || "left";
  speed = speed || 5;
  var text = element.innerHTML;
  var position = element.offsetWidth;
  var intervalId = setInterval(function () {
    if (direction === "left") {
      position;
      if (position < text.length) {
        position = element.offsetWidth;
      }
    } else {
      position++;
      if (position > element.offsetWidth) {
        position = text.length;
      }
    }
    element.innerHTML = text + text.substring(position, position + text.length);
  }, speed);
}

3、鼠标跟随效果

function followMouse(element, duration) {
  var mouseX = 0, mouseY = 0;
  var intervalId = setInterval(function () {
    mouseX = event.clientX element.offsetLeft;
    mouseY = event.clientY element.offsetTop;
    element.style.left = mouseX + 'px';
    element.style.top = mouseY + 'px';
  }, duration);
}

4、图片轮播效果

var index = 0; // 当前显示的图片索引，从0开始计数
var images = document.getElementsByTagName('img'); // 获取所有图片元素，存储在数组中
var length = images.length; // 图片数量，即数组长度
var timer = null; // 定时器变量，用于控制图片切换时间间隔和动画效果的执行次数
var intervalTime = 3000; // 图片切换的时间间隔，单位为毫秒（ms）