JavaScript 関数を使用してユーザー インタラクションと動的な効果を実現します

function changeColor() {
  var element = document.getElementById("myElement");
  element.style.color = "red";
}

function changeFontSize() {
  var element = document.getElementById("myElement");
  element.style.fontSize = "20px";
}

function changeBackground() {
  var element = document.getElementById("myElement");
  element.style.backgroundColor = "blue";
}

function showElement() {
  var element = document.getElementById("myElement");
  element.style.display = "block";
}

function hideElement() {
  var element = document.getElementById("myElement");
  element.style.display = "none";
}

function addElement() {
  var element = document.createElement("p");
  element.innerHTML = "这是新添加的元素";
  document.body.appendChild(element);
}

function removeElement() {
  var element = document.getElementById("myElement");
  document.body.removeChild(element);
}

function handleClick() {
  alert("点击事件被触发");
}

function handleMouseMove(event) {
  var x = event.clientX;
  var y = event.clientY;
  console.log("鼠标移动到坐标 (" + x + "," + y + ")");
}

var element = document.getElementById("myElement");
element.addEventListener("click", handleClick);
element.addEventListener("mousemove", handleMouseMove);

function fadeIn(element) {
  var op = 0.1;  // 初始透明度为0.1
  var timer = setInterval(function () {
    if (op >= 1) {
      clearInterval(timer);
    }
    element.style.opacity = op;
    element.style.filter = 'alpha(opacity=' + op * 100 + ")";
    op += op * 0.1;
  }, 10);
}

function scaleElement(element, scale) {
  var size = 100;  // 初始大小为100
  var timer = setInterval(function () {
    if (size >= 200) {
      clearInterval(timer);
    }
    element.style.transform = "scale(" + size / 100 + ")";
    size += 10;
  }, 100);
}