javascript - 从缩略图切换新图像后，缩放仍显示原始图像

Question

我使用来自 w3schools 的图像缩放，代码如下:

function imageZoom(imgID, resultID) {
  var img, lens, result, cx, cy;
  img = document.getElementById(imgID);
  result = document.getElementById(resultID);
  lens = document.createElement("DIV");
  lens.setAttribute("class", "img-zoom-lens");
  img.parentElement.insertBefore(lens, img);
  cx = result.offsetWidth / lens.offsetWidth;
  cy = result.offsetHeight / lens.offsetHeight;
  result.style.backgroundImage = "url('" + img.src + "')";
  result.style.backgroundSize = (img.width * cx) + "px " + (img.height * cy) + "px";
  lens.addEventListener("mousemove", moveLens);
  img.addEventListener("mousemove", moveLens);
  lens.addEventListener("touchmove", moveLens);
  img.addEventListener("touchmove", moveLens);
  result.style.display = "none";

  function moveLens(e) {
    var pos, x, y;
    e.preventDefault();
    pos = getCursorPos(e);
    x = pos.x - (lens.offsetWidth / 2);
    y = pos.y - (lens.offsetHeight / 2);
    if (x > img.width - lens.offsetWidth) {x = img.width - lens.offsetWidth;}
    if (x < 0) {x = 0;}
    if (y > img.height - lens.offsetHeight) {y = img.height - lens.offsetHeight;}
    if (y < 0) {y = 0;}
    lens.style.left = x + "px";
    lens.style.top = y + "px";
    result.style.backgroundPosition = "-" + (x * cx) + "px -" + (y * cy) + "px";
  }

  function getCursorPos(e) {
    var a, x = 0, y = 0;
    e = e || window.event;
    a = img.getBoundingClientRect();
    x = e.pageX - a.left;
    y = e.pageY - a.top;
    x = x - window.pageXOffset;
    y = y - window.pageYOffset;
    return {x : x, y : y};
  }
}

imageZoom("myimage", "myresult");

我使用以下简单代码来切换图像:

function change_img(img_src) {
  document.getElementsByName("goods_img")[0].src=img_src;
}

我的网址: https://cn.angelcorp.net/shop/goods.php?id=9
您可以单击带有标志的缩略图，但缩放仍然显示没有标志的原始图像。
谢谢你。

Answer 1

你必须改变myresult的背景到img_src也是。
把函数改成这个

function change_img(img_src) {
document.getElementsByName("goods_img")[0].src=img_src;
document.getElementById("myresult").style = `background-image: url("${img_src}"); background-size: 468.846px 468.846px; display: none; background-position: -256.846px -256.846px;`;
}