javascript - 如何通过滚动复制缩小效果

Question

如何复制 Apple 的 5k iMac 网站上使用的效果，向下滚动会产生缩小的效果？这是网站:

http://www.apple.com/imac-with-retina/

Answer 1

这将适用于大多数浏览器:

window.onmousewheel= function(e) {
  e.preventDefault();
  if((e.wheelDelta || -e.detail) < 1) {
    document.body.style.zoom--;
  }
  else {
    document.body.style.zoom++;
  }
}

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