在jquery中更改多个div位置

你的代码是一个字符串.你需要它是正常的JS.;)

    $(this).css("left", Math.floor( Math.random() * widthMax ));
    $(this).css("top", Math.floor( Math.random() * heightMax ));

$(function() {
  var docHeight = $(window).height(),
    docWidth = $(window).width(),
    $div = $('.randomSpawn'),
    divWidth = $div.width(),
    divHeight = $div.height(),
    heightMax = docHeight - divHeight,
    widthMax = docWidth - divWidth;
  $div.each(function() {
    $(this).css("left", Math.floor( Math.random() * widthMax ));
    $(this).css("top", Math.floor( Math.random() * heightMax ));
  });
});

.randomSpawn {
  position: fixed;
  background-color: black;
  display: block;
  top: 0;
  left: 0;
  width: 100px;
  height: 100px;
}