google 图表栏阴影

google charts bar shadows

当我将鼠标悬停在图表中的条形图时,有没有办法去除阴影?我可以在工具提示上这样做,但还没有找到在栏本身上这样做的方法。在这种情况下,蓝色或红色条本身...

我想如果可能的话,这需要在 css 完成? 函数 drawBasic() {

var data = google.visualization.arrayToDataTable([
    ['City', '2010 Population','j'],
    ['New York City, NY', 80,10],
    ['Los Angeles, CA', 80,0],
    ['Chicago, IL', 70,0],
    ['Houston, TX', 65,0],
    ['Philadelphia, PA', 17,0]
  ]);
    var num = 0;


  var options = {
    title: 'Percent of students enrolled',
    chartArea: {width: '50%'},
    hAxis: {
      title: 'Percentage',
      minValue: 100
    },
    vAxis: {
      title: 'college location'
    },
      isStacked: true
  };

https://jsfiddle.net/skinnyb/33og516L/3/

这个css规则似乎有效:

rect[stroke-opacity]{
   stroke-width:0 !important;
}

https://jsfiddle.net/kghv82yc/