Google图表区域图，如何避免图表中的颜色阴影

Question

[Google Area Charts **

This is "options" I used in my code.
var options = {
        // title: 'Company Performance',
        // hAxis: {title: 'Year',  titleTextStyle: {color: '#333'}},
        // vAxis: {minValue: 0}
        vAxis: { 
            format: '#',  
            gridlines: { count: 4},
          },
      };

**] 1

Answer 1

添加以下图表选项...

areaOpacity: 1