ngx-chart-area-chart-stacked 中的线性渐变

Question

如何在 colorScheme = { domain: [linear-gradient(to left, rgba(9, 174, 161, 0.5) 100%, #09aea1 50%, rgba(9, 174, 161, 0.5) 0%) ]？ }; 使用 Angular 5 和 ngx-charts-area-chart-stacked。

这是图表链接

<ngx-charts-area-chart-stacked
  [view]="view"
  [scheme]="colorScheme"
  [legend]="legend"
  [showXAxisLabel]="showXAxisLabel"
  [showYAxisLabel]="showYAxisLabel"
  [xAxis]="xAxis"
  [yAxis]="yAxis"
  [timeline]="timeline"
  [results]="multi"
  (select)="onSelect($event)">
</ngx-charts-area-chart-stacked>

multi: any[] = [];
view: any[] = [450, 120];

// options
legend: boolean = false;
showLabels: boolean = true;
animations: boolean = true;
xAxis: boolean = true;
yAxis: boolean = true;
showYAxisLabel: boolean = false;
showXAxisLabel: boolean = false;
timeline: boolean = true;

colorScheme = {
  domain: ['#09aea1']
};