类型错误： 无法读取未定义的属性'legend' |角度 + ng2 图表

Question

尝试在Angular中显示ChartJS图表的示例数据时，我会得到TypeError: Cannot read property 'legend' of undefined。

我尝试使用不同的示例或图表类型，但是它一直在抛出此错误。

html：

<div class="chartwrapper">
  <canvas baseChart class="chart"
          [datasets]="arbarChartData"
          [labels]="arbarChartLabels"
          [options]="arbarChartOptions"
          [legend]="arbarChartLegend"
          [chartType]="arbarChartType">
  </canvas>
</div>

TS：

public arbarChartLabels: Label[] = ['2006', '2007', '2008', '2009', '2010', '2011', '2012'];
public arbarChartType = 'bar';
public arbarChartLegend = true;
public arbarChartData: ChartDataSets[] = [
  {data: [65, 59, 80, 81, 56, 55, 40], label: 'Series A'},
  {data: [28, 48, 40, 19, 86, 27, 90], label: 'Series B'}
];

Answer 1

从您的HTML中删除[legend]="arbarChartLegend"。

在TS中，arbarChartOptions: any = { legend: { display: true, labels: { fontColor: 'black' } }

Answer 2

对我来说，足以以：

来初始化空的 arbarChartOptions

public arbarChartLabels: Label[] = ['2006', '2007', '2008', '2009', '2010', '2011', '2012'];
public arbarChartType = 'bar';
public arbarChartLegend = true;
public arbarChartData: ChartDataSets[] = [
  {data: [65, 59, 80, 81, 56, 55, 40], label: 'Series A'},
  {data: [28, 48, 40, 19, 86, 27, 90], label: 'Series B'}
];
public arbarChartOptions: ChartOptions = {}

解决错误