How i can display values on PIE chart in angular ? i am using ngx-echarts

This is my options for my echarts, i don't know where to add an options to display value of my data on the pie chart . or any indicators to display values without hover event.

 this.options = {
  backgroundColor: this.eTheme.bg,
  tooltip: {
    trigger: 'item',
    formatter: '{b} : {c}',
  },
  legend: {
    orient: 'vertical',
    left: 'left',
    data: [],
  },
  series: [
    {
      name: 'Users',
      type: 'pie',
      radius: '50%',
      center: ['50%', '70%'],
      data: [],
    },
  ],
};

my pie chart

There's no option to directly display the value on the chart, you'll have to use the label formatter to do this.

For example:

 this.options = {
  backgroundColor: this.eTheme.bg,
  tooltip: {
    trigger: 'item',
    formatter: '{b} : {c}',
  },
  legend: {
    orient: 'vertical',
    left: 'left',
    data: [],
  },
  series: [
    {
      name: 'Users',
      type: 'pie',
      label: {
          formatter: '{a|{a}}{abg|}\n{hr|}\n  {b|{b}：}{c}  {per|{d}%}  '
      },
      radius: '50%',
      center: ['50%', '70%'],
      data: [],
    },
  ],
};

You can adapt your formatter as you see fit.