4👍
After 2 hours I got the answer
add the circle code before adding the text
this.chart.ctx.beginPath();
this.chart.ctx.arc(x,y,80,0,2*Math.PI);
this.chart.ctx.fillStyle = '#8AC007';
this.chart.ctx.fill();
this.chart.ctx.lineWidth = 5;
this.chart.ctx.strokeStyle = '#003300';
this.chart.ctx.stroke();
this.chart.ctx.fillStyle = 'blue';
this.chart.ctx.fillText("Text", x + x_fix, y + y_fix);
result will be like above image
Source:stackexchange.com