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Angular Line Chart with Data from JSON / AJAX

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Example shows Angular Line Chart with Data being read from JSON using AJAX (http.get).

  • Component Code
  • HTML Code
/* app.component.ts */
import { Component, AfterViewInit } from '@angular/core';
import { CommonModule } from '@angular/common';
import { RouterOutlet } from '@angular/router';
import { HttpClientModule, HttpClient } from '@angular/common/http';

import { CanvasJSAngularChartsModule } from '@canvasjs/angular-charts';

@Component({
	selector: 'app-root',
	templateUrl: './app.component.html',
    standalone: true,
    imports: [CommonModule, RouterOutlet, HttpClientModule, CanvasJSAngularChartsModule]
})
	
export class AppComponent implements AfterViewInit {
  dataPoints:any = [];
  chart:any;
  
  constructor(private http : HttpClient) {  
  }
  
  chartOptions = {
    theme: "light2",
    zoomEnabled: true,
    exportEnabled: true,
    title: {
      text:"Bitcoin Closing Price"
    },
    subtitles: [{
      text: "Loading Data...",
      fontSize: 24,
      horizontalAlign: "center",
      verticalAlign: "center",
      dockInsidePlotArea: true
    }],
    axisY: {
      title: "Closing Price (in USD)",
      prefix: "$"
    },
    data: [{
      type: "line",
      name: "Closing Price",
      yValueFormatString: "$#,###.00",
      xValueType: "dateTime",
      dataPoints: this.dataPoints
    }]
  }
  
  getChartInstance(chart: object) {
    this.chart = chart;
  }
  
  ngAfterViewInit() {
    this.http.get('https://canvasjs.com/data/gallery/angular/btcusd2021.json', { responseType: 'json' }).subscribe((response: any) => {
      let data = response;
      for(let i = 0; i < data.length; i++){
        this.dataPoints.push({x: new Date(data[i].date), y: Number(data[i].close) });
      }
      this.chart.subtitles[0].remove();
    });
  }
}                              
<div>
	<canvasjs-chart [options]="chartOptions" [styles]="{width: '100%', height:'360px'}" (chartInstance)="getChartInstance($event)"></canvasjs-chart>
</div>                        

Chart Customizations

prefix property of the axis can be used to set prefixes in the axis labels. Zooming & Panning can be enabled by setting zoomEnabled property. Some other customizations include toolbar, risingColor, fallingColor etc.

Note   For step by step instructions, follow our Angular Integration Tutorial

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