I have api fetch number datas which in json format and I put them in an array. I am showing dataLabelArray and dataArray in a line charts(chart.js). But I couldn't add to the numbers the commas. When I add the comma json format chart isn't showing. I tried to the use number formatting pipes but I didn' get any result. I have dataArray like ['4311185.190000001','12222280.9699999995','1879801.44','1745724.279999999'] I want to array like ['4,311,185.190000001','12,222,280.9699999995','1,879,801.44','1,745,724.279999999'] POSTMAN RESULT service.ts getTopProjects():Observable<any[]>{ return this.http.get<any>(this.APIUrl+'/..../GetProjects') } component.ts import { Component, OnDestroy, OnInit } from '@angular/core'; import { Data } from '@angular/router'; import { NbThemeService, NbColorHelper } from '@nebular/theme'; import { SharedService } from '../../../@core/utils/shared.service'; import { Chart } from 'chart.js'; @Component({ selector: 'ngx-chartjs-bar-horizontal', template: `<canvas id="barProjectcanvas"></canvas>`, }) export class ChartjsBarHorizontalComponent implements OnDestroy,OnInit { options: any; data: Data[]; dataLabelProject = []; dataArrayProjectProfit = []; chart = []; themeSubscription: any; constructor(private service: SharedService,private theme: NbThemeService) {} ngOnInit():void{ this.themeSubscription = this.theme.getJsTheme().subscribe(config => { const colors: any = config.variables; const chartjs: any = config.variables.chartjs; this.service.getTopProjects().subscribe((result: Data[]) => { result.forEach(x => { this.dataLabelProject.push(x.PROJE_KODU); this.dataArrayProjectProfit.push(x.TUTAR); }); this.chart = new Chart('barProjectcanvas',{ type: 'bar', data:{ labels:this.dataLabelProject, datasets: [{ label: 'Projects', backgroundColor: NbColorHelper.hexToRgbA(colors.successLight, 0.8), borderColor: colors.success, data: this.dataArrayProjectProfit, }], }, options : { responsive: true, maintainAspectRatio: false, elements: { rectangle: { borderWidth: 2, }, }, scales: { xAxes: [ { gridLines: { display: true, color: chartjs.axisLineColor, }, ticks: { fontColor: chartjs.textColor, }, }, ], yAxes: [ { gridLines: { display: false, color: chartjs.axisLineColor, }, ticks: { fontColor: chartjs.textColor, }, }, ], }, legend: { position: 'top', labels: { fontColor: chartjs.textColor, }, }, }, }); }); }); } ngOnDestroy(): void { this.themeSubscription.unsubscribe(); } } Output Chart I want to add commas yaxislabel and the datas. Thank you in advance ! Continue reading...