import { Component } from '@angular/core'; import { jqxBulletChartComponent } from 'jqwidgets-scripts/jqwidgets-ts/angular_jqxbulletchart'; @Component({ selector: 'app-root', templateUrl: './app.component.html' }) export class AppComponent { pointsToGrade(points: number): string { let grade; if (points < 60) { grade = 'E'; } else if (points < 70) { grade = 'D'; } else if (points < 80) { grade = 'C'; } else if (points < 90) { grade = 'B'; } else { grade = 'A'; } return grade; }; tooltipFormatFunction = (value: number, target: number): string => { let currentGrade = this.pointsToGrade(value); let averageGrade = this.pointsToGrade(target); return '