chart.js - Supplied parameters do not match any signature of call target (angular2)

Question

I am using chart.js version 2.2.1 in my angular 2 app.

When call the constructor of Chart an error is displayed:
Supp

Answer 1

To resolve the problem listed in question:

---

Q:
When call the constructor of Chart an error is displayed:

• Supplied parameters do not match any signature of call target.

• And npm start command does not compile the app.

---

for the setup (angular2-rc4, chart.js-2.2.1),
In the component where the Chart is instantiated declare the global variable Chart: declare var Chart: any;

The whole code is bellow:

import { Component, Input, Output, 
         EventEmitter, ElementRef, 
         Inject, AfterViewInit} from '@angular/core';


declare var Chart: any; //THIS LINE resolves the problem listed in question!!! 


@Component({
    selector: 'my-chart',  
    template: `<canvas height="{{chartHeight}}"></canvas>`,
    styles: [`:host { display: block; }`]
})

export class LinearChartDirective implements AfterViewInit {
    @Input() chartData: Array<any>;
    @Input() chartXAxisLabels: Array<any>;

    @Input() showLegend: boolean;
    @Input() legendLabel: string;
    @Input() chartHeight: number;

    chart: any;

    constructor( @Inject(ElementRef) private element: ElementRef) {    }

    ngAfterViewInit() {        
        let context = this.element.nativeElement.children[0].getContext('2d');
        this.createChart(ctx);
    }

    createChart(ctx: CanvasRenderingContext2D) {    
        if(!this.chartData)
            return;

        let data = {
            labels: this.chartXAxisLabels,
            datasets: [{
                label: this.legendLabel,
                data: this.chartData,

                backgroundColor: ['rgba(54, 162, 235, 0.2)'],
                borderColor: ['rgba(54, 162, 235, 1)'],
                borderWidth: 1,
                lineTension: 0, // set to 0 means - No bezier

                pointBorderColor: "rgba(75,192,192,1)",
                pointBackgroundColor: "#fff",
                pointBorderWidth: 1,
                pointHoverRadius: 5,
                pointHoverBackgroundColor: "rgba(75,192,192,1)",
                pointHoverBorderColor: "rgba(220,220,220,1)",
                pointHoverBorderWidth: 2,
                pointRadius: 2,
                pointHitRadius: 10
            }]
        };

        let chartOptions = {           
            legend: { display: this.showLegend !== undefined ? this.showLegend : false },

            responsive: true,
            maintainAspectRatio: true,
            scales: { yAxes: [{ ticks: { beginAtZero: true } }] }
        };

        //next line is no more complaining about "Supplied parameters..."
        this.chart = new Chart(ctx, { type: 'line', data: data, options: chartOptions });
    }  
}