ngx-chart error "TypeError: Object(...) is not a function" - angular5

Question

I am trying to implements some statistics in my develepping platform and I try to use ngx-charts to display them. However I get an error and I can't figure out why.
I am using storedProcedures for MySQL statistics which I call from Java Restful Backend and return them in Angular 5 front-end. The returned table has the following two fields: Date and number of incidents per day. So the table returned by the backend has those two columns.
My code for the component rendering the chart is the following:
import {Component, OnInit} from '#angular/core';
import {StatisticsService} from '../../statistics.service';
class Data {
private _name: string;
private _value: number;
get name(): string {
return this._name;
}
set name(value: string) {
this._name = value;
}
get value(): number {
return this._value;
}
set value(value: number) {
this._value = value;
}
}
#Component({
selector: 'app-daily-incidents-statistics',
templateUrl: './daily-incidents-statistics.component.html',
styleUrls: ['./daily-incidents-statistics.component.css']
})
export class DailyIncidentsStatisticsComponent implements OnInit {
view: any[] = [700, 400];
data: any[] = [];
// options
showXAxis = true;
showYAxis = true;
gradient = false;
showLegend = false;
showXAxisLabel = true;
xAxisLabel = 'Ημέρα';
showYAxisLabel = true;
yAxisLabel = 'Αρ. Περιστατικών';
constructor(private statisticsService: StatisticsService) {
// Object.assign(this, { single })
// Object.assign(this, { data } );
}
colorScheme = {
domain: ['#5AA454', '#A10A28', '#C7B42C', '#AAAAAA']
};
onSelect(event) {
console.log(event);
}
async ngOnInit() {
console.log('NG ON INIT EXECUTION');
await this.getIncidentsByDay();
}
getIncidentsByDay() {
this.statisticsService.getIncidentsByDay()
.subscribe(
(results) => {
let temp = new Data();
for (let i in results) {
console.log(results[i][0] + '>>=====>> ' + results[i][1]);
temp.name = results[i][0];
temp.value = results[i][1];
this.data.push(temp);
}
const test = this.data;
// for (let i = 0; i < this.data.length; i++) {
// console.log('wtf: ' + this.data[i][0] + '::::' + this.data[i][1]);
// }
// console.log(results);
// console.log(JSON.stringify(results));
// Object.assign(this, {test});
}
);
}
}
However when I run the above code I get in JavaScript console the error:
ERROR TypeError: Object(...) is not a function
at BarVerticalComponent../src/common/base-chart.component.ts.BaseChartComponent.bindWindowResizeEvent (index.js:7818)
at BarVerticalComponent../src/common/base-chart.component.ts.BaseChartComponent.ngAfterViewInit (index.js:7730)
at callProviderLifecycles (core.js:12689)
at callElementProvidersLifecycles (core.js:12656)
at callLifecycleHooksChildrenFirst (core.js:12639)
at checkAndUpdateView (core.js:13794)
at callViewAction (core.js:14136)
at execComponentViewsAction (core.js:14068)
at checkAndUpdateView (core.js:13791)
at callViewAction (core.js:14136)
My Html Template File:
<div>
lalalal <br/>
ante pali... <br/>
kala ti na pw... <br/>
Gamiete pali... <br/>
<ngx-charts-bar-vertical
[view]="view"
[scheme]="colorScheme"
[results]="data"
[gradient]="gradient"
[xAxis]="showXAxis"
[yAxis]="showYAxis"
[legend]="showLegend"
[showXAxisLabel]="showXAxisLabel"
[showYAxisLabel]="showYAxisLabel"
[xAxisLabel]="xAxisLabel"
[yAxisLabel]="yAxisLabel"
(select)="onSelect($event)">
</ngx-charts-bar-vertical>
</div>
While the service for retreiving the values is:
import {Injectable} from '#angular/core';
import {HttpClient} from '#angular/common/http';
import {catchError} from 'rxjs/operators';
import {ErrorHandler} from '../shared/lib/error-handler';
import {Observable} from 'rxjs/Observable';
#Injectable()
export class StatisticsService {
constructor(private http: HttpClient) {
}
public getIncidentsByDay(): Observable<any> {
console.log("FEtching Incidents All By Day");
const url = 'statistics/incidents/day';
return this.http.get(url)
.pipe(catchError(ErrorHandler.handleError));
}
}
What am I doing wrong?

Answer 1

I am using Angular version 5.3 and ngx-charts 8.0 which is compatible with Angular 6 and not Angular 5. I installed ngx-charts version 7.4 and everything works fine.

Answer 2

I fixed the problem for me by downgrading to version 7.3.0
yarn add #swimlane/ngx-charts#7.3.0

Answer 3

I think I see the same with ngx-charts-bar-horizontal, whereas before this was not the case. The documentation page seems to be broken at the moment as well, so I assume the software has recently been updated in a broken way.

Answer 4

If you really need to use the 8.0 version, you can upgrade to angular 6 to solve the problem. Here is how you can do the upgrade from v5 to v6 https://stackoverflow.com/a/49474334
You can also think that the documention page is broken by now but ou can find it here https://swimlane.gitbook.io/ngx-charts/v/docs-test/installing