ng2-charts update labels and data

Question

I\'m trying to create dynamically a chart using ng2-chart, I get information from an angular 2 service, when I change only labels of chart it works and when I change data on

Answer 1

Apparently, if you do not modify the original reference to the labels array, it seems to work, at least for me. I mean, if you want a completely different set of labels, you should do something like this:

In the template:

In the ts component:

this.lineChartLabels.length = 0;
for (let i = tempLabels.length - 1; i >= 0; i--) {
  this.lineChartLabels.push(tempLabels[i]);
}

Or, using new ECMAScript syntax:

this.lineChartLabels.length = 0;
this.lineChartLabels.push(...tempLabels);

The key is maybe the this.lineChartLabels.length = 0; statement, which practically 'empties' your array by setting its length to 0, without modifying the reference. Hope this helps!