How to access SVG animateMotion events in Angular?

Question

TheanimateMotion element fires three events: onbegin,onrepeat and onend. In pure Javascript I can bind an eventlistener like this:

<circle r="15" fill="red">
    <animateMotion
        dur="10s" 
        begin="indefinite" 
        repeatCount="indefinite" 
        calcMode="linear"
        repeatCount="indefinite" 
        path="...."
    />
</circle>


var anim = document.getElementsByTagName("animateMotion");

anim.onrepeat = function() {
    alert("repeat")
}
anim.onbegin = function() {
    alert("start")
}
anim.onend = function() {
    alert("end")
}

But how can I get access to these event in Angular 9? Is there any way to get access to the events?

Thx in advance, Lars

Answer 1

Try the updated approach below as my initial assumption was indeed inaccurate, since I was not too familiar with those specific events.

Update: my initial assumption was that the below would work - was proved wrong:

<svg:circle r="15" fill="red">
    <svg:animateMotion (repeat)="repeatMethodInsideTs()"
        dur="10s" 
        begin="indefinite" 
        repeatCount="indefinite" 
        calcMode="linear"
        repeatCount="indefinite" 
        path="...."
    />
</svg:circle>

Note in your template the XML of svg should have "svg" for each tag.

Then I decided to still see if there are equivalent events we can just bind to in angular in a clean fashion and viola:

<svg viewBox="0 0 200 100" xmlns="http://www.w3.org/2000/svg">
  <svg:path fill="none" stroke="lightgrey"
    d="M20,50 C20,-50 180,150 180,50 C180-50 20,150 20,50 z" />

  <svg:circle r="5" fill="red">
    <svg:animateMotion (beginEvent)="begin($event)" (repeatEvent)="repeat($event)" dur="3s" repeatCount="indefinite"
      path="M20,50 C20,-50 180,150 180,50 C180-50 20,150 20,50 z" />
  </svg:circle>
</svg>

Now in ts:

import { Component } from '@angular/core';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent  {
  name = 'Angular';

  repeat(event) {
    console.log("repeat event called", event)
  }

  begin(event) {
    console.log("repeat event called", event)
  }
}

Here is stackblitz: https://stackblitz.com/edit/angular-px8uf3