New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  actions: {
    log(msg) {
      alert(msg);
    }
  }
});

templates.application.hbs

<h2>Svg & onMouseEnter with Ember handler</h2>
<svg
  style="pointer-events: all;"
  viewBox="0 0 10 10"
  width="10%"
>
  <rect
    style="pointer-events: all;"
    width="100"
    height="100"
    fill="red"
    {{action "log" "ember works" on="mouseEnter"}}
  ></rect>
</svg>

<h2>Svg & onMouseEnter with native handler</h2>
<svg 
  style="pointer-events: all;"
  viewBox="0 0 10 10"
  width="10%"
>
  <rect
    style="pointer-events: all;"
    width="100"
    height="100"
    fill="green"
    onmouseenter="javascript:alert('native works')"
  ></rect>
</svg>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}