New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

button {
  background-color: red;
  position: absolute;
  top: 200px;
  left: 200px;
  z-index: 1;
}

button.noclick {
  background-color: red;
  position: absolute;
  top: 240px;
  left: 80px;
  z-index: 1;
}


.mask {
  position: absolute;
  pointer-events: none;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  width: 100%;    
  height: 100%;
  z-index: 2;
}

.mask path {
  pointer-events: initial;
  width: 100%;
  height: 100%;
}

templates.application.hbs

<p>You can click the buttons that show through the mask. But you can't click the part of the button under the mask</p>

<button>Click</button>
<button class='noclick'>NO NO NO Click (under mask)</button>

<svg class='mask' xmlns="http://www.w3.org/2000/svg">
  <path id="svg_1" d="m60,97c0,2 -6,244 -6,244c0,0 251,-5 251,-5c0,0 148,0 148,0c0,0 2,-143 2,-143c0,0 5,-112 5,-112c0,0 -188,1 -188,1c0,0 -1,93 -1,93c0,0 102,-1 102,-1c0,0 -2,94 -2,94c0,0 -253,1 -253,1c0,0 3,-91 3,-91c0,0 142,-3 142,-3c0,0 36,-7 36,-7c0,0 -4,-86 -4,-86c0,0 -235,13 -235,15z" stroke-width="1.5" stroke="#191919" fill="#000"/>
</svg>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}