Start a svg animation onclick event

Question

This following code works fine when an initial begin time is provided for the animation of the SVG polygon. But I can't figure out how to trigger it via javascript/jquery without providing a begin time to "vbanim" animation.

$('button').click(function() {
  $('#v-b').beginElement();
})

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button>Click to draw</button>
<svg width="100px" height="100px" preserveAspectRatio="false" viewBox="0 0 500 800">
  <polygon points="20,20 490,20 490,780 20,780" stroke="black" fill="transparent" stroke-width="2" id="v-b" stroke-dasharray="3000"/>
  <animate xlink:href="#v-b" attributeName="stroke-dashoffset" from="3000" to="0" dur="2s" begin="indefinite" fill="freeze" id="vbanim"/>
  <animate xlink:href="#v-b" attributeName="fill" from="transparent" to="rgba(130,130,130,0.6)" dur="1s" begin="vbanim.end" fill="freeze"/>
</svg>

I need the stroke-dashoffset and the fill animation to occur only after the button has been clicked and prior that, the SVG shouldn't be visible at all. Thanks for the help.

Answer 1

The preferred working solution using beginElement() to indefinitely start the animation when an event is generated.

Note- beginElement() function works only with native javascript/ not Jquery.

$('button').click(function() {
  document.getElementById('vbanim').beginElement();
})

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button>Click to draw</button>
<svg width="100px" height="100px" preserveAspectRatio="false" viewBox="0 0 500 800">
  <polygon points="20,20 490,20 490,780 20,780" stroke="black" fill="transparent" stroke-width="0" id="v-b" stroke-dasharray="3000" />
  <animate class="anim1" xlink:href="#v-b" attributeName="stroke-dashoffset" from="3000" to="0" dur="2s" begin="indefinite" fill="freeze" id="vbanim"/>
  <animate class="anim2" xlink:href="#v-b" attributeName="fill" begin="vbanim.end" from="transparent" to="rgba(130,130,130,0.6)" dur="1s"  fill="freeze"/>
  <animate class="anim3" xlink:href="#v-b" attributeName="stroke-width" from="0" to="10" dur="0.2s" begin="vbanim.begin" fill="freeze" id=""/>
</svg>