import { animate, utils } from 'animejs';

const [ $log ] = utils.$('.demo code');

const vector2D = { x: 0, y: 0 };

animate([vector2D, '.square'], {
  x: '17rem',
  modifier: utils.roundPad(2).padStart(5, '0'),
  onRender: () => $log.textContent = JSON.stringify(vector2D),
});

<pre class="row large centered">
  <code>{"x":"0"}</code>
</pre>
<div class="row medium">
  <div class="square"></div>
</div>