D3 OMG Particles II

Mike Bostock’s Block 9539958

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>

<form action="/action_page.php">
<select name="cars" id ="foo" multiple>
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="opel">Opel</option>
  <option value="audi">Audi</option>
</select>
<input type="submit">
</form>

<button onclick="foo()" >foo</button>

JavaScript

foo = () => {
	$('#foo').children().each(c => $(c).hide())
}