title: Flutter multiple email TextField
body: <p>For learning purpose i'm trying to do a gmail clone, i'm struggling with the multi email input you have when you are editing a new mail. I need to be abble to listen either for &quot;ENTER&quot; or &quot;SPACE&quot; so that i can modify the input (after validation) with a email &quot;block&quot; like this :</p>
  <p><a href="https://i.stack.imgur.com/xn49V.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xn49V.png" alt="enter image description here" /></a></p>
  <p>I think i can work with the onFieldSubmitted tag for the &quot;ENTER&quot; key but how can i change the input text ? I tried :</p>
  <p><code>controller.text = Container();</code></p>
  <p>but the &quot;text&quot; only accepts String (which seems logic).</p>
  <p>The goal is to do the exact same kind of inputField where you put the &quot;Tags&quot; on StackOverflow.</p>
  <p>I also found the EmailInputElement but i can't figure out how to use it properly, it seems like it's not a widget.</p>
  <p>If someone have any idea it would be much appreciated, thanks.</p>