title: Create a custom unsupported emoji
body: <p>how can I create a custom emoji using javascript?</p>
  <p>I have been asked to remove all the emoji which aren't supported by users device (I think emoji's are dependent on the device even though you are using on a web browser) so I have no way to test it even if I am able to implement it.</p>
  <p>I came across this answer which might be helpful: <a href="https://stackoverflow.com/questions/45576748/how-can-i-detect-rendering-support-for-emoji-in-javascript">How can I detect rendering support for emoji in JavaScript?</a> but unfortunately my device supports all the emoji.</p>
  <p>So I was thinking about other way round? Creating an unsupported emoji but I am not sure how to create an unsupported emoji and how to use it with javscript</p>
  <p>I can't remove the emoji file from my device because I have also been asked to write test cases.</p>