JSFiddle - React, Tailwind, and code Playground
HTML
<script>
function myFunction(e){
alert(e.id);
}
</script>
<input type="button" id="1" class="buttonID" value="answer" onClick=myFunction(this) />
<input type="button" id="2" class="buttonID" value="answer" onClick=myFunction(this) />
<input type="button" id="3" class="buttonID" value="answer" onClick=myFunction(this) />