JSFiddle - React, Tailwind, and code Playground
HTML
<input class="etape others" data-btntype="info">
<input class="etape others" data-btntype="inverse">
<input class="etape others" data-btntype="danger">
JavaScript
$(".etape").click(function(){
var myBtnType = $(this).data('btntype');
alert(myBtnType);
});