JSFiddle - React, Tailwind, and code Playground

HTML

<input class="etape btn-info others">
<input class="etape btn-inverse others">
<input class="etape btn-danger others">
    
<input class="no">
<input class="no">
<input class="no">

JavaScript

$("input[class^='btn'], input[class*=' btn']").each(function(){
    alert($(this).attr('class'));
})