JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" name="foo" value="un" class="preview" />
<input type="button" name="foo" value="deux" />
<input type="button" name="foo" value="trois" class="preview"  />
<input id="bar" type="button" value="go" />

CSS

.preview {display:none;}

JavaScript

$('#bar').click( function(){
    $('[name="foo"].preview').fadeIn(4000, function(){alert('finished') })
})