JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="theinput"/>
<br/>
<input type="button" class="button" value="button01"/>
<br/>
<input type="button" class="button" value="button02"/>
<br/>
<input type="button" class="button" value="button03"/>
<br/>
<input type="button" class="button" value="button04"/>
<br/>
<input type="button" class="button" value="button05"/>

JavaScript

var theButtons = $(".button");

theButtons.click(function(index) {
    var currentButton = $(this);
    var buttonValue = currentButton.val();

  $("#theinput").val(buttonValue);

});