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");
var $theinput = $("#theinput");
$theButtons.click(function() {
    $theinput.val(this.value);
});