JSFiddle - React, Tailwind, and code Playground

HTML

<input id="text_tag_input" type="text" name="tags" />

<div class="tags_select">
    <a href="#">text1</a>
    <a href="#">text2</a>
    <a href="#">text3</a>
</div>

JavaScript

$('.tags_select a').click(function() {
    var value = $(this).text();
    var input = $('#text_tag_input');
    input.val(input.val() + value + ', ');
    return false;
});