JSFiddle - React, Tailwind, and code Playground

by Trisox

HTML

<input type="text" name="start_date" data-startdate="1" class="date-pick" />
<input type="text" name="start_date" data-startdate="2" class="date-pick" />
<input type="text" name="start_date" data-startdate="3" class="date-pick" />
<input type="text" name="start_date" data-startdate="4" class="date-pick" />

JavaScript

$(".date-pick").each(function(){
            var $this = $(this);
            $(this,'.date-pick').val ($this.data ('startdate'));
        });