JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" placeholder="asdfasdf" value="asdfasdf"/>

JavaScript

$.fn.pVal = function(){
        var $this = $(this),
            val = $this.eq(0).val();
        if(val == $this.attr('placeholder'))
            return '';
        else
            return val;
    }
    $(function(){
        alert($('input').val())
        alert($('input').pVal())
    });