JSFiddle - React, Tailwind, and code Playground

HTML

<form id="addTagName">
    <input onblur="GetFieldValue(this);" name="tagName"/>
</form>

JavaScript

function GetFieldValue(FieldID)
    {
        var elementType = $("#"+FieldID).prev().prop('tagName');
        alert(elementType);
        var elementValue = "";
        switch (elementType) {
            case "input":
                elementValue = $("#"+FieldID).val()
                break;
        }
        return elementValue;
    }