JSFiddle - React, Tailwind, and code Playground

HTML

<fieldset id="buildyourform">
        <legend>Build your own form!</legend>
        <div class="fieldwrapper" name="field1" id="field1" />
           <input type="text" name="name" class="fieldname" id="tb1_1" />
           <input type="text" name="email" class="lastname" id="tb1_2" />
           <input type="button" value="+" class="add" id="add" />
        </div>
    </fieldset> <input type="submit" value="send" id="asdasd" name="submit" />

CSS

body
{
    font-family:Gill Sans MT;
    padding:10px;
}
fieldset
{
    border: solid 1px #000;
    padding:10px;
    display:block;
    clear:both;
    margin:5px 0px;
}
legend
{
    padding:0px 10px;
    background:black;
    color:#FFF;
}
input.add
{
       float:left;
    display:block;
    margin:5px;
}
input.fieldname
{
    float:left;
    clear:left;
    display:block;
    margin:5px;
}
input.lastname
{
    float:left;
    display:block;
    margin:5px;
}
input.remove
{
    float:left;
    display:block;
    margin:5px;
}
#yourform label
{
    float:left;
    clear:left;
    display:block;
    margin:5px;
}
#yourform input, #yourform textarea
{
    float:left;
    display:block;
    margin:5px;
}

JavaScript

$(document).ready(function() {
        $("#add").click(function() {
            var intId = $("#buildyourform div").length +1;
            var fieldWrapper = $("<div class=\"fieldwrapper\" name=\"field" + intId + "\" id=\"field" + intId + "\"/>");
            var fName = $("<input type=\"text\" name=\"name\" class=\"fieldname\" id=\"tb"+ intId +"_1\"/>");
            var lname = $("<input type=\"text\" name=\"email\" class=\"lastname\" id=\"tb"+ intId +"_2\"/>");
            var removeButton = $("<input type=\"button\" class=\"remove\" value=\"-\" />");
            
            var addButton = $("<input type=\"button\" class=\"add\" id=\"add\" value=\"+\" />")
            removeButton.click(function() {
                $(this).parent().remove();
            });
            fieldWrapper.append(fName);
            fieldWrapper.append(lname);
            fieldWrapper.append(removeButton);
            fieldWrapper.append(addButton);
            $(this).remove();
            $("#buildyourform").append(fieldWrapper);

        });

    });