JSFiddle - React, Tailwind, and code Playground

by chridam

HTML

<div id="searchFields" class="control-group inlineForm">
<form id="myForm">
    <div id="input1" style="margin-bottom:4px;" class="clonedInput">
        Regnr: <input type="text" name="regNr" placeholder="Regnr." id="name1" />
        PO.nr: <input type="text" id="poNr" placeholder="PO.nr." size="12" maxlength="12">
    </div>
 
    <div>
        <input type="button" id="btnAdd" value="add another Reg field" />
        <input type="button" id="btnDel" value="remove fields" />
    </div>
    <input type="button" value="GET INFO" class="last" id="getBaseInf">
</form>
</div>

JavaScript

$('#btnAdd').click(function() {
    var num     = $('.clonedInput').length; // how many "duplicatable" input fields we currently have
    var newNum  = new Number(num + 1); // the numeric ID of the new input field being added
 
    // create the new element via clone(), and manipulate it's ID using newNum value  
    var newElem = $('#input' + num).clone().attr('id', 'input' + newNum);
 
    // manipulate the name/id values of the input inside the new element
    newElem.children(':first').attr('id', 'regNr' + newNum).attr('regNr', 'regNr' + newNum);
    
    // insert the new element after the last "duplicatable" input field
    $('#input' + num).after(newElem);
    
    // enable the "remove" button
    $('#btnDel').removeAttr('disabled');
 
    // business rule: you can only add 5 names
    if (newNum == 5)
        $('#btnAdd').attr('disabled','disabled');
});
 

$('#btnDel').click(function() {
     var num = $('.clonedInput').length;
 
    $('#input' + num).remove();     // remove the last element
     
    $('#btnAdd').attr('disabled',''); // enable the "add" button
 
    // if only one element remains, disable the "remove" button
    if (num-1 == 1)
          $('#btnDel').attr('disabled','disabled');
});
 
$('#btnDel').attr('disabled','disabled');