"Dynamic form fields - Add new field on focus or change"
Bootstrap 3.1.0 Snippet by linderjoy

<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <h3>Fields</h3> <div class="row"> <div class="form-group form-group-options col-xs-11 col-sm-8 col-md-4"> <div class="input-group input-group-option col-xs-12"> <input type="text" name="option[]" class="form-control" placeholder="Focus me"> <span class="input-group-addon input-group-addon-remove"> <span class="glyphicon glyphicon-remove"></span> </span> </div> </div> </div> <div class="row"> <div class="form-group form-group-options col-xs-11 col-sm-8 col-md-4"> <div class="input-group input-group-option col-xs-12"> <input type="text" name="option[]" class="form-control" placeholder="Focus me"> <span class="input-group-addon input-group-addon-remove"> <span class="glyphicon glyphicon-remove"></span> </span> </div> </div> </div> </div> <div class="container"> <h3>Inline</h3> <form class="form-inline"> <div class="form-group"> <input type="text" class="form-control" placeholder="SPN"> </div> <div class="form-group"> <input type="text" class="form-control" placeholder="FMI"> </div> <button class="btn"><span class="glyphicon glyphicon-remove"></span></button> </form> </div>
/* Text fields */ div.input-group-option:last-child span.input-group-addon-remove{ display: none; } div.input-group-option:last-child input.form-control{ border-bottom-right-radius: 3px; border-top-right-radius: 3px; } div.input-group-option span.input-group-addon-remove{ cursor: pointer; } div.input-group-option{ margin-bottom: 3px; } /* Selects */ div.input-group-multiple-select:last-child span.input-group-addon-remove{ display: none; } div.input-group-multiple-select:last-child input.form-control{ border-bottom-right-radius: 3px; border-top-right-radius: 3px; } div.input-group-multiple-select span.input-group-addon-remove{ cursor: pointer; background: none; border: none; } div.input-group-multiple-select{ margin-bottom: 5px; }
/* Text fields */ $(function(){ $(document).on('focus', 'div.form-group-options div.input-group-option:last-child input', function(){ var sInputGroupHtml = $(this).parent().html(); var sInputGroupClasses = $(this).parent().attr('class'); $(this).parent().parent().append('<div class="'+sInputGroupClasses+'">'+sInputGroupHtml+'</div>'); }); $(document).on('click', 'div.form-group-options .input-group-addon-remove', function(){ $(this).parent().remove(); }); });

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