Dynamically Add Form Fields and Update Field Value

Question

I have a form that you can add fields: http://jsfiddle.net/ytrkqr6a/2/

 $(document).ready(function() {
 var max_fields = 32; //maximum input boxes allowed
 var wrapper = $(".cameras"); //Fields wrapper
 var add_button = $(".add-camera"); //Add button ID
 var x = 1; //initlal text box count
 $(add_button).click(function(e){ //on add input button click
 e.preventDefault();
 if(x < max_fields){ //max input box allowed
 x++; //text box increment
 $(wrapper).append('<div class="form-group"><input type="text" name="camera '+ x +'" value="Camera '+ x +'" placeholder="Camera '+ x +'" class="form-control cameras" readonly /> <a href="#" class="remove-camera">Remove</a></div>'); //add input box
 }
 });
 $(wrapper).on("click",".remove-camera", function(e){ //user click on remove text
 e.preventDefault(); $(this).parent('div').remove(); x--;
 })
});
<div class="cameras">
 <div class="camera-field"><button class="add-camera btn btn-primary">+ Add Camera</button></div>
 <div style="clear:both;"></div>
 <div class="form-group"><input type="text" name="camera" value="" placeholder="Camera 1" class="form-control cameras" readonly /></div>
 </div>

Everything works fine adding fields, but where I'm hung up is when you remove one of the fields then numerical order gets off.. how do I make it update the remaining fields to stay in proper numerical order each time you add or remove a field:

Camera 1
Camera 2
Camera 3
etc...

Thanks ahead of time!

Answer 1

I just added a jQuery "each" loop to re placerholder, name, and value each input field every time a remove link is clicked. When using each the value passed to the function is the index of item in the loop's current iteration, I used the variable elm. Since each input field is classed with camerasCounter, you can use $(this) to easily call the input element in the loop. Each is a very useful part of jQuery, if you ask me.

http://jsfiddle.net/v76zn30o/2/

The HTML

<div class="cameras">
 <div class="camera-field"><button class="add-camera btn btn-primary">+ Add Camera</button></div>
 <div style="clear:both;"></div>
 <div class="form-group"><input type="text" name="camera" value="" placeholder="Camera 1" class="form-control camerasCounter" readonly /></div>
 </div>

and The jQuery

$(document).ready(function() {
var max_fields = 32; //maximum input boxes allowed
var wrapper = $(".cameras"); //Fields wrapper
var add_button = $(".add-camera"); //Add button ID
var x = 1; //initlal text box count
 $(add_button).click(function(e){ //on add input button click
 e.preventDefault();
 if(x < max_fields){ //max input box allowed
 x++; //text box increment
 $(wrapper).append('<div class="form-group"><input type="text" name="camera '+ x +'" value="Camera '+ x +'" placeholder="Camera '+ x +'" class="form-control camerasCounter" readonly /> <a href="#" class="remove-camera">Remove</a></div>'); //add input box
 }
 });
 $(wrapper).on("click",".remove-camera", function(e){ //user click on remove text
 e.preventDefault(); $(this).parent('div').remove();
 $(".camerasCounter").each(function(elm){
 x = elm + 1
 $(this).attr({
 "placeholder": "Camera " + x,
 "name": "Camera " + x, 
 "value": "Camera " + x
 }); 
 });
 });
});

• AJK: If I wanted to add "options" to each camera, how would I make it so that each Name value = the name value of the camera? So that when I go to process the form, I can pull checkmarked options for each camera that is added: jsfiddle.net/Lxqvmg4w
• quid: I updated your jsfiddle: jsfiddle.net/Lxqvmg4w/2 You add the counter to each input item in your form-group class. You loop through the form-group class, then add the counter to each input element in the form-group.