jQuery 动态添加表单域，删除表单域

Question

Hello I am trying to add new form field and delete form field after getting inspired from this tutorial - http://bootsnipp.com/snipps/dynamic-form-fields

My Current Problem is to delete and reset the value of all in chronological order.

<input type="hidden" name="count" value="1" />
<div class="control-group" id="fields">
           <label class="control-label" for="field1">Nice Multiple Form Fields</label>
           <div class="controls" id="profs"> 
             <div class="input-append">
               <input autocomplete="off" class="span3" id="field1" name="prof1" type="text" placeholder="Type something (it has typeahead too)" data-provide="typeahead" data-items="8" 
data-source='["Aardvark","Beatlejuice","Capricorn","Deathmaul","Epic"]'/><button id="b1" onClick="addFormField()" class="btn btn-info" type="button">+</button>
             </div>
             <br /><small>Press + to add another form field :)</small>
           </div>
         </div>

Javascript:-

var next = 1;

function addFormField(){
    var addto = "#field" + next;
    next = next + 1;
    var newIn = '<br /><br /><input autocomplete="off" class="span3" id="field' + next + '" name="field' + next + '" type="text" data-provide="typeahead" data-items="8"><button id="b1" onClick="$(this).parent().remove();" class="btn btn-info" type="button">+</button>';
    var newInput = $(newIn);
    $(addto).after(newInput);
    $("#field" + next).attr('data-source',$(addto).attr('data-source'));
    $("#count").val(next);  
}

Parent Element is getting removed, but next counter is not reset properly. in hidden and all new created form:-

Only Add Demo:- http://bootsnipp.com/snipps/dynamic-form-fields

Add an Delete Demo with Bug:- http://jsfiddle.net/6dCrT/2/

Can someone help me please.

Thanks

Answer 1

Try:

function addFormField(){
    var addto = "#field" + next;
    next = next + 1;
    var newIn = '<br /><br /><input autocomplete="off" class="span3" id="field' + next + '" name="field' + next + '" type="text" data-provide="typeahead" data-items="8"><button id="b'+next+'" onClick="$(this).prev().remove();$(this).remove();" class="btn btn-info" type="button">-</button>';
    var newInput = $(newIn);
    console.log(addto);
    $(addto).after(newInput);
    if(next>1)
        $("button#b"+next).after(newInput);
    $("#field" + next).attr('data-source',$(addto).attr('data-source'));
    $("#count").val(next);  
}

DEMO FIDDLE

Answer 2

In my example, I was building a form that would allow users to add multiple input names if they had more than one dog.

    var counter = 0
    jQuery(function () {
      $(".newDog").click(function(){
        counter ++;
        if (counter < 4) {
          var elem = $("<input/>",{
            type: "text",
            name: `dogname${counter}`
        });
        } else {
          alert("You can only add 4 Dog Names")
        }
        
        var removeLink = $("<span/>").html("X").click(function(){
            $(elem).remove();
            $(this).remove();
            counter --;
        });
        
        $(".dogname-inputs").append(elem).append(removeLink);
    });
    })

Full credit as mentioned to https://stackoverflow.com/users/714969/kevin-bowersox