Tabindex based on enter key by getting form elemen

问题:

I have a form, and I am able to get all form elements through serializeArray(). I want to focus() on form elements based on their tabindex value using enter key. Only if it has value in it or else focus on itself.

Little new to jQuery so if any mistakes...

$.fn.entertab = function()
  {

 var key = e.charCode ? e.charCode : e.keyCode ? e.keyCode : 0;
  var maxTabIndex = 20;
        var elements = this.serializeArray();
     $.each(elements, function(i, element)
        {

 this.keypress(function(e){ 
    var nTabIndex=this.tabIndex;
       var myNode=this.nodeName.toLowerCase();
            if(nTabIndex > 0 && key == 13 && nTabIndex <= maxTabIndex && ((!myNode.attr("disabled")) || (myNode.val == "")))
      {
   myNode.focus(); 
   }
   else
   {
   nTabIndex=this.tabIndex+1;
      myNode.focus();
   }
   });

     });
        }
  $("theform").entertab();

回答1:

You can also try this HTML

<input id="122" class='TabOnEnter' tabindex="1" /><br>
<input id="123" class='TabOnEnter' tabindex="2" /><br>
<input id="124" class='TabOnEnter' tabindex="4" />This input is hidden<br>
<input id="124" class='TabOnEnter' tabindex="5" /><br>
<input id="125" class='TabOnEnter' tabindex="3" /><br>
<textarea class='TabOnEnter' tabindex="6">Hi, I am a test area</textarea>

SCRIPT ///////////

$(document).on("keypress", ".TabOnEnter" , function(e)
  {
    //Only do something when the user presses enter
    if( e.keyCode ==  13 )
    {
       var nextElement = $('[tabindex="' + (this.tabIndex+1)  + '"]');
       console.log( this , nextElement ); 
       if(nextElement.length )
         nextElement.focus()
       else
         $('[tabindex="1"]').focus();  
    }   
  });

//Hidden inputs should get their tabindex fixed, not in scope ;)
//$(function(){ $('input[tabindex="4"]').fadeOut();  })

////////////// Worked Fine in EI,Chrome, Mozilla . not tested in safari and other browser

回答2:

I think I understand what you want to do. I rewrote your code and ended up with this:

(function($){

    $.fn.entertab = function(options) {

        var defaults = {
            maxTabIndex: 20
        };

        options = $.extend({}, defaults, options);

        return this.filter('form').each(function(){

            var $this = $(this),
                $elms = $this.find("[tabindex]");

            $elms.each(function(){
                var $elm = $(this),
                    idx = parseInt($elm.attr("tabindex"));
                if (idx > options.maxTabIndex) {
                    return;
                }
                $elm.keydown(function(e){
                    if (e.which == 13 && ($elm.val() != '')) {
                        $elms.filter("[tabindex="+(idx+1)+"]").focus();
                        e.preventDefault();
                    }
                });
            });
        });
    };

})(jQuery);

There's a working example on jsFiddle.