有没有办法从以前的链访问jQuery对象？

Question

Not sure how I could search for these type of question/answer...

This is what I am trying to do...

(function($){
    $.fn.helloworld = {
        want: function () {
            alert("I want" + this + "!");
        }
    };
})(jQuery);

Now when I call the function this way, and try to retrieve this , it will only give me the helloworld "object".

$("#test").helloworld.want();

Is there a way to access the caller element, #test , from within?

Answer 1

There's no "nice" way. You could do this:

var $test = $('#test');
$test.helloworld.want.call($test);

The problem is that by setting up the structure you've got you're essentially forcing the behavior you say you don't want.

What you could do instead is this:

$.fn.helloworld = function( action ) {
  var actions = {
    test: function() {
      alert("Hi!");
    },
    // ...
  };

  if (actions[action])
    return actions[action].apply(this, [].slice.call(arguments, 1));
  return this;
};

Now you can call it:

$('#this').helloworld("test");