尝试一下:

( function($) {
  window.myFunction = function(obj) {
    console.log($(obj));
  }
})(jQuery);

单独的文件:

myFunction({X:1});

区别在于您的代码不会在dom准备就绪后立即执行，而是将函数放置在全局上下文(窗口)中，因此它将随处可见.

The difference is that your code is executed immediately not after the dom is ready and you are placing the function in the global context (window.) so it will be available everywhere.

我不知道您在做什么，但是在这种情况下，您可能会发现一个更适合您的JQuery插件:

I don't know what it is your doing, but in this case you may find a JQuery plugin suits you better:

( function($) {
  $.fn.myFunction = function(obj) {
    console.log(this);
  }
})(jQuery);

单独的文件:

jQuery({X:1}).myFunction();

当然，$({X:1})可能会对JQuery做一些奇怪的事情-我以前从未尝试过！

Of course, $( {X:1} ) might do strange things with JQuery - I've never tried it before!