javascript - jQuery.extend 默认操作只有一个输入

Question

给定:

jQuery.extend({
  fooBar: function(){ return 'baz'; }
});

它会修改基础 jQuery 对象吗？所以之后你可以调用 jQuery.fooBar();//'巴兹'

文档中没有任何内容，但据我所知，这就是源所做的。

Answer 1

此行为记录在此处:http://api.jquery.com/jQuery.extend/

If only one argument is supplied to $.extend(), this means the target argument was omitted. In this case, the jQuery object itself is assumed to be the target. By doing this, we can add new functions to the jQuery namespace. This can be useful for plugin authors wishing to add new methods to JQuery.