Currently, $(<selector>).ready() ignores the selector and acts as though document was passed. I suggest that it instead act like other event binding functions, and call the callback with this bound to each matching element, or not at all if no elements match.

In particular, this would be convenient for including page-specific actions in a site's bundled assets. Assuming that a page was uniquely identified, for example with an id at the body element, page specific code could be isolated:

// index.js
$("#index").ready(function () {
  // page specific code for index page
});

// post.js
$("#post").ready(function () {
  // page specific code for post page
});

Now index.js and post.js can be concatenated and minified, and the resulting bundle downloaded only once, and still each page will run only the correct initialization code.