I have been thinking about extending John's debug plugin to do something similar to lint to catch things like these:

- Use of deprecated methods - Clearing all event handlers rather than just your own - Using DOM methods/properties on jQuery objects - Strict argument checking - Inefficient selectors like $(":input") or $("div#id") - Selectors that don't return any elements - Selectors with bad syntax or obsolete functions

Not all of them are outright errors but the goal is to point out potential problems or cleaner/safer/faster ways to do things, especially for novices. Like John's original plugin, it would wrap around the existing api and not require any code to be inserted into the jQuery source.

Any ideas for a plugin like this?