在jQuery选择器中使用hash

Question

I am using jQuery 1.8.0 as part of a WordPress plugin and storing mouse click x/y coordinates and keeping the node information including the parent path information (similar to Getting a jQuery selector for an element ).

After some experimentation I noticed that jQuery could not read some of the selectors I had stored. Some examples:

html#:eq(0) -> the '#' is not necessary but jQuery evaluates it with or without the '#'!
body#:eq(0) -> jQuery cannot evaluate this, it aborts/stops at this line (different behavior to html tag)

div#:eq(1) -> jQuery evaluates this (should abort?)
div:eq(1) -> jQuery aborts/stops at this line (should work?)

Is this a bug (if it is I will report it to jQuery)? My understanding from comments made to this question is that the '#' should be present if and only if there is an id for the element but this does not seem to be how jQuery is behaving.

Answer 1

The hash is part of an id CSS selector , so it has to be included when you are targeting elements based on some id and it must not be included in all other situations.

All of your examples fall into the latter category.