in

production

Filters for an element inside another element.

Examples:

--------------------
|     outerEl      |
|  --------------  |
|  |  innerEl   |  |
|  --------------  |
|                  |
--------------------

// Returns innerEl because innerEl is inside outerEl
...innerEl().in().outerEl()
// Returns nothing because innerEl is not inside outerEl
...outerEl().in().innerEl()