JS Error from Version 3.10.x and forward

[designerbrent]

I recently noticed that we have an JS error in the console on every site running ALPS 3.10.0 and newer. That is the version that came with the new search patterns in #519.

The error that shows is the following:

Uncaught TypeError: Cannot read property 'length' of undefined
    at 3.11.0-script.min.js:4
    at 3.11.0-script.min.js:4
(anonymous) @ 3.11.0-script.min.js:4
(anonymous) @ 3.11.0-script.min.js:4

That points to this line:

alps/source/js/script.js

Line 501 in 79f69f0

if (searchInput.blur && searchInput.val().length == 0) {

Please take a look at what we can do to resolve this bug.