[gizmo]

The if condition is wrong. This is why functions like indexOf should return a tuple of a boolean and an offset instead of encoding "not found" by returning -1.

[ChristianBundy]

The if condition should use >= rather than >, but it otherwise makes sense.

[dahart]

I'm not arguing in favor of writing it that way, but I might argue it's not incorrect as written. location.href can never start with an underscore.

A regex on location.pathname would sure be a lot clearer to read, though.