I am building a view that requires users to select from a drop down menu containing a list of taxonomy terms, which will then filter the view results based on those terms. So far, so good.
I want to make the dropdown menu with only all of parent taxonomy terms of a specific vocabulary so that when one of the parent terms is selected, a second drop down menu shows all of the children of the selected term.
How can I accomplish this, preferably without an extra module? I will consider any means to accomplish this goal.
More specifically, I am building a view based on states and counties, and want users to first select a state and then select from the list of counties for that state.