Consistency in navigation

Question

Is it going against best practice to have some items in the main navigation clickable and other items not clickable they just reveal a drop down? Should the pages that reveal a drop down have a landing page?

Answer 1

Yes it does. You need to make the drop-down navigation item clickable to make the link accessible to touch interface users.

You don't need not to have a landing page for the drop down-click, just make the drop down-item stay open when the top navigation have been clicked or hovered.

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^{Off Topic: Here are some useful scripts for implementation: Drop-Down Menu: 30+ Useful Scripts To Enhance Header Navigation}