Sensible usage of ARIA roles and attributes

There are some ARIA roles and attributes that we use and recommend in our daily business, especially regarding JavaScript widgets. If you know their peculiarities, they sometimes can be pretty helpful (with predictable risk). But often we also offer alternative techniques: if feasible, we use (and recommend) them instead of ARIA.

Before you proceed, please thoroughly read ARIA - when HTML simply is not enough and Introduction to screen reader usage, especially Screen readers' browse and focus modes!