2. Operable User interface components and navigation must be operable. Guideline 2.1 Keyboard Accessible Understanding Keyboard Accessible | How to Meet Keyboard Accessible Make all functionality available from a keyboard. Success Criterion 2.1.1 Keyboard Understanding Keyboard | How to Meet Keyboard (Level A) All functionality of the content is operable through a keyboard interface without requiring specific timings for individual keystrokes, except where the underlying
      function requires input that depends on the path of the user's movement and not just
      the endpoints. Note 1 This exception relates to the underlying function, not the input technique.