Generated by XState Viz: https://xstate.js.org/viz

machine.js

  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
  const goLeft = assign({
    tabIndex: (context, event) => Math.max(context.slideIndex - 1, 0)
  });
  
  const goRight = assign({
    tabIndex: (context, event) => Math.min(context.slideIndex + 1, context.slideCount - 1)
  });

  const goHome = assign({
    tabIndex: (context, event) => 0
  });

  const goEnd = assign({
    tabIndex: (context, event) => context.slideCount - 1
  });
  
  const fetchMachine = Machine({
    id: 'fetch',
    initial: 'unfocused',
    context: {
      slideCount: 5,
      slideIndex: 0
    },
    states: {
      unfocused: {
        on: {
          FOCUS: 'focusSlider'
        }
      },
      focusSlider: {
        on: {
          LEFT: {
            actions: goLeft
          },
          RIGHT: {
            actions: goRight
          },
          HOME: {
            actions: goHome
          },
          END: {
            actions: goEnd
          },
          TAB: 'focusContent',
        }
      },
      focusContent: {
        on: {SHIFT_TAB: 'focusSlider',}
      }
    }
  });