Method moveFocus

src/ink/focus.ts:110–131

(direction: 1 | -1, root: DOMElement)

  }

  private moveFocus(direction: 1 | -1, root: DOMElement): void {
    if (!this.enabled) return

    const tabbable = collectTabbable(root)
    if (tabbable.length === 0) return

    const currentIndex = this.activeElement
      ? tabbable.indexOf(this.activeElement)
      : -1

    const nextIndex =
      currentIndex === -1
        ? direction === 1
          ? 0
          : tabbable.length - 1
        : (currentIndex + direction + tabbable.length) % tabbable.length

    const next = tabbable[nextIndex]
    if (next) {
      this.focus(next)
    }
  }
}

function collectTabbable(root: DOMElement): DOMElement[] {