Function normalizeKeyName

packages/hotkeys/src/constants.ts:457–481

(key: string)

 * ```
 */
export function normalizeKeyName(key: string): string {
  // key can be undefined in rare cases
  // (browser extensions synthesizing key events, accessibility tools, certain OS/browser combinations).
  if (!key) return ''
  // Check aliases first
  if (key in KEY_ALIASES) {
    return KEY_ALIASES[key]!
  }

  if (isSingleLetterKey(key)) {
    const upper = key.toUpperCase()
    // Some Unicode letters (e.g., 'ß') uppercase to multi-character sequences
    // ('SS'). Avoid changing the string length so the rest of the matching
    // logic can rely on a stable single-character key value.
    return upper.length === 1 ? upper : key
  }

  // Check if it's a function key (normalize case)
  const upperKey = key.toUpperCase()
  if (/^F([1-9]|1[0-2])$/.test(upperKey)) {
    return upperKey
  }

  return key
}

// =============================================================================
// Display Symbols