Function findControlCharacter

src/utils/validation.ts:10–18

(value: string)

 * Control characters: 0x00-0x1f and 0x7f (DEL).
 */
export function findControlCharacter(value: string): { position: number; hex: string } | null {
  for (let i = 0; i < value.length; i++) {
    const code = value.charCodeAt(i);
    if ((code >= 0x00 && code <= 0x1f) || code === 0x7f) {
      return { position: i, hex: `0x${code.toString(16).padStart(2, "0")}` };
    }
  }
  return null;
}

/**
 * Check whether a string contains any control characters.