Function transformCase

src/utils/caseTransform.ts:120–170

(input: string, style?: string)

}

export function transformCase(input: string, style?: string): string {
	const normalized = normalizeStyle(style);
	if (!normalized) return input;

	if (normalized === "lower") return input.toLowerCase();
	if (normalized === "upper") return input.toUpperCase();

	const words = tokenizeWords(input);
	if (words.length === 0) return "";

	switch (normalized) {
		case "kebab":
			return words.map((w) => w.toLowerCase()).join("-");
		case "snake":
			return words.map((w) => w.toLowerCase()).join("_");
		case "camel": {
			const [first, ...rest] = words;
			const firstOut = first
				? isLowerLeadingBrandToken(first)
					? first
					: first.toLowerCase()
				: "";
			const restOut = rest.map((word) => {
				if (isAcronym(word) || isMixedCase(word)) return word;
				return upperFirstLowerRest(word);
			});
			return [firstOut, ...restOut].join("");
		}
		case "pascal":
			return words
				.map((word) => {
					if (isAcronym(word) || isMixedCase(word)) return word;
					return upperFirstLowerRest(word);
				})
				.join("");
		case "title":
			return words
				.map((word) => {
					if (isAcronym(word) || isMixedCase(word)) return word;
					return upperFirstLowerRest(word);
				})
				.join(" ");
		case "slug": {
			const slug = words.map((w) => w.toLowerCase()).join("-");
			if (isReservedWindowsDeviceName(slug)) return `${slug}-`;
			return slug;
		}
		default:
			return input;
	}
}