Function isTTY

packages/prompts/src/common.ts:8–10

(output: Writable)

export const unicode = isUnicodeSupported();
export const isCI = (): boolean => process.env.CI === 'true';
export const isTTY = (output: Writable): boolean => {
	return (output as Writable & { isTTY?: boolean }).isTTY === true;
};
export const unicodeOr = (c: string, fallback: string) => (unicode ? c : fallback);
export const S_STEP_ACTIVE = unicodeOr('◆', '*');
export const S_STEP_CANCEL = unicodeOr('■', 'x');