export const buildDeprecatedPropsWarning = message => { let alreadyWarned = false; if (process.env.NODE_ENV === 'production') { return () => {}; } const cleanMessage = Array.isArray(message) ? message.join('\n') : message; return deprecatedProps => { const deprecatedKeys = Object.entries(deprecatedProps).filter(([, value]) => value !== undefined).map(([key]) => `- ${key}`); if (!alreadyWarned && deprecatedKeys.length > 0) { alreadyWarned = true; console.warn([cleanMessage, 'deprecated props observed:', ...deprecatedKeys].join('\n')); } }; };