@mui/x-date-pickers/internals/utils/warning.js

The community edition of the Date and Time Picker components (MUI X).

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'));
    }
  };
};
export const buildWarning = (message, gravity = 'warning') => {
  let alreadyWarned = false;
  const cleanMessage = Array.isArray(message) ? message.join('\n') : message;
  return () => {
    if (!alreadyWarned) {
      alreadyWarned = true;
      if (gravity === 'error') {
        console.error(cleanMessage);
      } else {
        console.warn(cleanMessage);
      }
    }
  };
};