redux-observable/src/utils/console.ts

RxJS based middleware for Redux. Compose and cancel async actions and more.

let deprecationsSeen: { [key: string]: boolean } = {};
export const resetDeprecationsSeen = (): void => {
  deprecationsSeen = {};
};

const consoleWarn =
  typeof console === 'object' && typeof console.warn === 'function'
    ? console.warn.bind(console)
    : () => {};

export const deprecate = (msg: string): void => {
  if (!deprecationsSeen[msg]) {
    deprecationsSeen[msg] = true;
    consoleWarn(`redux-observable | DEPRECATION: ${msg}`);
  }
};

export const warn = (msg: string): void => {
  consoleWarn(`redux-observable | WARNING: ${msg}`);
};