@reactivex/rxjs/src/util/tryCatch.ts

Reactive Extensions for modern JavaScript

import {errorObject} from './errorObject';

let tryCatchTarget: Function;

function tryCatcher(): any {
  try {
    return tryCatchTarget.apply(this, arguments);
  } catch (e) {
    errorObject.e = e;
    return errorObject;
  }
}

export function tryCatch<T extends Function>(fn: T): T {
  tryCatchTarget = fn;
  return <any>tryCatcher;
};