Function to use with JSON.stringify to print Error objects (typescript)

replacer.ts

function replaceErrors(key:any, value:any) {
    if (value instanceof Error) {
        var error : {[k: string]: any } = {};

        Object.getOwnPropertyNames(value).forEach(function (key) {
            error[key] = (value as {[k: string]: any })[key];
        });

        return error;
    }

    return value;
}

To use:

  try {
    // ...
  } catch(e) }
    console.log(JSON.stringify(e, replaceErrors));
  }