Function initializeResponse

out/cli.cjs:59047–59077

(response, init, body)

      } else {
        assert2(false);
      }
    }
    function makeAppropriateNetworkError(fetchParams, err = null) {
      assert2(isCancelled(fetchParams));
      return isAborted(fetchParams) ? makeNetworkError(Object.assign(new DOMException3("The operation was aborted.", "AbortError"), { cause: err })) : makeNetworkError(Object.assign(new DOMException3("Request was cancelled."), { cause: err }));
    }
    function initializeResponse(response, init, body) {
      if (init.status !== null && (init.status < 200 || init.status > 599)) {
        throw new RangeError('init["status"] must be in the range of 200 to 599, inclusive.');
      }
      if ("statusText" in init && init.statusText != null) {
        if (!isValidReasonPhrase(String(init.statusText))) {
          throw new TypeError("Invalid statusText");
        }
      }
      if ("status" in init && init.status != null) {
        response[kState].status = init.status;
      }
      if ("statusText" in init && init.statusText != null) {
        response[kState].statusText = init.statusText;
      }
      if ("headers" in init && init.headers != null) {
        fill(response[kHeaders], init.headers);
      }
      if (body) {
        if (nullBodyStatus.includes(response.status)) {
          throw webidl.errors.exception({
            header: "Response constructor",
            message: "Invalid response status code " + response.status
          });
        }
        response[kState].body = body.body;
        if (body.type != null && !response[kState].headersList.contains("Content-Type")) {
          response[kState].headersList.append("content-type", body.type);