fix(browser): check for fetch on window (#131)

Author: yoshi-automation

protos/protos.json

@@ -16,6 +16,7 @@
 // ** https://github.com/googleapis/gapic-generator-typescript **
 // ** All changes to this file may be overwritten. **
 
+/* global window */
 import * as gax from 'google-gax';
 import {
  Callback,
@@ -27,6 +28,11 @@ import {
 import * as path from 'path';
 
 import * as protos from '../../protos/protos';
+/**
+ * Client JSON configuration object, loaded from
+ * `src/v1beta2/document_understanding_service_client_config.json`.
+ * This file defines retry strategy and timeouts for all API methods in this library.
+ */
 import * as gapicConfig from './document_understanding_service_client_config.json';
 import {operationsProtos} from 'google-gax';
 const version = require('../../../package.json').version;
@@ -82,9 +88,9 @@ export class DocumentUnderstandingServiceClient {
  * your project ID will be detected automatically.
  * @param {string} [options.apiEndpoint] - The domain name of the
  * API remote host.
- * @param {gax.ClientConfig} [options.clientConfig] - client configuration override.
- * TODO(@alexander-fenster): link to gax documentation.
- * @param {boolean} fallback - Use HTTP fallback mode.
+ * @param {gax.ClientConfig} [options.clientConfig] - Client configuration override.
+ * Follows the structure of {@link gapicConfig}.
+ * @param {boolean} [options.fallback] - Use HTTP fallback mode.
  * In fallback mode, a special browser-compatible transport implementation is used
  * instead of gRPC transport. In browser context (if the `window` object is defined)
  * the fallback mode is enabled automatically; set `options.fallback` to `false`
@@ -98,7 +104,9 @@ export class DocumentUnderstandingServiceClient {
  opts?.servicePath || opts?.apiEndpoint || staticMembers.servicePath;
  const port = opts?.port || staticMembers.port;
  const clientConfig = opts?.clientConfig ?? {};
- const fallback = opts?.fallback ?? typeof window !== 'undefined';
+ const fallback =
+ opts?.fallback ??
+ (typeof window !== 'undefined' && typeof window?.fetch === 'function');
  opts = Object.assign({servicePath, port, clientConfig, fallback}, opts);
 
  // If scopes are unset in options set scopes.
@@ -314,7 +322,7 @@ export class DocumentUnderstandingServiceClient {
  // -------------------
  processDocument(
  request: protos.google.cloud.documentai.v1beta2.IProcessDocumentRequest,
- options?: gax.CallOptions
+ options?: CallOptions
  ): Promise<
  [
  protos.google.cloud.documentai.v1beta2.IDocument,
@@ -327,7 +335,7 @@ export class DocumentUnderstandingServiceClient {
  >;
  processDocument(
  request: protos.google.cloud.documentai.v1beta2.IProcessDocumentRequest,
- options: gax.CallOptions,
+ options: CallOptions,
  callback: Callback<
  protos.google.cloud.documentai.v1beta2.IDocument,
  | protos.google.cloud.documentai.v1beta2.IProcessDocumentRequest
@@ -395,7 +403,7 @@ export class DocumentUnderstandingServiceClient {
  processDocument(
  request: protos.google.cloud.documentai.v1beta2.IProcessDocumentRequest,
  optionsOrCallback?:
- | gax.CallOptions
+ | CallOptions
  | Callback<
  protos.google.cloud.documentai.v1beta2.IDocument,
  | protos.google.cloud.documentai.v1beta2.IProcessDocumentRequest
@@ -421,12 +429,12 @@ export class DocumentUnderstandingServiceClient {
  ]
  > | void {
  request = request || {};
- let options: gax.CallOptions;
+ let options: CallOptions;
  if (typeof optionsOrCallback === 'function' && callback === undefined) {
  callback = optionsOrCallback;
  options = {};
  } else {
- options = optionsOrCallback as gax.CallOptions;
+ options = optionsOrCallback as CallOptions;
  }
  options = options || {};
  options.otherArgs = options.otherArgs || {};
@@ -442,7 +450,7 @@ export class DocumentUnderstandingServiceClient {
 
  batchProcessDocuments(
  request: protos.google.cloud.documentai.v1beta2.IBatchProcessDocumentsRequest,
- options?: gax.CallOptions
+ options?: CallOptions
  ): Promise<
  [
  LROperation<
@@ -455,7 +463,7 @@ export class DocumentUnderstandingServiceClient {
  >;
  batchProcessDocuments(
  request: protos.google.cloud.documentai.v1beta2.IBatchProcessDocumentsRequest,
- options: gax.CallOptions,
+ options: CallOptions,
  callback: Callback<
  LROperation<
  protos.google.cloud.documentai.v1beta2.IBatchProcessDocumentsResponse,
@@ -506,7 +514,7 @@ export class DocumentUnderstandingServiceClient {
  batchProcessDocuments(
  request: protos.google.cloud.documentai.v1beta2.IBatchProcessDocumentsRequest,
  optionsOrCallback?:
- | gax.CallOptions
+ | CallOptions
  | Callback<
  LROperation<
  protos.google.cloud.documentai.v1beta2.IBatchProcessDocumentsResponse,
@@ -534,12 +542,12 @@ export class DocumentUnderstandingServiceClient {
  ]
  > | void {
  request = request || {};
- let options: gax.CallOptions;
+ let options: CallOptions;
  if (typeof optionsOrCallback === 'function' && callback === undefined) {
  callback = optionsOrCallback;
  options = {};
  } else {
- options = optionsOrCallback as gax.CallOptions;
+ options = optionsOrCallback as CallOptions;
  }
  options = options || {};
  options.otherArgs = options.otherArgs || {};