Use JavaScript strict mode.

src/samples/conference/public/scripts/rest-sample.js

@@ -4,6 +4,7 @@
 
 // REST samples. It sends HTTP requests to sample server, and sample server sends requests to conference server.
 // Both this file and sample server are samples.
+'use strict';
 var send = function (method, path, body, onRes, host) {
     var req = new XMLHttpRequest()
     req.onreadystatechange = function () {

src/samples/p2p/js/sc.websocket.js

@@ -2,6 +2,7 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+'use strict';
 /**
  * @class SignalingChannel
  * @classDesc Signaling module for Open WebRTC Toolkit P2P chat

src/samples/p2p/peercall.html

@@ -105,6 +105,7 @@ <h2>ScreenView</h2>
   <footer id="status"></footer>
   <div id="infoDiv"></div>
   <script type="text/javascript">
+    'use strict';
     var isVideo = 1;
     var serverAddress = 'http://example.com'; // Please change example.com to signaling server's address.
     const signaling = new SignalingChannel();

src/sdk/base/export.js

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+'use strict';
+
 export * from './mediastream-factory.js';
 export * from './stream.js';
 export * from './mediaformat.js';

src/sdk/base/logger.js

@@ -28,12 +28,13 @@
 
 /* global console,window */
 
+'use strict';
+
 /*
  * API to write logs based on traditional logging mechanisms: debug, trace,
  * info, warning, error
  */
 const Logger = (function() {
-  'use strict';
   const DEBUG = 0;
   const TRACE = 1;
   const INFO = 2;

src/sdk/conference/export.js

@@ -2,5 +2,7 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+'use strict';
+
 export {ConferenceClient} from './client.js';
 export {SioSignaling} from './signaling.js';

src/sdk/export.js

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+'use strict';
+
 import * as base from './base/export.js';
 import * as p2p from './p2p/export.js';
 import * as conference from './conference/export.js';

src/sdk/p2p/error.js

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+'use strict';
+
 export const errors = {
   // 2100-2999 for P2P errors
   // 2100-2199 for connection errors

src/sdk/p2p/export.js

@@ -2,5 +2,7 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+'use strict';
+
 export {default as P2PClient} from './p2pclient.js';
 export {P2PError} from './error.js';

src/sdk/rest/API.js

@@ -26,6 +26,8 @@
 
 // This file is borrowed from lynckia/licode with some modifications.
 
+'use strict';
+
 /*global require, CryptoJS, Buffer, url, http, https*/
 var Url = require("url");
 

src/sdk/rest/Base64.js

@@ -26,10 +26,11 @@
 
 // This file is borrowed from lynckia/licode with some modifications.
 
+'use strict';
+
 /*global unescape*/
 var OWT_REST = OWT_REST || {};
 OWT_REST.Base64 = (function(OWT_REST) {
-  "use strict";
   var END_OF_INPUT, base64Chars, reverseBase64Chars, base64Str, base64Count,
     i, setBase64Str, readBase64, encodeBase64, readReverseBase64, ntos,
     decodeBase64;

test/unit/resources/scripts/base.js

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+'use strict';
+
 import * as MediaStreamFactoryModule from '../../../../src/sdk/base/mediastream-factory.js';
 import * as StreamModule from '../../../../src/sdk/base/stream.js';
 import * as MediaFormatModule from '../../../../src/sdk/base/mediaformat.js'

test/unit/resources/scripts/conference.js

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+'use strict';
+
 import {ConferenceClient} from '../../../../src/sdk/conference/client.js';
 import * as StreamModule from '../../../../src/sdk/base/stream.js';
 import * as EventModule from '../../../../src/sdk/base/event.js'

test/unit/resources/scripts/p2p.js

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+'use strict';
+
 import P2PClient from '../../../../src/sdk/p2p/p2pclient.js';
 import SignalingChannel from './fake-p2p-signaling.js';
 import * as StreamModule from '../../../../src/sdk/base/stream.js';

test/unit/resources/scripts/runner.js

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+'use strict';
+
 import * as base from './base.js';
 import * as p2p from './p2p.js';
 import * as conference from './conference.js'