ews-js-api-browser

ews-js-api-browser

Exchange Web Service in JavaScript/TypeScript. For ionic/electron/Outlook Add-In (mail apps) and other browser process.

built for ionic, electron and Outlook Add-In (mail apps) from https://github.com/gautamsi/ews-javascript-api
based on ews-javascript-api@0.9.1

installing (for ionic/cordova)

npm install ews-js-api-browser

building

install typescript globally npm install -g typescript
then run tsc or npm run build from command prompt run npm run build:outlook (windows only) to build for Outlook Add-in/Mail apps.

use in Ionic/cordova

npm install works, use loaders like webpack. use in ionic/electron/webview, open issues at original repo. if you are using plain js/ts in cordova, see last section for this.

ionic serve will have CORS issue, You want to test in emulator directly. You can also enable CORS in Chrome (chrome based browsers) by installing plugin from chrome web store Allow-Control-Allow-Origin: *

this may affect other browser based process. electron does not have this issue

webpack uglify hangs and ultimately logs following error for me, probably due to very large file, I will see if I can fix this without making single file, ultimately current implementation loads all file so not much difference.

<--- Last few GCs --->

[107880:000002A361520F20]    16262 ms: Mark-sweep 1393.6 (1448.1) -> 1393.5 (1415.1) MB, 280.1 / 0.0 ms  last resort
[107880:000002A361520F20]    16472 ms: Mark-sweep 1393.5 (1415.1) -> 1393.5 (1415.1) MB, 209.9 / 0.0 ms  last resort


<--- JS stacktrace --->

==== JS stack trace =========================================

Security context: 000000E5FE6A66A1 <JS Object>
    1: RegExpReplace [native regexp.js:~356] [pc=000002C27BC3C9A4](this=000002255C9F2D61 <JS RegExp>,z=000000160878A0C1 <Very long string[3071091]>,ak=000000E5FE6C15A1 <String[1]\: \n>)
    2: 000003B7485C9C21 <Symbol: Symbol.replace>(aka [Symbol.replace]) [native regexp.js:1] [pc=000002C27C3AD329](this=000002255C9F2D61 <JS RegExp>,z=000000160878A0C1 <Very long string[3071091]>,ak=000000E5FE6...

FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory

How to for Outlook Apps

Working with modules

If you are using webpack/requirejs, just install using npm and configure loaders appropriately. dependency needed: base64-js, moment-timezone & uuid. moment is also needed as dependency to moment-timezone.
Follow examples from ews-jsvascript-api

Working without module loaders

see next section

Working with plain js/ts (no module loaders/bundlers)

you have to copy dist/outlook/ExchangeWebService.js (and dist/outlook/ExchangeWebService.d.ts if you need typing support in typescript) to your project/scripts directory, include ExchangeWebService.js in html file (<script> tag). This exposes a global namespace EwsJS.

for outlook add-ins/mail apps, configure for outlook by caling call EwsJS.ConfigureForOutlook() inside Office.initialize.

specific example on how to use this way.

// The Office initialize function must be run each time a new page is loaded.
  Office.initialize = function (reason) {
      EwsJS.ConfigureForOutlook(); // only needed in outlook add-ins, not needed for other browser based process
    $(document).ready(function () {
      var element = document.querySelector('.ms-MessageBanner');
      messageBanner = new fabric.MessageBanner(element);
      messageBanner.hideBanner();
      loadProps();
      EwsJS.EwsLogging.DebugLogEnabled = false;
      var exch = new EwsJS.ExchangeService(EwsJS.ExchangeVersion.Exchange2013);
      exch.Credentials = new EwsJS.WebCredentials("user","password"); // any fake stuff needed, it is not used properly
      exch.Url = new EwsJS.Uri("https://outlook.office365.com/Ews/Exchange.asmx"); // anything valid url

      EwsJS.Folder.Bind(exch, new EwsJS.FolderId(EwsJS.WellKnownFolderName.MsgFolderRoot))
        .then(function (root) {
          return root.FindFolders(new EwsJS.FolderView(100));
        }).then(function (subfolders) {
          subfolders.Folders.forEach(function (f) {
              console.log(f.DisplayName + " : " + f.FolderClass + " : " + f.TotalCount); // just logging here, do what you want.
          });
      }).catch(function (err) {
          console.log("Error occurred");
          console.log(err);
      });
    });
  };