Office 365 Javascript API: context.mailbox.item.attachments is undefined

Question

Following the documentation here https://docs.microsoft.com/en-us/office/dev/add-ins/reference/objectmodel/requirement-set-1.7/office.context.mailbox.item#attachments-arrayattachmentdetailsjavascriptapioutlook17officeattachmentdetails

When I try to access the attachments as per the documentation:

var _Item = Office.context.mailbox.item;
var outputString = "";

if (_Item.attachments.length > 0) {
  for (i = 0 ; i < _Item.attachments.length ; i++) {
    var _att = _Item.attachments[i];
    outputString += "<BR>" + i + ". Name: ";
    outputString += _att.name;
    outputString += "<BR>ID: " + _att.id;
    outputString += "<BR>contentType: " + _att.contentType;
    outputString += "<BR>size: " + _att.size;
    outputString += "<BR>attachmentType: " + _att.attachmentType;
    outputString += "<BR>isInline: " + _att.isInline;
  }
}

// Do something with outputString

the returned value is undefined.

The attached file is not of a type on the blocked attachments type list linked in that documentation page.

Please help me understand what I'm doing wrong. The code is being called from an existing 365 add-in that is currently available on the 365 store, from a file where we access the Office 365 Javascript API. The call that I made in the provided screenshot happens directly after we successfully retrieve the 'to', 'cc', and 'bcc' values for the same email item, using the same JS API method Office.context.mailbox.item

Is the message in Read mode or Compose mode (i.e. a received message or a draft)? And does this happen with all attachments or just for a particular attachment? — Outlook Add-ins Team - MSFT
This happens in compose mode, with all attachments that I've tried so far. — evanchurchill
Just realized after answering your question that it is only available in the "Read" context, as per the docs. Thanks! Is there a way to get attachments from the "compose" context, without hitting the REST API? — evanchurchill

evanchurchill evanchurchill · Accepted Answer · 2018-12-14T19:56:30

2

votes

RTFM - the method is only available in the "Read" context, not in the "Compose" context.

Office 365 Javascript API: context.mailbox.item.attachments is undefined

1 Answers