I want to access a PowerPoint document's core and custom properties in PowerPoint Office Addin. I can access these properties using Javascript API in Word and Excel Office Addins. https://learn.microsoft.com/en-us/javascript/api/word/word.customproperty?view=word-js-preview https://learn.microsoft.com/en-us/javascript/api/word/word.documentproperties?view=word-js-preview https://learn.microsoft.com/en-us/javascript/api/excel/excel.custompropertycollection?view=excel-js-preview https://learn.microsoft.com/en-us/javascript/api/excel/excel.documentproperties?view=excel-js-preview But I am unable to find any documentation related to javascript API to access PowerPoint document core or custom properties. Is it possible to access these properties using Javascript API? If so how can I access them?

Office.js for PowerPoint is the least developed version of the Office.js APIs. Here is Microsoft's page showing all available objects. If it's not on this page, it doesn't exist (yet): PowerPoint Package

How to Access Core Properties / Custom Properties in PowerPoint Office Addin Using Javascript API

Luqman-Ud-Din Muhammad 1

I want to access a PowerPoint document's core and custom properties in PowerPoint Office Addin.

I can access these properties using Javascript API in Word and Excel Office Addins.

But I am unable to find any documentation related to javascript API to access PowerPoint document core or custom properties.

Is it possible to access these properties using Javascript API? If so how can I access them?

2 answers

John Korchok 5,431 Reputation points

2022-10-26T17:44:15.74+00:00

Office.js for PowerPoint is the least developed version of the Office.js APIs. Here is Microsoft's page showing all available objects. If it's not on this page, it doesn't exist (yet): PowerPoint Package
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Sascha Günther 1

@Luqman-Ud-Din Muhammad I was just facing the same challenge, unfortunately Office.js API for PowerPoint still does not provide any function to retrieve custom document properties.

I implemented the following workaround:

Get PowerPoint OOXML using Office.context.document.getFileAsync
Parse XML content to retrieve custom properties, they are stored in the file /docProps/custom.xml

	<my_file path="docProps/" name="custom.xml">
		<Properties xmlns="http://schemas.openxmlformats.org/officeDocument/2006/custom-properties" xmlns:vt="http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes">
			<property fmtid="{D5CDD505-2E9C-101B-9397-08002B2CF9AE}" pid="2" name="MSIP_Label_87439970-2b0a-43db-8d36-4f1111a97b08_Enabled">
				<vt:lpwstr>true</vt:lpwstr>
			</property>
			<property fmtid="{D5CDD505-2E9C-101B-9397-08002B2CF9AE}" pid="3" name="MSIP_Label_87439970-2b0a-43db-8d36-4f1111a97b08_SetDate">
				<vt:lpwstr>2024-01-17T09:59:10Z</vt:lpwstr>
			</property>
			<property fmtid="{D5CDD505-2E9C-101B-9397-08002B2CF9AE}" pid="4" name="MSIP_Label_87439970-2b0a-43db-8d36-4f1111a97b08_Method">
				<vt:lpwstr>Privileged</vt:lpwstr>
			</property>
			<property fmtid="{D5CDD505-2E9C-101B-9397-08002B2CF9AE}" pid="5" name="MSIP_Label_87439970-2b0a-43db-8d36-4f1111a97b08_Name">
				<vt:lpwstr>f87e2893-b95b-4327-95e0-bf1075fe5eb5</vt:lpwstr>
			</property>
			<property fmtid="{D5CDD505-2E9C-101B-9397-08002B2CF9AE}" pid="6" name="MSIP_Label_87439970-2b0a-43db-8d36-4f1111a97b08_SiteId">
				<vt:lpwstr>f87e2893-b95b-4327-95e0-bf1075fe5eb5</vt:lpwstr>
			</property>
			<property fmtid="{D5CDD505-2E9C-101B-9397-08002B2CF9AE}" pid="7" name="MSIP_Label_87439970-2b0a-43db-8d36-4f1111a97b08_ActionId">
				<vt:lpwstr>f87e2893-b95b-4327-95e0-bf1075fe5eb5</vt:lpwstr>
			</property>
			<property fmtid="{D5CDD505-2E9C-101B-9397-08002B2CF9AE}" pid="8" name="MSIP_Label_9859f7d1-b5ca-451d-95f2-7d810ca64a9f_ContentBits">
				<vt:lpwstr>0</vt:lpwstr>
			</property>
		</Properties>
	</my_file>

Hope that helps!

Manuel 25 Reputation points

2024-04-09T14:56:09.0033333+00:00

Hi Sascha

I'm struggling to get the value of the custom.xml. How were you able to parse it inside your taskpane add-in?

Manuel 25

Got it working with JSZip:

const zip = new JSZip()
const zipData = await zip.loadAsync(binaryContent)
const file = zipData.file('docProps/custom.xml')
const ooxml = await file?.async('string')

Sascha Günther 1

Hi Manuel!

Great, that's similar to my solution. I used @zip.js/zip.js to parse the binary data into a string.


const byteArray = new Uint8Array(docdata);
const blob = new Blob([byteArray]);
const zipFileReader = new zip.BlobReader(blob);
const zipReader = new zip.ZipReader(zipFileReader);
const entries = (await zipReader.getEntries());

Then you can access each file by iterating through entries

for (const entry of entries) {
	console.log(entry.filename)
}

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