Hi! I like this feature in Excel Desktop, but when I try to use it in Excel Online, this feature does not work. Also Script Lab example does not achieve the result.

Hi @eldargum,
Thank you for reporting this issue. The addFromBase64 method is currently in preview, so you will currently need to be in Office Insiders to use it. Which version of Excel Online are you using?
I'm Office Insider. Excel Online build = 16.0.11421.31876
Thanks for providing that information. I've confirmed the sample gives a "NotImplemented" error when calling WorksheetCollection.addFromBase64 with the latest version as well.
I'll transfer this issue to the office-js repo so the product team is aware. They can give you an estimate for when there will be parity between desktop and online.
(Transferring this issue to OfficeDev/office-js, as described previously by @AlexJerabek.)
please note that API is on preview right now, so to some degree its ok that it will not work in other platforms.
Hello, any news of when this API is going to be available in production?
This is also of great interest to us. We've completed a proof of concept that depends on this capability, but it really doesn't help until its also available in Excel online. Any update when it might become available for Excel online?
@FelipeCostaGualberto @JoshSales , the production team is working on pushing the API move forward. If you would like to provide more information and feedbacks for this API, could you help to take a quick survey https://forms.office.com/Pages/ResponsePage.aspx?id=v4j5cvGGr0GRqy180BHbR5eAlIUFFQFHqE95qTMqQuVUM0I4T05BWDkyS0ZBQjNLSzJNRkNQMzNQUy4u Thanks!
The provided URL to the survey doesn’t work.
josh
From: Ruoying Liang notifications@github.com
Sent: Monday, June 08, 2020 1:12 AM
To: OfficeDev/office-js office-js@noreply.github.com
Cc: JoshSales jsale@tril.com; Mention mention@noreply.github.com
Subject: Re: [OfficeDev/office-js] sheets.addFromBase64 doesn't work in excel online (#414)
@FelipeCostaGualberto https://github.com/FelipeCostaGualberto @JoshSales https://github.com/JoshSales , the production team is working on pushing the API move forward. If you would like to provide more information and feedbacks for this API, could you help to take a quick survey https://forms.office.com/Pages/ResponsePage.aspx?id=v4j5cvGGr0GRqy180BHbR5eAlIUFFQFHqE95qTMqQuVUM0I4T05BWDkyS0ZBQjNLSzJNRkNQMzNQUy4u Thanks!
—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub https://github.com/OfficeDev/office-js/issues/414#issuecomment-640442490 , or unsubscribe https://github.com/notifications/unsubscribe-auth/APUWNHDKS3PPIXYZ6KEHFMDRVSMMHANCNFSM4G365TAA . https://github.com/notifications/beacon/APUWNHABNW24DJEP7TAGDKDRVSMMHA5CNFSM4G365TAKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEYWGA6Q.gif
@JoshSales It works, just don't click on it. Instead, copy the URL text and paste in the address bar.
Thank you!
From: Felipe Costa Gualberto notifications@github.com
Sent: Monday, June 08, 2020 8:30 AM
To: OfficeDev/office-js office-js@noreply.github.com
Cc: JoshSales jsale@tril.com; Mention mention@noreply.github.com
Subject: Re: [OfficeDev/office-js] sheets.addFromBase64 doesn't work in excel online (#414)
@JoshSales https://github.com/JoshSales It works, just don't click on it. Instead, copy the URL text and paste in the address bar.
—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub https://github.com/OfficeDev/office-js/issues/414#issuecomment-640702442 , or unsubscribe https://github.com/notifications/unsubscribe-auth/APUWNHCKYHZOFLILAOVYM5TRVT7W7ANCNFSM4G365TAA . https://github.com/notifications/beacon/APUWNHHIPQI2HW5TUYT5OJTRVT7W7A5CNFSM4G365TAKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEYYFP2Q.gif