Generate og:image:width and og:image:height

[fritzmg]

When a content is shared on Facebook for the first time, the share dialogue won't show the og:image right away. There are two ways to make Facebook show the share image even when the URL is shared for the first time: https://stackoverflow.com/a/30361572/374996

Within Contao it probably makes sense to take the second approach, i.e. generating og:image:width and og:image:height.

Note: I realize your extension allows for more than one og:image to be present for legacy reasons. May be this feature should be dropped? I don't think there is any reason anymore to have more than one og:image defined.

[qzminski]

Note: I realize your extension allows for more than one og:image to be present for legacy reasons. May be this feature should be dropped? I don't think there is any reason anymore to have more than one og:image defined.

I think it's mostly there to give the user a choice which image he would like to use. Would it harm if we add og:image:width and og:image:height to all images?

[fritzmg]

I think it's mostly there to give the user a choice which image he would like to use.

Well, where can you do that? Facebook for instance does not offer to switch through multiple share images, when sharing a post.

Would it harm if we add og:image:width and og:image:height to all images?

I suppose not - though it would generate a lot of additional markup. Also, how would you be able to identify which og:image:width belongs to which og:image?

[qzminski]

Well, where can you do that? Facebook for instance does not offer to switch through multiple share images, when sharing a post.

This must have changed because at the time I developed this extension it was possible. Or was it another service... 🤔

I suppose not - though it would generate a lot of additional markup. Also, how would you be able to identify which og:image:width belongs to which og:image?

Just like a regular array: http://ogp.me/#array

[fritzmg]

This must have changed because at the time I developed this extension it was possible. Or was it another service... 🤔

Yeah, it was possible in the past. That's why I said "for legacy reasons" ;)

[qzminski]

I would preserve the multiple selection of images as the OpenGraph protocol is not a Facebook protocol and other services are potentially making use of those arrays. Agreed?

[fritzmg]

Agreed.

[qzminski]

Implemented in d177f82 but this can produce unexpected results because of contao/core-bundle#1214.

[fritzmg]

Yeah, see the comments though: you should just combine each og:image/og:image:width/og:image:height combo into one string.

[qzminski]

The 3223cd7 should do then.

[madmaharaja]

This must have changed because at the time I developed this extension it was possible. Or was it another service... 🤔

Yeah, it was possible in the past. That's why I said "for legacy reasons" ;)

Just bumped into this thread because I was looking for a way to add og:image:width and og:image:height to my page templates in Contao. Anyway, just for the record: It is still (or again?) possible to switch through and select from multiple ogimage files when sharing a URL on Facebook.

[fritzmg]

Yeah, I also noticed that this feature has returned on Facebook.