Wednesday, 31 May 2017

How Facebook, Slack or other social networks recognize page content?

I'm wondering how Facebook, Google, Slack or any other social network recognizes the content of a currently posted page? Anytime, when you add a link to some page (for example photo page) it will automatically create a preview with an image and title of that page...

I'm trying to create similar functionality by using NodeJS...

Any idea? Tnx.

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via Eugene Vilder

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