I want to share some dynamic content on google+. For this I checked it https://developers.google.com/+/web/share/interactive#rendering_the_button_with_javascript
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I did a stupid thing which took a few minutes to resolve, so I thought I would post a warning in case somebody else falls in this trap.
In the console, when origins are displayed, 'Redirect URIs' come above 'Javascript origins'. When you open the edit pane, it's the other way around, so if you are not paying attention, you could paste your origins in the Redirect URIs field and ....