Page node menu, is-selected - How to?

[Old Nick]

Regarding this thread : https://xenforo.com/community/threads/is-selected-how-to.223700/
I want to do the same kind of menu but with page nodes, i tried this but it does not work...
HTML:

<a href="/-/podcasts/" class="blockLink {{ $node.node_id == $page.node_id ? 'is-selected' : '' }}">page A</a>
I dumped vars and node_id is available...
I'm surely missing something.
Thanks for any help.
Page node menu, is-selected - How to?

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