Send values from pages to the root page of my tabs

According to the docs, by using [rootParams]="…" I can send values from my ion-tab to a page.

How can I do the reverse? I want to send values from my page to the root page of my tabs.

I want to disable some tabs when my page has specific states …

Thank you!

In general, I think this indicative of flawed design, because tabs are for the user to freely choose between various “subapps”. However, if you insist, I would suggest using an Observable to communicate between whatever is trying to disable tabs and the tab-holding page that has that ability.