Okay, here’s a working solution. In my example, the Welcome Banner will be displayed on the /latest page only, regardless of users’ interface settings. I’ll let you customize it to display it for the /categories page only.
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Set the Welcome Link Banner show on setting to “all” or “discovery”, depending on the page(s) you want the banner to be displayed.
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Add this script in your theme:
<script type="text/discourse-plugin" version="1.4.0"> //shows the welcome banner only on the /latest page api.onPageChange(() => { const router = api.container.lookup('service:router'); if (router.currentRoute.name === 'discovery.latest') { document.body.classList.add('route-discovery-latest'); } else { document.body.classList.remove('route-discovery-latest'); } }); </script>
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Add this CSS to your theme:
body:not(.route-discovery-latest) .welcome-link-banner-connector { display: none; }
Reference used: