Source code - Fluid Topics

Go to the Portal menu and open the Custom JavaScript section.

Copy and paste the following script:

// Variables
const PRIMARY_META = "prodname";
const SECONDARY_META = "vrm_version";

function hideSecondaryMeta() {
  document.querySelector(`.facets-section[data-ft-facet-id="${SECONDARY_META}"]`).style.display = "none";
}

function showSecondaryMeta() {
  document.querySelector(`.facets-section[data-ft-facet-id="${SECONDARY_META}"]`).style.display = "";
}

function isPrimaryMetaSelected(facets) {
  for (let fi = 0; fi < facets.length; ++fi) {
    if (facets[fi].key === PRIMARY_META) return true;
  }
  return false;
}

// When searching, show or hide SECONDARY_META depending on whether PRIMARY_META is selected
document.addEventListener("ft:analytics:userevents", function (event) {
  let events = event.detail;
  for (let event of events) {
    switch (event.name) {
      case "khub.search":
        let facets = event.parameters.searchQuery.facets;
        if (isPrimaryMetaSelected(facets)) {
          showSecondaryMeta();
        } else {
          hideSecondaryMeta();
        }
    }
  }
});

Replace the values of PRIMARY_META and SECONDARY_META.

Check the ID of a metadata key in the configuration of facets in the search page, or inspect the search page to retrieve the data-ft-facet-id.
Save.

Once saved, the facet Version (or PRIMARY_META) is not visible in the Search results page. Selecting one of the Product values (or SECONDARY_META) shows the Version facet and its associated values.

Source code - Fluid Topics - Latest

Conditional Facets in the Search Page