Using custom configuration, you can set fields to show or hide based on values selected in another field.

The rules added for skip logic is only reflected on add/edit pages. The overview page is a superset of all fields described in the data dictionary.

Example 1: Show custom field(Relation to Proband) if value selected in 'Proband'(RB10) field is 'No'

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{
          "name": "cpr.participant.extensionDetail.attrsMap.DD15",
          "caption": "Relation To Proband",
          "type": "dropdown",
          "optional": true,
          "showIf": {
            "op": "AND",
            "rules": [
              {
                "field": "cpr.participant.extensionDetail.attrsMap.RB10",
                "op": "==",
                "value": "'No'"
              }
            ]
          },
          "listSource": {
            "apiUrl": "forms/permissible-values",
            "selectProp": "value",
            "displayProp": "value",
            "queryParams": {
              "dynamic": {},
              "static": {
                "formName": "kMCParticipantExtension",
                "controlName": "DD15"
              }
            }
          }
        }

Screenshot when the field is shown:

Screenshot when the field is hidden:

Example 2: Show 'Storage tube' custom field only during the creation of aliquots.

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{
          "name": "specimen.extensionDetail.attrsMap.ST3",
          "caption": "Storage tube",
          "type": "text",
          "optional": "true",
          "showIf": {
              "op": "AND",
              "rules": [
                {
                  "field": "specimen.lineage",
                  "op": "==",
                  "value": "'Aliquot'"
                }
              ]
            }
        }

Example 3: Show 'COVID-19 Test Date' visit custom field when the visit date is after '23 January 2020'.

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{
      "name" : "visit.extensionDetail.attrsMap.DP13",
      "caption" : "COVID-19 Test Date",
      "type" : "date",
      "dateOnly" : true,
      "optional" : true,
      "showIf" : {
        "op" : "AND",
        "rules" : [ {
          "field" : "visit.visitDate",
          "op" : ">=",
          "value" : "1579717800000"
        } ]
      },
      "showInOverviewIf" : "useShowIf"
    }

"1579717800000" is the number of milliseconds elapsed since Unix time Epoch on 23/01/2020 at 00:00:00 hrs UTC.

The number can be obtained from the sites like https://currentmillis.com/

Example 4: Show 'Upload image' specimen custom field when it's primary specimen (lineage is 'New') and type is 'Whole Blood'.

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 {
   "name" : "specimen.extensionDetail.attrsMap.FU2",
   "caption" : "Upload image",
   "type" : "file",
   "optional" : true,
   "showInOverviewIf" : "useShowIf",
   "showIf" : {
           "op" : "AND",
           "rules" : [ {
             "field": "specimen.lineage",
             "op": "==",
             "value": "'New'"
           },{
             "field" : "Specimen.type",
             "op" : "==",
             "value" : "'Whole Blood'"
         } ]
       }
 },

The field looks like below on the specimen overview page:

Hide/Unhide Fields Based on Value of Another Field

Example 1: Show custom field(Relation to Proband) if value selected in 'Proband'(RB10) field is 'No'

Example 2: Show 'Storage tube' custom field only during the creation of aliquots.

Example 3: Show 'COVID-19 Test Date' visit custom field when the visit date is after '23 January 2020'.

Example 4: Show 'Upload image' specimen custom field when it's primary specimen (lineage is 'New') and type is 'Whole Blood'.