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ui/src/app/pipes/empty.pipe.ts

@@ -5,7 +5,8 @@ import { isEmptyObject } from '../util/misc.util'
   name: 'empty',
 })
 export class EmptyPipe implements PipeTransform {
-  transform (obj: { }): boolean {
-    return isEmptyObject(obj)
+  transform (val: object | [] = { }): boolean {
+    if (Array.isArray(val)) return !val.length
+    return isEmptyObject(val)
   }
 }

ui/src/app/pipes/typeof.pipe.ts

@@ -5,6 +5,12 @@ import { Pipe, PipeTransform } from '@angular/core'
 })
 export class TypeofPipe implements PipeTransform {
   transform (value: any): any {
+    if (value === null) {
+      return 'null'
+    } else if (Array.isArray(value)) {
+      return 'array'
+    }
+
     return typeof value
   }
 }