diff --git a/js/src/common/utils/computed.ts b/js/src/common/utils/computed.ts
index 44e5e7e98..5441824c1 100644
--- a/js/src/common/utils/computed.ts
+++ b/js/src/common/utils/computed.ts
@@ -2,12 +2,12 @@
  * The `computed` utility creates a function that will cache its output until
  * any of the dependent values are dirty.
  *
- * @param {...String} dependentKeys The keys of the dependent values.
- * @param {function} compute The function which computes the value using the
+ * @param dependentKeys The keys of the dependent values.
+ * @param compute The function which computes the value using the
  *     dependent values.
  */
 export default function computed(dependentKeys: string | string[], compute: Function): () => any {
-    const keys = Array.from(dependentKeys);
+    const keys = [].concat(dependentKeys);
 
     const dependentValues = {};
     let computedValue;