diff --git a/src/datomish/datom.cljc b/src/datomish/datom.cljc
index 78b61b9f..32533a63 100644
--- a/src/datomish/datom.cljc
+++ b/src/datomish/datom.cljc
@@ -122,7 +122,8 @@
     :v     (Datom. (.-e d) (.-a d) v       (.-tx d) (.-added d))
     :tx    (Datom. (.-e d) (.-a d) (.-v d) v        (.-added d))
     :added (Datom. (.-e d) (.-a d) (.-v d) (.-tx d) v)
-    (throw (IllegalArgumentException. (str "invalid key for #datascript/Datom: " k)))))
+    #?(:clj  (throw (IllegalArgumentException. (str "invalid key for #datascript/Datom: " k)))
+       :cljs (throw (js/Error. (str "invalid key for #datascript/Datom: " k))))))
 
 ;; printing and reading
 
diff --git a/src/datomish/schema.cljc b/src/datomish/schema.cljc
index ddff77b4..c2ef2e02 100644
--- a/src/datomish/schema.cljc
+++ b/src/datomish/schema.cljc
@@ -85,9 +85,9 @@
   {:db.type/ref     { :valid? #(and (integer? %) (pos? %)) :->SQLite identity :<-SQLite identity }
    :db.type/keyword { :valid? keyword? :->SQLite str :<-SQLite #(keyword (subs % 1)) }
    :db.type/string  { :valid? string? :->SQLite identity :<-SQLite identity }
-   :db.type/boolean { :valid? #(instance? Boolean %) :->SQLite #(if % 1 0) :<-SQLite #(if (= % 1) true false) }
+   :db.type/boolean { :valid? #?(:clj #(instance? Boolean %) :cljs #(= js/Boolean (type %))) :->SQLite #(if % 1 0) :<-SQLite #(if (= % 1) true false) }
    :db.type/integer { :valid? integer? :->SQLite identity :<-SQLite identity }
-   :db.type/real    { :valid? float? :->SQLite identity :<-SQLite identity }
+   :db.type/real    { :valid? #?(:clj float? :cljs number?) :->SQLite identity :<-SQLite identity }
    })
 
 (defn #?@(:clj  [^Boolean ensure-valid-value]
diff --git a/src/datomish/util.cljc b/src/datomish/util.cljc
index 96027bb9..aa9c205e 100644
--- a/src/datomish/util.cljc
+++ b/src/datomish/util.cljc
@@ -36,7 +36,7 @@
   (if (and (symbol? x)
            (str/starts-with? (name x) "?"))
     (keyword (subs (name x) 1))
-    (raise-str x " is not a Datalog var.")))
+    (throw (ex-info (str x " is not a Datalog var.") {}))))
 
 (defn conj-in
   "Associates a value into a sequence in a nested associative structure, where
diff --git a/test/datomish/db_test.cljc b/test/datomish/db_test.cljc
index 7ec2d5ee..8c4bf97e 100644
--- a/test/datomish/db_test.cljc
+++ b/test/datomish/db_test.cljc
@@ -32,6 +32,9 @@
   #?(:clj
      (:import [datascript.db DB])))
 
+#?(:cljs
+   (def Throwable js/Error))
+
 (defn- <datoms [db]
   (let [entids (zipmap (vals (dm/idents db)) (keys (dm/idents db)))]
     (go-pair