diff --git a/js/src/tooltip.js b/js/src/tooltip.js
index cdc9b1e5d5..d69a80e275 100644
--- a/js/src/tooltip.js
+++ b/js/src/tooltip.js
@@ -685,14 +685,15 @@ class Tooltip extends BaseComponent {
   _getDelegateConfig() {
     const config = {}
 
-    if (this._config) {
-      for (const key in this._config) {
-        if (this.constructor.Default[key] !== this._config[key]) {
-          config[key] = this._config[key]
-        }
+    for (const key in this._config) {
+      if (this.constructor.Default[key] !== this._config[key]) {
+        config[key] = this._config[key]
       }
     }
 
+    // In the future can be replaced with:
+    // const keysWithDifferentValues = Object.entries(this._config).filter(entry => this.constructor.Default[entry[0]] !== this._config[entry[0]])
+    // `Object.fromEntries(keysWithDifferentValues)`
     return config
   }