diff --git a/node_modules/flatpickr/dist/esm/index.js b/node_modules/flatpickr/dist/esm/index.js
index 6e4d05f..167792c 100644
--- a/node_modules/flatpickr/dist/esm/index.js
+++ b/node_modules/flatpickr/dist/esm/index.js
@@ -1977,7 +1977,7 @@ function FlatpickrInstance(element, instanceConfig) {
 function _flatpickr(nodeList, config) {
     var nodes = Array.prototype.slice
         .call(nodeList)
-        .filter(function (x) { return x instanceof HTMLElement; });
+        .filter(function (x) { return x && x.nodeType === 1; });
     var instances = [];
     for (var i = 0; i < nodes.length; i++) {
         var node = nodes[i];
@@ -2011,7 +2011,7 @@ var flatpickr = function (selector, config) {
     if (typeof selector === "string") {
         return _flatpickr(window.document.querySelectorAll(selector), config);
     }
-    else if (selector instanceof Node) {
+    else if (selector && typeof selector.nodeType === "number") {
         return _flatpickr([selector], config);
     }
     else {
diff --git a/node_modules/flatpickr/dist/flatpickr.js b/node_modules/flatpickr/dist/flatpickr.js
index 2bcc9f3..48381a7 100644
--- a/node_modules/flatpickr/dist/flatpickr.js
+++ b/node_modules/flatpickr/dist/flatpickr.js
@@ -2642,7 +2642,7 @@
         // static list
         var nodes = Array.prototype.slice
             .call(nodeList)
-            .filter(function (x) { return x instanceof HTMLElement; });
+            .filter(function (x) { return x && x.nodeType === 1; });
         var instances = [];
         for (var i = 0; i < nodes.length; i++) {
             var node = nodes[i];
@@ -2679,7 +2679,7 @@
         if (typeof selector === "string") {
             return _flatpickr(window.document.querySelectorAll(selector), config);
         }
-        else if (selector instanceof Node) {
+        else if (selector && typeof selector.nodeType === "number") {
             return _flatpickr([selector], config);
         }
         else {