Uncaught TypeError: Failed to execute 'unobserve' on 'ResizeObserver': parameter 1 is not of type 'Element'.

[shahnad]

Hi,
I don't know why this happening.
if anyone can reproduce it. it will be appreciatable. Thanks

"react-range": "^1.8.14",

[bertuck]

Patch to apply via patch-package to resolve issue : (waiting for PR to be merged #182)

react-range+1.8.14.patch

diff --git a/node_modules/react-range/lib/Range.js b/node_modules/react-range/lib/Range.js
index 2403f9d..f276ec3 100644
--- a/node_modules/react-range/lib/Range.js
+++ b/node_modules/react-range/lib/Range.js
@@ -68,6 +68,10 @@ var Range = /** @class */ (function (_super) {
         _this.getOffsets = function () {
             var _a = _this.props, direction = _a.direction, values = _a.values, min = _a.min, max = _a.max;
             var trackElement = _this.trackRef.current;
+            if (!trackElement) {
+                console.warn('No track element found.');
+                return [];
+            }
             var trackRect = trackElement.getBoundingClientRect();
             var trackPadding = (0, utils_1.getPaddingAndBorder)(trackElement);
             return _this.getThumbs().map(function (thumb, index) {
@@ -523,7 +527,9 @@ var Range = /** @class */ (function (_super) {
         document.removeEventListener('touchstart', this.onMouseOrTouchStart);
         document.removeEventListener('mouseup', this.schdOnEnd);
         document.removeEventListener('touchend', this.schdOnEnd);
-        this.resizeObserver.unobserve(this.trackRef.current);
+        if (this.trackRef && this.trackRef.current) {
+            this.resizeObserver.unobserve(this.trackRef.current);
+        }
     };
     Range.prototype.render = function () {
         var _this = this;