VueUiXy edge case fix

Author: graphieros

package-lock.json

@@ -1,7 +1,7 @@
 {
   "name": "vue-data-ui",
   "private": false,
-  "version": "2.0.14",
+  "version": "2.0.15",
   "type": "module",
   "description": "A user-empowering data visualization Vue components library",
   "keywords": [

package.json

@@ -1241,9 +1241,11 @@ export default {
     
             let minGap = 0;
             const sliderTrack = document.getElementById(`vue-ui-slider-track_${this.sliderId}`);
-    
-            sliderOne.addEventListener("input", slideOne);
-            sliderTwo.addEventListener("input", slideTwo);
+
+            if(sliderOne && sliderTwo) {
+                sliderOne.addEventListener("input", slideOne);
+                sliderTwo.addEventListener("input", slideTwo);
+            }
     
             function slideOne(){
                 if(parseInt(sliderTwo.value) - parseInt(sliderOne.value) <= minGap){