fix: check if dummyNode is on the targetNode

Author: aminya

lib/dom-styles-reader.js

@@ -21,6 +21,9 @@ export default class DOMStylesReader {
      */
     this.dummyNode = undefined
 
+    // used to check if the dummyNode is on the current targetNode
+    this.targetNode = undefined
+
     /**
      * Set to true once tokenized
      * @access private
@@ -99,12 +102,13 @@ export default class DOMStylesReader {
    * @access private
    */
   ensureDummyNodeExistence (targetNode) {
-    if (this.dummyNode === undefined) {
+    if (this.targetNode !== targetNode || this.dummyNode === undefined) {
       this.dummyNode = document.createElement('span')
       this.dummyNode.style.visibility = 'hidden'
 
       // attach to the target node
       targetNode.appendChild(this.dummyNode)
+      this.targetNode = targetNode
     }
   }