fix: add patch to removeChild to address hydration errors (#207)

Author: tyiuhc

packages/experiment-tag/src/experiment.ts

@@ -33,6 +33,7 @@ import {
 import { setMarketingCookie } from './util/cookie';
 import { getInjectUtils } from './util/inject-utils';
 import { VISUAL_EDITOR_SESSION_KEY, WindowMessenger } from './util/messenger';
+import { patchRemoveChild } from './util/patch';
 import {
   getStorageItem,
   setStorageItem,
@@ -190,6 +191,7 @@ export class DefaultWebExperimentClient implements WebExperimentClient {
     if (this.isRunning) {
       return;
     }
+    patchRemoveChild();
     const urlParams = getUrlParams();
     this.isVisualEditorMode =
       urlParams['VISUAL_EDITOR'] === 'true' ||

packages/experiment-tag/src/util/patch.ts

@@ -0,0 +1,12 @@
+/**
+ * Patch removeChild to avoid errors when removing nodes that are added
+ * mutate/inject actions.
+ */
+export const patchRemoveChild = () => {
+  HTMLElement.prototype.removeChild = function <T extends Node>(n: T): T {
+    if (!n || n.parentNode === this) {
+      return Node.prototype.removeChild.call(this, n) as T;
+    }
+    return n;
+  };
+};