refactor(core): Inline Vue ViewModel checks in normalize and safeJoin

The isVueViewModel() and getVueInternalName() functions from is.ts and
stacktrace.ts were only called from two sites: normalize.ts (stringifyValue)
and string.ts (safeJoin). Inlining the checks directly at these call sites
allows tree-shaking to eliminate the standalone function definitions from
bundles that pull in normalize/string but not is.ts for other reasons.

Uses the `in` operator instead of `as any` casts to satisfy the linter's
no-explicit-any / no-unsafe-member-access rules.

The Vue check prevents infinite console warning loops when stringifying
Vue 2/3 ViewModel instances or VNodes (see #8981).

Saves ~15 bytes gzipped on the base browser bundle.

Co-Authored-By: Claude claude@anthropic.com

Author: HazAT

packages/core/src/utils/normalize.ts

@@ -1,7 +1,7 @@
 import type { Primitive } from '../types-hoist/misc';
-import { isSyntheticEvent, isVueViewModel } from './is';
+import { isSyntheticEvent } from './is';
 import { convertToPlainObject } from './object';
-import { getFunctionName, getVueInternalName } from './stacktrace';
+import { getFunctionName } from './stacktrace';
 
 type Prototype = { constructor?: (...args: unknown[]) => unknown };
 // This is a hack to placate TS, relying on the fact that technically, arrays are objects with integer keys. Normally we
@@ -216,8 +216,12 @@ function stringifyValue(
       return '[Document]';
     }
 
-    if (isVueViewModel(value)) {
-      return getVueInternalName(value);
+    if (
+      typeof value === 'object' &&
+      value !== null &&
+      ('__isVue' in value || '_isVue' in value || '__v_isVNode' in value)
+    ) {
+      return '__v_isVNode' in value && value.__v_isVNode ? '[VueVNode]' : '[VueViewModel]';
     }
 
     // React's SyntheticEvent thingy

packages/core/src/utils/string.ts

@@ -1,5 +1,4 @@
-import { isRegExp, isString, isVueViewModel } from './is';
-import { getVueInternalName } from './stacktrace';
+import { isRegExp, isString } from './is';
 
 export { escapeStringForRegex } from '../vendor/escapeStringForRegex';
 
@@ -76,13 +75,14 @@ export function safeJoin(input: unknown[], delimiter?: string): string {
   for (let i = 0; i < input.length; i++) {
     const value = input[i];
     try {
-      // This is a hack to fix a Vue3-specific bug that causes an infinite loop of
-      // console warnings. This happens when a Vue template is rendered with
-      // an undeclared variable, which we try to stringify, ultimately causing
-      // Vue to issue another warning which repeats indefinitely.
+      // Vue3 ViewModels and VNodes can cause infinite console warning loops when stringified
       // see: https://github.com/getsentry/sentry-javascript/pull/8981
-      if (isVueViewModel(value)) {
-        output.push(getVueInternalName(value));
+      if (
+        typeof value === 'object' &&
+        value !== null &&
+        ('__isVue' in value || '_isVue' in value || '__v_isVNode' in value)
+      ) {
+        output.push('__v_isVNode' in value && value.__v_isVNode ? '[VueVNode]' : '[VueViewModel]');
       } else {
         output.push(String(value));
       }