diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ce2968073e0..d5bc0f5737b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -226,6 +226,9 @@ jobs:
           cache-node-modules: true
           cache-install-state: true
 
+      - name: Test React SDK
+        run: yarn g:nx test @builder.io/react -- packages/react/src
+
       - name: Run E2E tests
         run: yarn g:nx test @e2e/${{ matrix.e2e-server }}
 
diff --git a/packages/react/src/functions/should-force-browser-runtime-in-node.test.ts b/packages/react/src/functions/should-force-browser-runtime-in-node.test.ts
new file mode 100644
index 00000000000..c1ec6510196
--- /dev/null
+++ b/packages/react/src/functions/should-force-browser-runtime-in-node.test.ts
@@ -0,0 +1,67 @@
+import { shouldForceBrowserRuntimeInNode } from './should-force-browser-runtime-in-node';
+
+describe('shouldForceBrowserRuntimeInNode', () => {
+  const originalArch = process.arch;
+  const originalVersion = process.version;
+  const originalNodeOptions = process.env.NODE_OPTIONS;
+  const originalConsoleLog = console.log;
+
+  beforeEach(() => {
+    // Mock console.log to prevent actual logging during tests
+    console.log = jest.fn();
+  });
+
+  afterEach(() => {
+    // Restore original process properties
+    Object.defineProperty(process, 'arch', { value: originalArch });
+    Object.defineProperty(process, 'version', { value: originalVersion });
+    process.env.NODE_OPTIONS = originalNodeOptions;
+    console.log = originalConsoleLog;
+  });
+
+  it('should return false when not in Node runtime', () => {
+    // Save original process
+    const originalProcess = global.process;
+
+    try {
+      // Mock not being in Node runtime
+      // @ts-ignore - Intentionally modifying global.process for test
+      global.process = undefined;
+
+      expect(shouldForceBrowserRuntimeInNode()).toBe(false);
+    } finally {
+      // Restore original process
+      global.process = originalProcess;
+    }
+  });
+
+  it('should return false when not on arm64 architecture', () => {
+    Object.defineProperty(process, 'arch', { value: 'x64' });
+    Object.defineProperty(process, 'version', { value: 'v20.0.0' });
+    expect(shouldForceBrowserRuntimeInNode()).toBe(false);
+  });
+
+  it('should return false when not on Node 20', () => {
+    Object.defineProperty(process, 'arch', { value: 'arm64' });
+    Object.defineProperty(process, 'version', { value: 'v18.0.0' });
+    expect(shouldForceBrowserRuntimeInNode()).toBe(false);
+  });
+
+  it('should return false when on arm64 and Node 20 but has no-node-snapshot option', () => {
+    Object.defineProperty(process, 'arch', { value: 'arm64' });
+    Object.defineProperty(process, 'version', { value: 'v20.0.0' });
+    process.env.NODE_OPTIONS = '--no-node-snapshot';
+    expect(shouldForceBrowserRuntimeInNode()).toBe(false);
+  });
+
+  it('should return true and log warning when on arm64, Node 20, and no snapshot option flag', () => {
+    Object.defineProperty(process, 'arch', { value: 'arm64' });
+    Object.defineProperty(process, 'version', { value: 'v20.0.0' });
+    process.env.NODE_OPTIONS = '';
+
+    const result = shouldForceBrowserRuntimeInNode();
+
+    expect(result).toBe(true);
+    expect(console.log).toHaveBeenCalled();
+  });
+});
diff --git a/packages/react/src/functions/string-to-function.test.ts b/packages/react/src/functions/string-to-function.test.ts
new file mode 100644
index 00000000000..a3427bc5eb0
--- /dev/null
+++ b/packages/react/src/functions/string-to-function.test.ts
@@ -0,0 +1,335 @@
+import { Builder } from '@builder.io/sdk';
+import { stringToFunction, makeFn, getIsolateContext } from './string-to-function';
+import * as shouldForceModule from './should-force-browser-runtime-in-node';
+import { builder } from '@builder.io/sdk';
+
+jest.mock('./is-debug', () => ({
+  isDebug: jest.fn().mockReturnValue(true),
+}));
+
+// Mock for isolated-vm module
+interface MockReference {
+  value: any;
+  copySync?: () => any;
+}
+
+const mockEvalClosureSync = jest.fn().mockReturnValue('"test"');
+
+jest.mock('./safe-dynamic-require', () => ({
+  safeDynamicRequire: jest.fn().mockImplementation(() => ({
+    Isolate: class {
+      constructor() {}
+      createContextSync() {
+        return {
+          global: {
+            setSync: jest.fn(),
+            derefInto: jest.fn(),
+          },
+          evalClosureSync: mockEvalClosureSync,
+        };
+      }
+    },
+    Reference: class implements MockReference {
+      value: any;
+      constructor(val: any) {
+        this.value = val;
+      }
+    },
+  })),
+}));
+
+describe('makeFn', () => {
+  it('should create a function string with default arguments', () => {
+    const result = makeFn('state.value', true);
+    expect(result).toContain('var state = refToProxy($0);');
+    expect(result).toContain('var event = refToProxy($1);');
+    expect(result).toContain('var block = refToProxy($2);');
+    expect(result).toContain('var builder = refToProxy($3);');
+    expect(result).toContain('var Device = refToProxy($4);');
+    expect(result).toContain('var update = refToProxy($5);');
+    expect(result).toContain('var Builder = refToProxy($6);');
+    expect(result).toContain('var context = refToProxy($7);');
+    expect(result).toContain('var ctx = context;');
+    expect(result).toContain('return (state.value);');
+  });
+
+  it('should create a function string with custom arguments', () => {
+    const result = makeFn('custom.value', true, ['custom']);
+    expect(result).toContain('var custom = refToProxy($0);');
+    expect(result).not.toContain('var state = refToProxy($0);');
+    expect(result).toContain('return (custom.value);');
+  });
+
+  it('should handle non-return expressions', () => {
+    const result = makeFn('state.value', false);
+    expect(result).toContain('state.value');
+    expect(result).not.toContain('return (state.value);');
+  });
+
+  it('should include refToProxy function definition', () => {
+    const result = makeFn('state.value', true);
+    expect(result).toContain('var refToProxy = (obj) => {');
+    expect(result).toContain("if (typeof obj !== 'object' || obj === null) {");
+    expect(result).toContain('return obj;');
+    expect(result).toContain('return new Proxy({}, {');
+  });
+
+  it('should include stringify function definition', () => {
+    const result = makeFn('state.value', true);
+    expect(result).toContain('var stringify = (val) => {');
+    expect(result).toContain("if (typeof val === 'object' && val !== null) {");
+    expect(result).toContain('return JSON.stringify(val.copySync ? val.copySync() : val);');
+  });
+
+  it('should handle context alias correctly', () => {
+    const result = makeFn('ctx.value', true, ['state', 'context']);
+    expect(result).toContain('var ctx = context;');
+  });
+
+  it('should not include context alias when context is not in arguments', () => {
+    const result = makeFn('state.value', true, ['state']);
+    expect(result).not.toContain('var ctx = context;');
+  });
+
+  it('should properly wrap the code in endResult function', () => {
+    const result = makeFn('state.value', true);
+    expect(result).toContain('var endResult = function() {');
+    expect(result).toContain('return stringify(endResult());');
+  });
+});
+
+describe('getIsolateContext', () => {
+  beforeEach(() => {
+    Builder.serverContext = undefined;
+  });
+
+  it('should create a new context if none exists', () => {
+    const context = getIsolateContext();
+    expect(context).toBeDefined();
+    expect(Builder.serverContext).toBe(context);
+  });
+
+  it('should reuse existing context', () => {
+    const firstContext = getIsolateContext();
+    const secondContext = getIsolateContext();
+    expect(secondContext).toBe(firstContext);
+  });
+});
+
+describe('stringToFunction', () => {
+  beforeEach(() => {
+    // Reset Builder.isBrowser before each test
+    (Builder as any).isBrowser = true;
+    jest.clearAllMocks();
+  });
+
+  it('should return undefined for empty string', () => {
+    const fn = stringToFunction('');
+    expect(fn({})).toBeUndefined();
+  });
+
+  it('should handle basic expressions', () => {
+    const fn = stringToFunction('state.value + 1');
+    expect(fn({ value: 1 })).toBe(2);
+  });
+
+  it('should handle statements', () => {
+    const fn = stringToFunction('let x = state.value; return x + 1;');
+    expect(fn({ value: 1 })).toBe(2);
+  });
+
+  it('should handle return statements', () => {
+    const fn = stringToFunction('return state.value + 1;');
+    expect(fn({ value: 1 })).toBe(2);
+  });
+
+  it('should handle functions that start with builder.run', () => {
+    const mockBuilderObj = {
+      getUserAttributes: jest.fn(),
+      run: jest.fn().mockReturnValue('ran'),
+    } as unknown as Builder;
+    const fn = stringToFunction('builder.run()');
+    expect(fn({}, undefined, undefined, mockBuilderObj)).toBe('ran');
+  });
+
+  it('should handle event parameter', () => {
+    const fn = stringToFunction('event.target.value');
+    const mockEvent = { target: { value: 'test' } } as unknown as Event;
+    expect(fn({}, mockEvent)).toBe('test');
+  });
+
+  it('should handle builder parameter', () => {
+    const fn = stringToFunction('builder.getUserAttributes()');
+    const mockBuilder = { getUserAttributes: () => ({ name: 'test' }) } as unknown as Builder;
+    expect(fn({}, undefined, undefined, mockBuilder)).toEqual({ name: 'test' });
+  });
+
+  it('should handle context parameter', () => {
+    const fn = stringToFunction('ctx.value');
+    expect(
+      fn({}, undefined, undefined, undefined, undefined, undefined, undefined, { value: 'test' })
+    ).toBe('test');
+  });
+
+  it('should cache function results', () => {
+    const str = 'state.value + 1';
+    const fn1 = stringToFunction(str);
+    const fn2 = stringToFunction(str);
+    expect(fn1).toBe(fn2);
+  });
+
+  it('should handle errors gracefully', () => {
+    const errors: Error[] = [];
+    const fn = stringToFunction('invalid code', true, errors);
+    fn({});
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should push error messages to logs array', () => {
+    const logs: string[] = [];
+    const errors: Error[] = [];
+    // Creating a runtime error by accessing an undefined property
+    const fn = stringToFunction('state.undefinedProp.accessSomething', true, errors, logs);
+    fn({});
+    expect(logs.length).toBeGreaterThan(0);
+  });
+
+  it('should handle compilation errors', () => {
+    const errors: Error[] = [];
+    // Invalid JavaScript that will cause a compilation error
+    const fn = stringToFunction('for() {}', true, errors);
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should handle functions in contentData', () => {
+    const fn = stringToFunction('state.contentData.exampleFunction()');
+    expect(
+      fn({
+        contentData: {
+          someString: 'test',
+          exampleFunction: () => 'exampleFunctionInvoked',
+        },
+      })
+    ).toBe('exampleFunctionInvoked');
+  });
+
+  it('should pass all parameters correctly to the function', () => {
+    const fn = stringToFunction(
+      'state.value + (event ? 1 : 0) + (block ? 1 : 0) + (builder ? 1 : 0) + (Device ? 1 : 0) + (update ? 1 : 0) + (Builder ? 1 : 0) + (context ? 1 : 0)'
+    );
+
+    const mockUpdate = jest.fn();
+    const mockDevice = { isMobile: true };
+    const mockBlock = { id: 'test-block' };
+    const mockEvent = { type: 'click' } as unknown as Event;
+    const mockContext = { foo: 'bar' };
+
+    const result = fn(
+      { value: 1 },
+      mockEvent,
+      mockBlock,
+      {} as Builder,
+      mockDevice,
+      mockUpdate,
+      Builder,
+      mockContext
+    );
+
+    // All parameters present = 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 = 8
+    expect(result).toBe(8);
+  });
+
+  it('should handle the getIsolateContext with existing context', () => {
+    // Setup a fake serverContext
+    const mockContext = {
+      global: {
+        setSync: jest.fn(),
+        derefInto: jest.fn(),
+      },
+    };
+
+    Builder.serverContext = mockContext as any;
+
+    // Get the context
+    const context = getIsolateContext();
+
+    // Should return the existing context
+    expect(context).toBe(mockContext);
+
+    // Reset the context
+    Builder.serverContext = undefined;
+  });
+
+  it('should handle complex isolated VM execution', () => {
+    // Setup a customized mock for evalClosureSync
+    mockEvalClosureSync.mockImplementationOnce((code, args) => {
+      // Verify that makeFn was called with correct parameters
+      expect(code).toContain('refToProxy');
+      expect(args.length).toBeGreaterThan(0);
+
+      // Return a valid JSON string to test the JSON.parse path
+      return '{"value":"test"}';
+    });
+
+    const fn = stringToFunction('state');
+    const result = fn({ value: 'test' });
+
+    expect(result).toEqual({ value: 'test' });
+  });
+
+  describe('server-side execution', () => {
+    beforeEach(() => {
+      (Builder as any).isBrowser = false;
+      jest.spyOn(shouldForceModule, 'shouldForceBrowserRuntimeInNode').mockReturnValue(false);
+      mockEvalClosureSync.mockReset();
+      mockEvalClosureSync.mockReturnValue('"test"');
+    });
+
+    afterEach(() => {
+      jest.restoreAllMocks();
+    });
+
+    it('should use isolated VM when not in browser', () => {
+      const fn = stringToFunction('state.value');
+      expect(fn({ value: 'test' })).toBe('test');
+    });
+
+    it('should handle JSON parse errors in server context', () => {
+      mockEvalClosureSync.mockReturnValue('not valid json');
+      const fn = stringToFunction('state.value');
+      expect(fn({ value: 'test' })).toBe('not valid json');
+    });
+
+    it('should handle error in server-side execution', () => {
+      // Mock the evalClosureSync to throw an error
+      const testError = new Error('Server error');
+      mockEvalClosureSync.mockImplementation(() => {
+        throw testError;
+      });
+
+      const consoleSpy = jest.spyOn(console, 'debug').mockImplementation(() => {});
+      const errors: Error[] = [];
+
+      const fn = stringToFunction('state.value', true, errors);
+      const result = fn({ value: 'test' });
+
+      expect(result).toBeNull();
+      expect(errors).toContain(testError);
+      expect(consoleSpy).toHaveBeenCalled();
+
+      consoleSpy.mockReset();
+    });
+
+    it('should use browser runtime when shouldForceBrowserRuntimeInNode returns true', () => {
+      // Instead of testing the warn functionality which is hard to mock properly,
+      // let's verify the code path by checking that the browser runtime path works
+      // when shouldForceBrowserRuntimeInNode returns true
+      jest.spyOn(shouldForceModule, 'shouldForceBrowserRuntimeInNode').mockReturnValue(true);
+      (Builder as any).isBrowser = false; // Ensure we're in "server" mode
+
+      // Simple expression that will work in browser mode
+      const fn = stringToFunction('state.value + 1');
+      expect(fn({ value: 1 })).toBe(2);
+    });
+  });
+});
diff --git a/packages/react/src/functions/string-to-function.ts b/packages/react/src/functions/string-to-function.ts
index 28b13430e0c..47874dfb91c 100644
--- a/packages/react/src/functions/string-to-function.ts
+++ b/packages/react/src/functions/string-to-function.ts
@@ -169,6 +169,9 @@ export function stringToFunction(
       if (errors) {
         errors.push(error);
       }
+      if (logs && error.message && typeof error.message === 'string') {
+        logs.push(error.message);
+      }
       return null;
     }
   };
@@ -209,7 +212,12 @@ export const makeFn = (code: string, useReturn: boolean, args?: string[]) => {
             }
             const val = obj.getSync(key);
             if (typeof val?.copySync === 'function') {
+              try {
                 return JSON.parse(stringify(val));
+              } catch (e) {
+                log('Error:', e);
+                return refToProxy(val);
+              }
             }
             return val;
         },