fix: Remove incorrectly timed console.warn call (#4249)

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## Description
#2665 (comment)

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src/component/ResponsiveContainer.tsx

@@ -69,12 +69,13 @@ export const ResponsiveContainer = forwardRef<HTMLDivElement | { current: HTMLDi
     const onResizeRef = useRef<Props['onResize']>();
     onResizeRef.current = onResize;
     useImperativeHandle(ref, () => {
-      return Object.assign(containerRef.current, {
-        get current() {
+      return Object.defineProperty(containerRef.current, 'current', {
+        get() {
           // eslint-disable-next-line no-console
           console.warn('The usage of ref.current.current is deprecated and will no longer be supported.');
           return containerRef.current;
         },
+        configurable: true,
       });
     });
 

test/component/ResponsiveContainer.spec.tsx

@@ -272,4 +272,25 @@ describe('<ResponsiveContainer />', () => {
 
     expect(element).toHaveStyle({ width: '100%', height: '200px', 'min-width': '200px' });
   });
+
+  it('should trigger console.warn only when accessing ref.current.current, not ref.current', () => {
+    const ref = React.createRef<any>();
+
+    const consoleWarn = vi.fn();
+    vi.spyOn(console, 'warn').mockImplementation(consoleWarn);
+
+    render(
+      <ResponsiveContainer height={100} ref={ref}>
+        <div data-testid="inside" />
+      </ResponsiveContainer>,
+    );
+
+    expect(consoleWarn).not.toHaveBeenCalled();
+    expect(ref.current instanceof HTMLElement).toBe(true);
+    expect(consoleWarn).not.toHaveBeenCalled();
+    expect(ref.current.current instanceof HTMLElement).toBe(true);
+    expect(consoleWarn).toHaveBeenLastCalledWith(
+      'The usage of ref.current.current is deprecated and will no longer be supported.',
+    );
+  });
 });