fix: preserve wheel delta remainder

Author: QDyanbing

src/InputNumber.tsx

@@ -607,7 +607,7 @@ const InputNumber = React.forwardRef<InputNumberRef, InputNumberProps>((props, r
       // moving mouse wheel rises wheel event with deltaY < 0
       // scroll value grows from top to bottom, as screen Y coordinate
       onInternalStep(wheelDeltaRef.current < 0, 'wheel');
-      wheelDeltaRef.current = 0;
+      wheelDeltaRef.current -= Math.sign(wheelDeltaRef.current) * WHEEL_STEP_DISTANCE;
     }
   });
 

tests/wheel.test.tsx

@@ -104,6 +104,24 @@ describe('InputNumber.Wheel', () => {
     expect(onChange).toHaveBeenCalledWith(1);
   });
 
+  it('preserves remaining wheel delta after stepping', () => {
+    const onChange = jest.fn();
+    const { container } = render(<InputNumber onChange={onChange} changeOnWheel />);
+    const input = container.querySelector('input');
+
+    fireEvent.focus(container.firstChild);
+    fireEvent.wheel(input, { deltaY: -130 });
+    expect(onChange).toHaveBeenCalledTimes(1);
+    expect(onChange).toHaveBeenLastCalledWith(1);
+
+    fireEvent.wheel(input, { deltaY: -69 });
+    expect(onChange).toHaveBeenCalledTimes(1);
+
+    fireEvent.wheel(input, { deltaY: -1 });
+    expect(onChange).toHaveBeenCalledTimes(2);
+    expect(onChange).toHaveBeenLastCalledWith(2);
+  });
+
   it('supports line mode wheel delta', () => {
     const onChange = jest.fn();
     const { container } = render(<InputNumber onChange={onChange} changeOnWheel />);