How to get / set the camera zoom in renderWindow

Web
4 
stlZoomInOnClick() {
        const STL_ZOOM_FACTOR = 0.2;
        const camera = this.renderer.getActiveCamera();
        camera.zoom(1 + STL_ZOOM_FACTOR); // Adjust the zoom factor as needed
        //camera.zoom(1 - STL_ZOOM_FACTOR); // For zoom out
        this.renderWindow.render();
    }