cypress not working for mouseup and mousedown

[NikhilaMeka]

I have an application similar to google maps I'm writing tests to validate zoom in and zoom out using mouse scroll up and down.
I have a simple trigger function with mousedown for zoom out functionality which is not working.
it('zoom out using mouse wheel', () => {
cy.wait(2000)
cy.get('body').trigger('mousedown');
cy.get('body').trigger('mousedown');
});