can you explain it a bit more with example

In project module, while changing the stages of task i want to reload the kanban view page.

@api.onchange('stage_id')

def reload_page(self):

# codes

return {

'type': 'ir.actions.client',

'tag': 'reload',

}

When i call this function on a button click it works. But i need to reload the page automatically when the stage is changed