How can you set the date without Angular?

I'm writing a Greasemonkey userscript. I need to set the date of the ngx-daterangepicker-material component and have it be updated. Changing the value property of the element changes the input text but doesn't update the datepicker or apply its changes. Triggering a click or submit on the input or Apply button doesn't work. 

The component should honor these standardized events.