Getting the checked value of a checkbox - Material Design

It seems all I needed to do was:

cy.get('#pract-haspen').should('have.attr', 'checked')    

and that Assertion worked!

Thanks

Since none of the solutions above worked for me, I did this :

cy.get('#element').should('be.checked')

source : cypress documentation

The opposite (unchecked) assertion would be (see the official docs):

cy.get('#element').should('not.be.checked')