check if a class is contain cypress code example

Example 1: cypress have attribute

cy.get('selector')
	.should('have.attr', 'aria-checked', 'true')

Example 2: cypress element css

cy
  .get('nav')                          // yields <nav>
  .should('be.visible')                // yields <nav>
  .should('have.css', 'font-family')   // yields 'sans-serif'
  .and('match', /serif/)               // yields 'sans-serif'