郑重声明,我在这里找到了一个很好的例子
Cypress examples (v9.4.1) - Form validation个
<form id="form-validation" action="/action_page.php">
<div>
<label for="item">Item:</label>
<input id="item" type="text" name="item" required />
</div>
cy.get('#item:invalid')
.invoke('prop', 'validationMessage')
.should('equal', 'Please fill out this field.')