How to check if an element exists or not using Cypress?

Cypress is a tool used for testing websites, ensuring they function properly. It allows developers to verify if specific elements, such as buttons or links, exist on a web page. Element presence testing is crucial because different parts of a website can change based on user actions. Cypress provides several methods to check element existence, including cy.get() with should() assertion, cy.contains(), and cy.find(). Custom assertions using cy.should() enable more specific checks beyond just element existence. Conditional testing in Cypress allows for flexible tests that adapt to different scenarios. It helps ensure that elements appear or disappear as intended for various user actions, such as hover effects or responsive design changes. Testing element existence is essential for verifying user access control and ensuring successful form submissions. By leveraging Cypress's intuitive commands and powerful assertions, developers can streamline test suites and build more robust web applications.