Which approach is commonly used to ensure cross-browser compatibility in web development?

Using standardized code and testing in multiple browsers is a widely accepted approach to ensure cross-browser compatibility in web development. This practice involves writing code that adheres to industry standards such as HTML, CSS, and JavaScript, which helps maintain consistency in how web content is rendered across different browsers. By adhering to these standards, developers can reduce inconsistencies caused by variations in how browsers interpret code.

Additionally, testing the application in multiple browsers is crucial to identify and address issues that may arise in specific environments. This proactive approach allows developers to resolve discrepancies and ensure that users enjoy a seamless experience, regardless of the browser they use. It is essential in today's diverse technological landscape, where users may access websites from a variety of devices and browsers with differing capabilities.