Which method can a developer use to ensure cross-browser compatibility?

Testing the website across multiple browsers is essential for ensuring cross-browser compatibility. Different web browsers can render the same HTML, CSS, and JavaScript code differently due to variations in how they interpret web standards. By conducting tests in various browsers, developers can identify inconsistencies and make necessary adjustments to the code. This process helps ensure that all users, regardless of the browser they prefer, have a similar experience on the website.

Other methods, such as limiting development to only the latest browsers, do not address the wide range of users with different preferences. Avoiding JavaScript entirely can reduce functionality and interactivity, but it does not guarantee compatibility across browsers. Additionally, restricting access to a single browser alienates a portion of users who may utilize different browsers, preventing them from accessing the website. Testing across multiple platforms remains the most effective strategy for achieving cross-browser compatibility.