What are some common challenges faced by JavaScript web developers when working on cross-browser compatibility?

JavaScript Web Developers often encounter challenges ensuring that web applications function consistently across different browsers and their various versions. Differences in how browsers interpret JavaScript, handle CSS, or support certain APIs can lead to unexpected bugs or display issues. To overcome these challenges, developers frequently use polyfills, transpilers like Babel, and thorough testing on multiple browsers and devices. Collaborating with QA teams and staying updated on browser release notes are also important strategies to maintain compatibility and deliver a seamless user experience.