Why is cross-browser testing important?

Cross-browser testing is essential in ensuring that web applications function correctly across various browsers, devices, and assistive technologies, as each browser interprets code differently. This testing helps identify and resolve browser-specific compatibility issues, such as JavaScript, CSS, HTML validation, and DOCTYPE errors, which can affect user experience. While manual testing offers control but can be time-consuming and inconsistent, automated testing provides a faster and more reliable alternative despite higher initial costs. Effective cross-browser testing involves creating a baseline, developing a strategy, and choosing appropriate testing infrastructure, such as simulators, emulators, or real devices. Real user monitoring (RUM) and browser monitoring tools like New Relic can further enhance the testing process by providing insights into JavaScript errors, page load times, and user interactions, ensuring a seamless experience for users across different platforms.

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