Instruction: Describe the methods to customize and handle errors in Next.js, including the display of custom error pages.
Context: This question delves into the candidate's ability to manage and customize error handling in Next.js, ensuring a user-friendly error experience.
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Clarifying the Question: To ensure I'm addressing the right aspect, you're asking about the customization and handling of errors in Next.js, focusing on displaying custom error pages, correct?
In my experience, effective error handling in Next.js is a two-pronged approach. First, by utilizing the built-in _error.js page and second, by strategically using getInitialProps within this page to manage server-side and client-side errors gracefully....