The import that worked for months and broke on my first deploy

A project developer experienced a perplexing issue when deploying their code to Vercel. The problem arose from an inconsistency in how different operating systems handle file names. During local development, the case-insensitive nature of Windows allowed the import of a CSS file to work seamlessly. However, upon deploying to Vercel, which utilizes a case-sensitive Linux environment, the import failed.

The developer discovered that the Windows filesystem resolved both "Randomfacts.css" and "randomfacts.css" to the same file, leading to a mismatched import that went unnoticed for months.

The source material highlights the importance of considering operating system differences when deploying code. A key takeaway is to use Git's "git ls-files" command rather than the regular "ls" command to check the actual file names recorded by Git. This ensures that any casing mismatches are caught before deployment, preventing potential build failures.

The author emphasizes the significance of deploying early, even when the project is not yet complete. By deploying at the start of a development process, developers can catch issues that arise due to differences between their local development environment and the deploy environment. These issues, such as case sensitivity, path separators, and missing environment variables, can be easily overlooked while working locally.

Deploying early allows developers to identify and resolve these bugs promptly, saving time and effort in the long run.

In summary, the story underscores the need to be aware of operating system discrepancies when deploying code and to deploy early in the development process to catch and resolve such issues before they impact the deployed application.