Over the past few days, I decided to revamp a project of mine from April. The project has a React front end and a Ruby on Rails back end API. I rebuilt the front end, and was feeling good about the changes I’d made. Because I’m neurotic about testing, I made sure to test all the changes dozens of times locally. Everything was working beautifully.

I redeployed my app, and decided to do some quick run-throughs on the deployed version for my peace of mind. It had the opposite effect — the live version of my app barely worked at…

Christopher Leja

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