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Service workers to the rescue!
While prototyping a frontend application I came across an amazing project that I wanted to share. It’s called service-mocker and what it does is - by applying some neat request hooking magic, allows you to write a backend prototype of your server in a ExpressJS-like syntax, right inside your frontend application. What is even neater - they are employing service workers (obviously working only on modern browsers) which allows you to see the requests to your fake/mock backend inside the Network request panel!