With some of my newly found ‘free time’ while Funemployed, I really wanted to start playing around with some of the newer projects that I’ve simply not had the time or energy for.
I began my journey with Deno as I normally do – essentially iterating on some basic Hello World types of projects to get familiar with the dev flow, tooling and capabilities. Pretty quickly, I encountered something in my codebase that confused me – a warning notifying me that the deno window typings didn’t have everything supported by window exposed. Surprisingly, it wasn’t just me randomly plugging in code that landed me here – it was in following along with the Deno lifecycle docs that brought me to this error.
At this point in my journey, not only was I getting the warning in VSCode, but I was also unable to get beforeunload or onbeforeunload to fire… Hmm… So off to Google I go – which lead me to this thread discussing a related matter.
In digging a bit deeper, I came to realize that beforeunload/onbeforeunload weren’t firing due to my Deno version – with support for these not being added to window in Deno until v1.24.0 (and me currently running v1.23.0). “Alright”, I thought – “I just need to upgrade and this will all be solved.”
Sure enough, once on 1.24.0 I was able to play with beforeunload/onbeforeunload – but the “Element implicitly has an ‘any’ type because type ‘typeof globalThis’ has no index signature.deno-ts(7017)” warning remained…
Having wished I had more time to contribute to open source over the last several years, I saw this as an opportunity to make my wish a reality – and so I did what any developer would do, created a fork and started to work on a new branch in the hopes I could become a Deno contributor!
As most experienced devs know, stepping into a large and complex codebase isn’t always the easiest thing to do – especially if you’ve never worked with some of the core tooling. With this being my first real exposure to Rust, I was completely unfamiliar with Cargo and how to go about building and testing my changes in an efficient manner… Fortunately, after a handful of web searches, I learned the basics of working in Rust and with Cargo, how to run specific tests by name, and I was off to the races to become a real life Deno contributor.
My commit is simple enough – really just a few lines to add beforeunload and onbeforeunload to the type definition for Deno window, and some updated integration tests to ensure everything is working as expected – you can see the pull request / merge here. While a small contribution by pretty much all standards of measurement, it felt good to see an issue, fix the issue and contribute that fix back to the community – and I hope to be doing more of this in the near future.
So, what’s next? Well, I guess I can actually begin with what I set out to do – learn Deno (rather than Deno’s codebase) and start playing with Fresh! 😁