HN user
When I come across a situation like that, i consider the chunk of code reusable and split it into a separate function. It may not be perfect and you might need to make that function more generic than it was but I think it makes sense.
AWS Lambdas can run up to 15 minutes actually
x1000. You can't use hover because of mobile.
As others have said, V8 in the title is confusing.. v8.0 would be better. Also, the website at a glance was very confusing to me. I feel the top should have a section about what "Flat" is and what it solves. I should know your mission statement right away.
It looks like a very nice piece of composing software but I fear most of your visitors will close your website before figuring that out.