Load extra JS scripts into flipper-ui

[nicastelo]

Adds the ability to load extra JS scripts into flipper UI.

Added a new field scripts to lib/flipper/ui/configuration.rb so it allows to load scripts into the layout of flipper-ui.

Usage:

Flipper::UI.configure do |config|
  config.scripts << { src: "https://example.com/script.js" }
end

[jnunemaker]

@nicastelo hey! Looks good. I'm curious what the use case is. I'd love to know that prior to merging.

[nicastelo]

@nicastelo hey! Looks good. I'm curious what the use case is. I'd love to know that prior to merging.

Thanks!

In my case, I wanted to load some extra content into the page, like a list of actors to select from. Apart from that, this feature could be useful for adding custom styles or have some company branding, like a logo. It can even be useful for tracking stuff on the frontend side if you wanted to.

Initially, I thought I could extend the ERB views but didn’t find an easy way to do so, apart from potentially monkey-patching and creating another set of views. With JS, I can simply load whatever content I want onto the page.