How do I integrate a Javascript Library into my game?

Hello,

I'm trying to make a Japanese typing game that doesn't require the user to have an IME installed. I found a lovely little Javascript library/plugin/not sure what to call it, named WanaKana that automatically converts what is typed by the user into one of the Japanese scripts. I would like to somehow integrate this into a Construct Text Input box but have no idea how to get started. Do I need to make a custom Text Input plugin? Any help on this would be really appreciated, or if you can point me towards some resources where I can learn what I need to know.

Here is the link to WanaKana's Github, scroll down and check out the "Demo Site" to see what it does.

WanaKana: https://github.com/WaniKani/WanaKana

Thanks again!

Maybe a behavior that target input elements specifically could do the trick ?

The API doesn't look that complicated, so it should be straightforward to wrap in a behavior.