Tio.js is a simple API wrapper around the TryItOnline API.
Requests are made asynchronously using node-fetch.
Because this is a rather simple library, there is (currently) no documentation for it.
You can look into the source code for reference, or, take a look at the examples below:
const tio = require("tio.js");
tio("js", "console.log('Hello, World!')")
.then(({ output }) => console.log(output)); // log the output into the console