[Poi] Use Poi to Build an Index.js with Modern JavaScript Features

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Poi can easily launch an index.js file simply by running the poi command. This will launch a dev-server and automatically reload whenever you make changes. You can also npm install any package you need and import it right away.

Install:

npm install -g poi

Code:

// src/index.jsimport {Observable} from 'rxjs';Observable.intervable(1000).subscribe(
i = > document.getElementById("app").innerHTML = `
<h1>{i}</h1>
`
)

Run:

poi src/index --port 3000