Apart from the absurdity of representing React application as a hotel, the strangest thing about this building was its windows.

“Mum! Did you see that? The window changed!” said the boy after hitting an onKeyPress button.

“Yes, Tommy, they tend to do that.” absently replied his mother while trying to read the latest news displayed on a window on the first floor.

“But, I pressed a button on this window.” the boy insisted, “How could someone on the fifth floor know about that?”

“I don’t know, Tommy. They just do.”

But, of course, it was never that easy.

Like most visitors, Tommy’s mother was so obsessed with the hotel windows, that she never bothered to go inside.

What she took for granted, was a complex and well-organized system.

And it all starts with — Monsieur Gustave.

Monsieur Gustave, the Concierge

Monsieur Gustave

The identity of the owner of the hotel was unknown.

Each month, his emissary, known as Codecs Editor, arrived to review the books and convey messages on behalf of the mysterious proprietor.

On these occasions, Monsieur Gustave met him in private consultation above reception.

After the meeting, he walked out with a bunch of papers called property documents, or simply — props.

He walked over to the room 100, took a single document and slid it under the door.

He would do that for all rooms on the first floor, before returning to his office.