jelveh 9631322dc1 Tell a severed opener from a closed one by whether it can answer
The web popup flow decided which it was looking at by timing: a
`popup.closed` flip within 3s of `window.open()` was COOP severing the
opener, anything later was the user closing the window. Both halves
misfire, and both were reproduced against a real popup.

A COOP-only site whose popup navigation commits after the cutoff had its
severing read as a close, so the site was told "denied" about a second
later — while the prompt was still coming up. The Allow the user went on
to click then committed a grant the site had been told it did not get,
which is the failure the cutoff was introduced to prevent: how long a
navigation takes says nothing about whether the opener survived it.

The other way round, a signed-in site whose user dismissed the popup on
sight had that close read as severing, and fell back to polling for a
decision. A denial writes nothing to poll for, so the caller waited out
the full five-minute timeout instead of being answered.

So ask the question directly: the popup now announces itself to its
opener, which it can only do while the relationship is intact. Having
heard from it proves a later close is a real close and the answer is now;
never hearing from it means the prompt may be live in a window that
cannot answer, and the decision is read back from the server as before.
The announcement carries no token, and goes out before any sign-in gate —
a gate that delayed it would make abandoning sign-in look severed.

Measured: the popup announces itself ~290ms after opening, and a close
just after that is answered in ~1.3s rather than five minutes.
2026-07-26 13:51:29 -07:00
2026-07-16 15:52:37 -07:00
2026-07-16 15:52:37 -07:00
2024-03-02 18:39:14 -08:00
2026-05-29 13:36:10 -04:00
2026-07-07 16:13:18 -07:00
2024-03-02 18:39:14 -08:00
2026-05-14 13:01:34 -07:00
2025-02-03 14:22:01 -08:00

Puter.com, The Personal Cloud Computer: All your files, apps, and games in one place accessible from anywhere at any time.

The Open-Source Internet Computer!

« LIVE DEMO »

Puter.com · App Store · Developers · Discord · Reddit · X

screenshot


Puter

Puter is an advanced, open-source, self-hostable internet computer designed to be feature-rich, fast, and highly extensible.

For Users

Puter's goal is to provide you with every app and feature you need to work, create, and play under one roof. From a simple Notepad and Voice Recorder to Spreadsheet and Camera, Puter wants to be the all-in-one solution for your digital life.

For Developers

Puter provides everything you need to build and publish web apps and games. From AI to Cloud Storage and Database to Serverless Workers, Puter has you covered. Puter also helps you get users! Once you build your app, you can publish it on our App Store to reach and monetize users.


Getting Started

💻 Local Development

git clone https://github.com/HeyPuter/puter
cd puter
npm install
npm start

This should launch Puter at http://puter.localhost:4100


🚀 Self-Hosting

Linux/macOS

curl -fsSL https://puter.com/selfhost | sh

Windows

irm https://puter.com/selfhost?os=windows | iex

For more details, see Self-Hosting Puter.


☁️ Puter.com

Puter is available as a hosted service at puter.com.


Support

Connect with the maintainers and community through these channels:

We are always happy to help you with any questions you may have. Don't hesitate to ask!


License

This repository, including all its contents, sub-projects, modules, and components, is licensed under AGPL-3.0 unless explicitly stated otherwise. Third-party libraries included in this repository may be subject to their own licenses.


Translations

Languages
TypeScript 55.1%
JavaScript 40.4%
CSS 2.6%
HTML 1.7%