Accessing a website you never visited before while being offline [demo]
This interactive demo explores how a website can load and function while you're in airplane mode — even if you've never visited it before. It requires official Google Chrome and does not work on iOS devices (iPhone/iPad). Spoiler alert: For the best experience, try the demo before reading the explanation below. You can launch it by clicking the post title at the top of this page. The demo uses SXG (Signed Exchanges), a web standard that allows Google to prefetch entire pages from search results. This means that when you click a result, the page can open even if you're offline — because…
In plain words
This interactive demo showcases how webpages can load and function offline using Google Chrome, even on first visit. It demonstrates Signed Exchanges (SXG), a web standard that allows Google to prefetch complete pages from search results before you go offline. The demo pushes the technology by delivering a page containing a 19 MB video entirely through prefetching. It works only on Chrome desktop and not on iOS devices.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
This interactive demo explores how a website can load and function while you're in airplane mode — even if you've never visited it before. It requires official Google Chrome and does not work on iOS devices (iPhone/iPad). Spoiler alert: For the best experience, try the demo before reading the explanation below. You can launch it by clicking the post title at the top of this page. The demo uses SXG (Signed Exchanges), a web standard that allows Google to prefetch entire pages from search results. This means that when you click a result, the page can open even if you're offline — because it was silently prefetched beforehand. In this demo, I push SXG to its limits by delivering a page with a 19 MB video — all before you go offline.
More life & fun this month
the category →- TL
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Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
Life & fun · 26d ago · everycube.alen.is
Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 26d ago · baselashraf81.github.io
Launched alongside, April 2025
the whole month →- IB
Hi everyone, I built PyXL — a hardware processor that executes a custom assembly generated from Python programs, without using a traditional interpreter or virtual machine. It compiles Python -> CPython Bytecode -> Instruction set designed for direct hardware execution. I’m sharing an early benchmark: a GPIO test where PyXL achieves a 480ns round-trip toggle — compared to 14-25 micro seconds on a MicroPython Pyboard - even though PyXL runs at a lower clock (100MHz vs. 168MHz). The design is stack-based, fully pipelined, and preserves Python's dynamic typing without static type restrictions.…
Dev tools · 2025 · runpyxl.com
- UC
Life & fun · 2025 · filiph.github.io
- IB
https://the-pocket.github.io/Tutorial-Codebase-Knowledge/
AI · 2025 · github.com
