libjs-test262
lightningcss
libjs-test262 | lightningcss | |
---|---|---|
4 | 11 | |
28 | 5,949 | |
- | 1.7% | |
1.9 | 8.7 | |
10 months ago | 12 days ago | |
Python | Rust | |
MIT License | Mozilla Public License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
libjs-test262
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We're building a browser when it's supposed to be impossible
Linus Groh of LibJS is an Invited Expert in TC39: https://linus.dev/posts/road-to-working-on-serenityos-and-la...
ECMAScript conformance test results looking good, 87-88% passing at the moment: https://libjs.dev/test262/
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Ladybird Web Browser – SerenityOS LibWeb Engine with a Qt GUI
this is a qt frontend (definitely works on linux) for the serenityos browser engine, libweb.
this is a new, from-scratch implementation of both a modern html/css layout engine and a javascript runtime.
see https://libjs.dev/test262/ for ecmascript conformance tests.
the browser engine is far from finished but is able to display moderately complex pages like github.
it's always exciting to see a completely new web engine running in conventional environments like linux!
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Show HN: We launched a new web browser
> Our JavaScript engine is decently mature, test262 score tracked here: https://libjs.dev/test262/
In a few years when they have achieved feature parity with Chromium or at least Safari we can discuss this again, but for now it's not ready for real life use.
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LibJS JavaScript Engine
See https://github.com/linusg/libjs-test262 for an example, specifically the CMake files and `src/main.cpp`.
The separate website is just to have a nice & short link to the test262 graph and whatever else we'll put there eventually; and also because it's built/deployed in a slightly different way than the main serenityos.org website.
lightningcss
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I'm fed up with it, so I'm writing a browser
Would you consider using some libraries in your project? There are lots of good ones in the Rust ecosystem, and many of them are not part of any existing browsers.
For example:
- https://github.com/servo/html5ever (HTML parsing - note: this is used in Servo)
- https://github.com/parcel-bundler/lightningcss (CSS parsing)
- https://github.com/DioxusLabs/taffy (web layout)
- https://github.com/pop-os/cosmic-text (text layout and rendering)
Obviously you should be free to work on whatever you like, but just as a benchmark on the scope of your project: I spent ~6 months implementing just the CSS Grid algorithm in Taffy last year. An entire browser from literal scratch is probably a 10 year project for one person.
- LightningCSS Benchmark
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We're building a browser when it's supposed to be impossible
Libraries for a lot of this stuff exist (albeit in many cases not very mature yet):
- https://github.com/pop-os/cosmic-text does text layout (which Taffy explicitly considers out of scope)
- https://github.com/AccessKit/accesskit does accessibility
- https://github.com/servo/rust-cssparser does value-agnostic CSS parsing (it will parse the general syntax but leaves value parsing up to the user, meaning you can easily add support for whatever properties you what). Libraries like https://github.com/parcel-bundler/lightningcss implement parsing for the standard css properties.
- There are crates like https://github.com/BurntSushi/bstr and https://docs.rs/wtf8/latest/wtf8/ for working with non-unicode text
We are planning to add a C API to Taffy, but tbh I feel like C is not very good for this kind of modularised approach. You really want to be able to expose complex APIs with enforced type safety and this isn't possible with C.
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Help with "returns a value referencing data owned by the current function"
Background: I encountered this problem using lightningcss.
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On Using Rust in Parcel and Vitest
You can do it - that's actually exactly what my project is doing. I have a single repository with a Rust project, that builds the .wasm file (+ .d.ts + .js) using wasm-pack, and a Node.js project, that uses this .wasm file. There's no problem in packing that and exposing as a npm package. See parcel-bundler/lightningcss for a full blown example (it's not using wasm-pack but builds the Rust project directly).
- An fast CSS parser, transformer, bundler, and minifier written in Rust
- Parcel-Css - A CSS parser, transformer, and minifier written in Rust.
- ParcelCSS – A CSS parser, transformer, and minifier written in Rust
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Parcel CSS: A new CSS parser, compiler, and minifier
Initial commit, 9 Oct 2021. That is pretty new.
What are some alternatives?
rust-cssparser - Rust implementation of CSS Syntax Level 3
PostCSS - Transforming styles with JS plugins
vimium - The hacker's browser.
swc - Rust-based platform for the Web
beacon - Beacon browser for desktop
tersenet - A new type of JavaScript-free light-weight fast browser built on rst and web assembly. Does not actually exist.
parse5 - HTML parsing/serialization toolset for Node.js. WHATWG HTML Living Standard (aka HTML5)-compliant.
serenity - The Serenity Operating System 🐞
x-ray - The next web scraper. See through the <html> noise.
wpt - Test suites for Web platform specs — including WHATWG, W3C, and others
excel-stream