engine262
An implementation of ECMA-262 in JavaScript (by engine262)
qtdeclarative
Qt Declarative (Quick 2) (by qt)
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| engine262 | qtdeclarative | |
|---|---|---|
| 9 | 4 | |
| 776 | 195 | |
| 1.2% | 1.5% | |
| 6.3 | 9.9 | |
| about 2 months ago | 2 days ago | |
| TypeScript | C++ | |
| MIT License | GNU General Public License v3.0 or later |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
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.
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.
engine262
Posts with mentions or reviews of engine262.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-12-10.
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A list of JavaScript engines, runtimes, interpreters
engine262
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Can you make your own JavaScript by implementing ECMAScript standard?
Indeed. ECMA-262 has been implemented using JavaScript https://github.com/engine262/engine262.
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What sorts of things would you consider to be “advanced” javascript concepts?
Node.js is not the only JavaScript runtime. JavaScript runtimes have been written using JavaScript alone, see engine262. There is also Deno, QuickJS, txiki.js, Bun, none of which use COmmonJS by default, SpiderMonkey, et al.
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Ask HN: What interesting problems are you working on? ( 2022 Edition)
for an interpreted language like JS, this project is really nice https://github.com/engine262/engine262. More or less 2 parts: parser and evaluator
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Is there a source that shows how built in js methods/functions are built?
That is a bit complex, so here's a list of JS engines: if you pick one written *in* JS, that would probably be most useful -- engine262 for example
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QuickJS JavaScript Engine – Fabrice Bellard
then you might be impressed by https://github.com/engine262/engine262 as well
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And so was the C compiler.
Engine 262
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[AskJS] is there a way to quantitatively check if a number value is copied or only the pointer to that number is copied?
It's outside of what you asked for, but here's a JavaScript engine in JavaScript. Might make for some interesting bedtime reading!
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Enumerating and analyzing 40 non-V8 JavaScript implementations
Interesting to see a JS implementation written in JS:
https://github.com/engine262/engine262/
(The readme explains what the point of it is.)
qtdeclarative
Posts with mentions or reviews of qtdeclarative.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2022-09-13.
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Mtime comparison considered harmful (2018)
Current ideas to work around it require individual solutions per distribution/ISV, as this would mean they'd have to come up with domain specific criteria for cache invalidation (as the store path/derivation hash on NixOS) and to maintain a downstream patch for this solution and furthermore wouldn't work for local build processes (e.g. from within an IDE).
Lesson of the day: never use mtimes, they'll bite you in the ass sooner or later!
[1] https://github.com/NixOS/nixpkgs/issues/177720
[2] https://reproducible-builds.org/docs/timestamps/
[3] https://github.com/qt/qtdeclarative/commit/5106afcd76e377a6b...
[4] https://github.com/NixOS/nixpkgs/issues/177720#issuecomment-...
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A new wave of Linux applications
I found a qmlcompiler folder at https://github.com/qt/qtdeclarative/tree/dev/src/qmlcompiler, but I don't know if it's the compiler itself or bindings. I can't find qmlsc in GitHub qt or qtproject though.
- Delphi 11 Alexandria Has Been Released
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Enumerating and analyzing 40 non-V8 JavaScript implementations
Ok sweet I see now. They used JavaScriptCore until 2011 or so, switched to V8 until 2013, and have been using their own implementation, q4, since then. The source code seems to be here: https://github.com/qt/qtdeclarative/tree/dev/src/qml/jsrunti....
Thanks! Will add and be live shortly.
What are some alternatives?
When comparing engine262 and qtdeclarative you can also consider the following projects:
test262 - Official ECMAScript Conformance Test Suite
Gittyup - Understand your Git history!
sval - A javascript interpreter written in javascript
txiki.js - A tiny JavaScript runtime
Duilib
v8go - Execute JavaScript from Go
Qt - Qt Base (Core, Gui, Widgets, Network, ...)
JS-Interpreter - A sandboxed JavaScript interpreter in JavaScript.
ChakraCore - ChakraCore is an open source Javascript engine with a C API.
Jint - Javascript Interpreter for .NET
doublecmd - Double Commander is a free cross platform open source file manager with two panels side by side.