test262
Official ECMAScript Conformance Test Suite (by tc39)
engine262
An implementation of ECMA-262 in JavaScript (by engine262)
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test262 | engine262 | |
---|---|---|
5 | 9 | |
2,190 | 774 | |
1.9% | 1.8% | |
9.2 | 6.3 | |
10 days ago | about 2 months ago | |
JavaScript | TypeScript | |
GNU General Public License v3.0 or later | MIT License |
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.
test262
Posts with mentions or reviews of test262.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2024-02-06.
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The Ladybird Browser Project
Indeed. These may be even more important...
https://github.com/tc39/test262
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[2023-07-12] Razuberi Development Update
I successfully executed the assert-true.js and assert-false.js tests in the harness folder of the test262 repo. (This folder is full of tests which test the test harness itself.)
- The death of Mozilla is the death for open web
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Enumerating and analyzing 40 non-V8 JavaScript implementations
I have used a few js engines in the past (nashorn, rhino, otto) and all had problems with missing edge cases in the APIs or really weird quirks in the interop with the host environment.
https://github.com/tc39/test262 is the ecma test suite.
rhino for example has extensive gaps:
- I bought ISO 8601-1:2019 and 8601-2:2019. AMA
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.)
What are some alternatives?
When comparing test262 and engine262 you can also consider the following projects:
rhino - Rhino is an open-source implementation of JavaScript written entirely in Java
sval - A javascript interpreter written in javascript
wtfjs - 🤪 A list of funny and tricky JavaScript examples
txiki.js - A tiny JavaScript runtime
qtdeclarative - Qt Declarative (Quick 2)
v8go - Execute JavaScript from Go
Jint - Javascript Interpreter for .NET
JS-Interpreter - A sandboxed JavaScript interpreter in JavaScript.
String.prototype.trimStart - ES2019 spec-compliant String.prototype.trimStart shim
mjs - ECMAScript Interpreter