estree
Acorn
estree | Acorn | |
---|---|---|
8 | 13 | |
4,958 | 10,230 | |
0.5% | 0.8% | |
5.3 | 7.9 | |
6 months ago | 16 days ago | |
JavaScript | ||
GNU General Public License v3.0 or later | MIT License |
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estree
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ESLint Understand By Doing Part 1: Abstract Syntax Trees
ESLint's AST format, ESTree, would represent this line of code as:
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Eglot has landed on master: Emacs now has a built-in LSP client
That was a super interesting link, thank you.
For the ontological problem, I presume you're referring to how there are so many differing ideas of how to represent ASTs (apologies for mixing languages, these URLs were just handy):
* https://lisperator.net/uglifyjs/ast#nodes
* https://github.com/estree/estree#the-estree-spec
* ... likely others
which makes it hard for ls1 to ask ls2 about "the for-of iteration variable Node" because ls2 could be using UglifyJS or ESTree or their own(!) AST nomenclature?
And all of this is made worse by (e.g.) Java1.3 versus Java19 because languages are rarely static
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Statements vs. Expressions
I find it better to actually look at the AST for javascript.
These are expressions:
https://github.com/estree/estree/blob/master/es5.md#expressi...
These are statements:
https://github.com/estree/estree/blob/master/es5.md#statemen...
I guess the confusing part for many is how an expression can also be a statement. But if you look at the ExpressionStatement you see that an expression is not also a statement. It's just the wrapper statement!
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A technical tale of NodeSecure - Chapter 2
When I started the NodeSecure project I had almost no experience 🐤 with AST (Abstract Syntax Tree). My first time was on the SlimIO project to generate codes dynamically with the astring package (and I had also looked at the ESTree specification).
- Show HN: Monocle – bidirectional code generation library
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Go is the future of Frontend infrastructure
ESTree compatible output, AST explorer on WASM
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Introducing GraphQL-ESLint!
The parser we wrote transforms the GraphQL AST into ESTree structure, so it allows you to travel the GraphQL AST tree easily.
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Revealing the magic of AST by writing babel plugins
For espree parser(the one eslint uses) we can refer here Eslint AST Node Types
Acorn
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Abstract Syntax Trees and Practical Applications in JavaScript
Why do we then have other JavaScript parsers like babel parser, swc parser, acorn, espree and the likes since JavaScript engines have their own internal parsers?
- Árvore de sintaxe abstrata, oque são e aonde vivem.
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Regex for any js string for representing an object or array containing any number of array or object?
If you're trying to determine if a string is valid Javascript then your best bet is to use a JS parser like Acorn. Trying to DIY parsing with just regex is a good way to end up incredibly frustrated.
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Code Art — abstract artworks for your creations
To render UI I use Svelte. To parse JS files I use Acorn JS in Web Worker.
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What is Babel? And SWC?
Behind Babel is created by an Australian developer Sebastian McKenzie and now consists a small team of contributors. Babel also makes uses a polyfill library called core-js, which in turn uses a JavaScript parser, acorn.
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🕶 What it takes to build a Static Analysis tool
At line 3, we import parseScript from meriyah which is a JavaScript parser (could have been babel, acorn, swc, etc doesn't matter for our use case as long as they correctly implement the spec).
- Acorn: A lightweight PaaS for Kubernertes, from Rancher founders
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[AskJS] What is your preferred tooling when working with JS ASTs?
A simple starting point is Acorn with estree-walker. Not sure if you'll need more advanced functionality but that pair has worked well for my usage. It's also the combo that Svelte uses internally.
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How do I edit an AST while parsing it?
https://github.com/acornjs/acorn For parsing the tree
- Show HN: Monocle – bidirectional code generation library
What are some alternatives?
esprima - ECMAScript parsing infrastructure for multipurpose analysis
babel-parser
esprima - ECMAScript parsing infrastructure for multipurpose analysis
escodegen - ECMAScript code generator
cherow
kataw - An 100% spec compliant ES2022 JavaScript toolchain
Rocambole - Recursively walk and transform EcmaScript AST
babel-handbook - :blue_book: A guided handbook on how to use Babel and how to create plugins for Babel.
jscodeshift - A JavaScript codemod toolkit.
qwik - Instant-loading web apps, without effort
Babel (Formerly 6to5) - 🐠 Babel is a compiler for writing next generation JavaScript.