parse5
nearley


parse5 | nearley | |
---|---|---|
4 | 3 | |
3,726 | 3,654 | |
1.0% | 0.3% | |
9.4 | 2.5 | |
1 day ago | 3 months ago | |
TypeScript | JavaScript | |
MIT License | MIT License |
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.
parse5
- error of installing icon library
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casperjs, phantomjs, what is not going to be abandonware?
A relatively stable option would probably be to just use puppeteer directly to spawn a headless chrome, and extract the html that way. If you want to parse the html, I recommend feeding that into parse5.
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Getting Started with Deno
After some googling, I landed on parse5 which appeared to have wide usage and offered a simple, low-level tree API at its core.
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How does session replay work Part1: Serialization
We do not use existing open-source solutions such as parse5 for two reasons:
nearley
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Writing a C compiler in 500 lines of Python
While I suspect I would learn more writing a tokenizer and parsing logic myself I find grammars much easier to read and maintain.
ANTLR is pretty good and is supported across several languages and something I had previously used for some quick Elasticsearch query syntax munging in Python. It also means you can often start from an already existing grammar.
The JS version of ANTLR didn't seem to work for me so for the SQL/JSONPath stuff ended up using the Moo lever and Nearly parser which was rather pleasant. https://nearley.js.org
- Parser generators vs. handwritten parsers: surveying major languages in 2021
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Applicative Parsing
Parsers in nearley.js [1] are written in a very readable EBNF-like DSL; then they get desugared down to a JS file that's a lot like your snippet.
[1] https://github.com/kach/nearley
What are some alternatives?
JSONStream
PEG.js - PEG.js: Parser generator for JavaScript
xml2js - XML to JavaScript object converter.
Jison - Bison in JavaScript.
json-query - Retrieves values from JSON objects for data binding
markdown-it - Markdown parser, done right. 100% CommonMark support, extensions, syntax plugins & high speed
Chevrotain - Parser Building Toolkit for JavaScript
URI.js - Javascript URL mutation library
safe-json-value - ⛑️ JSON serialization should never fail
neat-csv - Fast CSV parser

