Acorn vs esprima

Acorn

A small, fast, JavaScript-based JavaScript parser (by acornjs)

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esprima

ECMAScript parsing infrastructure for multipurpose analysis (by facebookarchive)

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Acorn		esprima
	Project
13	Mentions	1
10,230	Stars	139
0.8%	Growth	-
7.9	Activity	0.0
17 days ago	Latest Commit	over 5 years ago
JavaScript	Language	JavaScript
MIT License	License	BSD 2-clause "Simplified" 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.

Acorn

Posts with mentions or reviews of Acorn. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-10-21.

Abstract Syntax Trees and Practical Applications in JavaScript
13 projects | dev.to | 21 Oct 2023

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.
2 projects | /r/brdev | 15 Dec 2022
Regex for any js string for representing an object or array containing any number of array or object?
2 projects | /r/learnjavascript | 28 Nov 2022

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.
Code Art — abstract artworks for your creations
3 projects | dev.to | 25 Oct 2022

To render UI I use Svelte. To parse JS files I use Acorn JS in Web Worker.
What is Babel? And SWC?
4 projects | dev.to | 23 Oct 2022

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.
🕶 What it takes to build a Static Analysis tool
6 projects | dev.to | 17 Oct 2022

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
11 projects | news.ycombinator.com | 27 Aug 2022
[AskJS] What is your preferred tooling when working with JS ASTs?
4 projects | /r/javascript | 26 Jul 2022

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.
How do I edit an AST while parsing it?
3 projects | /r/Compilers | 16 Apr 2022

https://github.com/acornjs/acorn For parsing the tree
Show HN: Monocle – bidirectional code generation library
10 projects | news.ycombinator.com | 12 Apr 2022

esprima

Posts with mentions or reviews of esprima. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-07-29.

Implementing a runtime version of JSX
2 projects | dev.to | 29 Jul 2021

JSX is one of the most commonly used syntax extensions out there. Originally JSX was parsed via a Facebook fork of Esprima — a JavaScript syntax parser developed by jQuery. As it gained momentum, Acorn took things to their hands and decided to make their own version of the parser which ended up being 1.5–2x faster than Esprima-fb, and is now being used by officially Babel.