escodegen vs Monocle

escodegen

ECMAScript code generator (by estools)

Source Code

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Monocle

Optics library for Scala (by optics-dev)

Extensions Scala Functional programming Optics Lens Typelevel Cats

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optics.dev

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escodegen		Monocle
	Project
3	Mentions	5
2,620	Stars	1,632
0.2%	Growth	0.1%
1.2	Activity	8.2
26 days ago	Latest Commit	9 days ago
JavaScript	Language	Scala
BSD 2-clause "Simplified" License	License	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.

escodegen

Posts with mentions or reviews of escodegen. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-05-07.

How to make your own programming language in JavaScript
6 projects | dev.to | 7 May 2022

What's cool about Esprima syntax is that there are tools that generate code based on their AST. An example is escodegen which takes Esprima AST as input and outputs JavaScript code. You can think that you can use just strings to generate code, but this solution will not scale. In this tutorial, I show only a single if statement but you will run into a lot of problems if you will have more complex code.
Show HN: Monocle – bidirectional code generation library
10 projects | news.ycombinator.com | 12 Apr 2022
Abstract Syntax Trees: They're Actually Used Everywhere -- But What Are They?
4 projects | dev.to | 17 Nov 2021

Unparse the modified AST back into Javascript: Escodegen

Monocle

Posts with mentions or reviews of Monocle. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-04-12.

Ref in cats-effect. When should I use it, and when should I not?
1 project | /r/scala | 9 Jul 2022

Without concurrency, using a Ref doesn't buy you anything over just using a var. If you want the benefits of immutability with an API that resembles mutability, you have to use something like Monocle.
Show HN: Monocle – bidirectional code generation library
10 projects | news.ycombinator.com | 12 Apr 2022

A very popular Scala optics library is also called Monocle. I’ve been a happy user for a few years:
https://github.com/optics-dev/Monocle
Monocle 3 release candidate - a super useful and simple library for optics with poetic api
1 project | /r/scala | 1 Jun 2021

See example https://www.optics.dev/Monocle/
Monocle 3.0.0-M1 is released for Scala 2.13 and Scala 3
1 project | /r/scala | 19 Feb 2021
Monocle 3 Roadmap
3 projects | /r/scala | 21 Jan 2021

We always have work to do, for example to define scalfix rules to automate the migration https://github.com/optics-dev/Monocle/issues/1001

What are some alternatives?

When comparing escodegen and Monocle you can also consider the following projects:

recast - JavaScript syntax tree transformer, nondestructive pretty-printer, and automatic source map generator

Quicklens - Modify deeply nested case class fields

esprima - ECMAScript parsing infrastructure for multipurpose analysis

Shapeless - Generic programming for Scala

espree - An Esprima-compatible JavaScript parser

Chimney - Scala library for boilerplate-free, type-safe data transformations

astring - 🌳 Tiny and fast JavaScript code generator from an ESTree-compliant AST.

cats - Lightweight, modular, and extensible library for functional programming.

estree - The ESTree Spec

Scalaz - Principled Functional Programming in Scala

estraverse - ECMAScript JS AST traversal functions

Scala Graph - Graph for Scala is intended to provide basic graph functionality seamlessly fitting into the Scala Collection Library. Like the well known members of scala.collection, Graph for Scala is an in-memory graph library aiming at editing and traversing graphs, finding cycles etc. in a user-friendly way.