goja VS otto

Compare goja vs otto and see what are their differences.

goja

ECMAScript/JavaScript engine in pure Go (by dop251)

otto

A JavaScript interpreter in Go (golang) (by robertkrimen)
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goja otto
24 9
4,845 7,763
- -
6.3 5.6
about 1 month ago 3 months ago
Go Go
MIT 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.

goja

Posts with mentions or reviews of goja. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-01-20.
  • SSR React in Go
    9 projects | dev.to | 20 Jan 2024
    dop251/goja
  • Show HN: Flyscrape – A standalone and scriptable web scraper in Go
    6 projects | news.ycombinator.com | 11 Nov 2023
    Your comment was posted 4 minutes ago. That means you still have enough time to edit your comment to change it so it contains real URLs:

    <https://github.com/PuerkitoBio/goquery>

    <https://github.com/dop251/goja>

    (Please do not reply to this comment—I won't be able to delete it once the previous post is fixed if it contains replies.)

  • TySON: TypeScript as an embeddable configuration language, without depending on Node or V8
    4 projects | /r/programming | 6 Jul 2023
    Apparently "not depending on Node or V8" means depending on some random Go JS engine instead.
  • Examples of using task scheduler with Go?
    8 projects | /r/golang | 3 Jun 2023
    Goja https://github.com/dop251/goja
  • Running a Js file inside Go
    5 projects | /r/golang | 23 Mar 2023
    Either call a JavaScript interpreter like node with exec.Command and read its stdout, or use a pure Go JavaScript interpreter like goja or otto.
  • easytemplate - Go's text/template library with JS Super Powers
    2 projects | /r/golang | 1 Mar 2023
    Just to also say this is implemented in pure Go we aren't including V8 or any external dependencies we instead use https://github.com/dop251/goja which is a JS VM written completely in Go.
  • Anyone experienced in golang ssr?
    2 projects | /r/golang | 19 Jan 2023
    Not really. It was built in-house and I don't know of anything about it that went public. I recall it using Goja for the JS runtime. Code was embedded into the binary (think embed package). There was some kind of sorcery to convert what would be HTTP network calls in the browser into local function calls during SSR, but I'm hazy on how it worked I'm afraid.
  • Plugo - A plugin library for Go.
    5 projects | /r/golang | 9 Dec 2022
    Other approaches I've seen are similar to yaegi but will embed another scripting language such as JavaScript or Lua. My personal favorite of these is goja, a JavaScript interpreter written natively in Go (no cgo dependency), it supports a lot of ES6+ modern syntax features of JavaScript. Being natively in Go, you can bind your Go functions and types and call them bidirectionally, so you can expose a surface area of internal API functions to your JS interpreter and build a scripting system for users to extend your app dynamically.
  • Run single JS func in Go app
    4 projects | /r/golang | 22 Oct 2022
    Where are your benchmarks showing github.com/dop251/goja, v8go and otto are slow? by my own testing they are sufficiently fast enough.
  • Change go code behaviour at runtime
    10 projects | /r/golang | 10 Oct 2022
    For JavaScript syntax, https://github.com/dop251/goja is the most mature and featureful. It operates between Go and the scripting engine pretty well. They still need to implement generators before moving on to async/await and proper module support, but they have a lot of other advanced es6 level features such as classes and format strings. There are soem big consumers of this--the biggest might be Grafana K6, or at least they contribute back a bit. Most of the work (like many small projects) comes from one guy that has a real job, but he's slowly yet steadily made improvements and stuck to following standards for many years now.

otto

Posts with mentions or reviews of otto. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-01-20.
  • SSR React in Go
    9 projects | dev.to | 20 Jan 2024
    robertkrimen/otto
  • Jacobin: Minimal JVM written in Go and capable of running Java 17 classes
    15 projects | news.ycombinator.com | 24 Aug 2023
    Ummm, excuse me, but where the f&$k has this been hiding? I’ve been looking for ways to extend my go applications with scripting support. I started with Lua (worked ) then Python (worked but hacky) then javascript using otto [1]. However it lacks ES6 support so having pretty OOP js code is a non-starter. I would love to have Java as a runtime that can be executed from goroutines.

    [1] https://github.com/robertkrimen/otto

  • Running a Js file inside Go
    5 projects | /r/golang | 23 Mar 2023
    Either call a JavaScript interpreter like node with exec.Command and read its stdout, or use a pure Go JavaScript interpreter like goja or otto.
  • Suggestion for a dynamic Struct Validation Rules
    5 projects | /r/golang | 21 Dec 2022
    Otto https://github.com/robertkrimen/otto Seems interesting. It lets me call Go functions from inside JS as well as return results. The fncs pattern reminds me a bit of how the template engine works.
  • Wazero: The zero dependency WebAssembly runtime for Go developers
    13 projects | news.ycombinator.com | 16 May 2022
    > why host other languages

    Here's an example:

    I recently finished building https://subzo.com.au which allows customizing and ordering 3D models. The way the model's cost, volume and other attributes are calculated needs to be done both on the frontend (for speed) and on the backend (to validate). Backend is in Go and we can't practically run Go in the browser. So instead, I wrote the calculation snippets in JavaScript (which runs natively in the browser) and ran them on the backend on a JavaScript VM library written in Go [1].

    [1]: https://github.com/robertkrimen/otto

  • Choosing scripting extension - need advice
    14 projects | /r/golang | 20 Apr 2022
    Googling suggests https://github.com/robertkrimen/otto which allows scripting in javascript for golang projects. This would be definitely enough, but in some way it may be a bit overkill - and scripts supporter shall need some knowledge of javascript which is not always straightforward :)
  • I Need to Find an Apartment
    9 projects | news.ycombinator.com | 9 Apr 2022
  • I write my own web desktop OS for 3 years and this is what it looks like now
    2 projects | dev.to | 4 Apr 2021
    It doesn't make sense to ask the user (aka me) to change the code every time I want to modify any web apps right? So I decided to split the webapps into two parts. WebApps are those only require basic permissions and do not interact with the host OS. They will be run inside a sandbox created using ECMA5 VM called Otto. The other type is called Subservice, in which it will need extra permission to interact with the OS and require higher level of access to the backend file system.

What are some alternatives?

When comparing goja and otto you can also consider the following projects:

v8go - Execute JavaScript from Go

go-duktape - [abandoned] Duktape JavaScript engine bindings for Go

gopher-lua - GopherLua: VM and compiler for Lua in Go

go-lua - A Lua VM in Go

tengo - A fast script language for Go

go-php - PHP bindings for the Go programming language (Golang)

anko - Scriptable interpreter written in golang

go-python - naive go bindings to the CPython2 C-API