goja
otto
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goja
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SSR React in Go
dop251/goja
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Show HN: Flyscrape – A standalone and scriptable web scraper in Go
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.)
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TySON: TypeScript as an embeddable configuration language, without depending on Node or V8
Apparently "not depending on Node or V8" means depending on some random Go JS engine instead.
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Examples of using task scheduler with Go?
Goja https://github.com/dop251/goja
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Running a Js file inside Go
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.
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easytemplate - Go's text/template library with JS Super Powers
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.
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Anyone experienced in golang ssr?
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.
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Plugo - A plugin library for Go.
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.
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Run single JS func in Go app
Where are your benchmarks showing github.com/dop251/goja, v8go and otto are slow? by my own testing they are sufficiently fast enough.
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Change go code behaviour at runtime
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
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SSR React in Go
robertkrimen/otto
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Jacobin: Minimal JVM written in Go and capable of running Java 17 classes
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.
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Running a Js file inside Go
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.
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Suggestion for a dynamic Struct Validation Rules
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.
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Wazero: The zero dependency WebAssembly runtime for Go developers
> 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].
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Choosing scripting extension - need advice
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
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I write my own web desktop OS for 3 years and this is what it looks like now
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?
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