GitHub - matthewmueller/joy: A delightful Go to Javascript compiler

Joy development is currently on hold. Recent Go -> WASM developments look like a more promising path to Go being a great choice for frontend development. I'm thrilled to see development moving so quickly now and I think our efforts are better spent improving the Go to WASM compiler. As for Joy, there are quite a few interesting nuggets of code in here that I'd encourage you to dig up, polish and open source

Thanks for your interest in this project!

Matt

Translate idiomatic Go into concise Javascript that works in every browser. Use Go's type system and world-class tooling to build large web applications with confidence.

Visit mat.tm/joy to learn more about Joy.

Getting Started     ·    Examples     ·    Using the CLI

Contributing    ·    FAQ    ·    More Links

Joy API    ·    DOM API (coming soon!)    ·    Virtual DOM API (coming soon!)

Getting Started

1. Install Joy:

curl -sfL https://raw.githubusercontent.com/matthewmueller/joy/master/install.sh | sh

Note: you can also download from the releases tab.

2. Create a main.go file with the following code:

package main

func main() {
  println("hi world!")
}

3. Run the code in a real browser:

joy run main.go

4. See the compiled Javascript:

joy main.go

Examples

Visit https://mat.tm/joy/#examples or peruse the test suite.

Using the CLI

Compile Go into Javascript:

joy <main.go>

Compile and run the Go code in headless chrome:

joy run <main.go>

Build a development version of the code:

joy build --dev <main.go>...

Build a production version of the code (coming soon!):

joy build <main.go>...

Start a development server with livereload:

joy serve <main.go>...

Run joy help for additional details.

Contributing

So happy to hear you're interested in contributing! Here's a quick rundown of how to get setup:

Setup

1. Make sure you have the Go environment setup on your computer. There are quite a few better resources online on how to do that

2. go get -u -v github.com/matthewmueller/joy/... to install the compiler from source

3. go test -v to run all the tests

Links and tips:

• https://astexplorer.net/: I've been using this to figure out how to build the JS tree
• http://goast.yuroyoro.net/ : Simple Go AST viewer
• https://github.com/estree/estree/blob/master/es5.md: Link to the ES3 AST format, this is implemented in syntax.go
• https://golang.org/ref/spec: You may need to refer to this to see what types are possible in Go's AST
• To run all tests: go test -v
• To run individual tests: go test -v -run Test/08
• pretty.Println(ast) will pretty print the JS AST (requires this package)
• ast.Print(nil, node) will pretty print the Go AST

If you have any further questions, open an issue or reach out to me on twitter.

Visit https://mat.tm/joy/#faq to view the FAQ.

More Links

• Run joy help to see what else Joy can do for you
• Visit mat.tm/joy to read more about Joy's origins
• Chat with us in #joy-compiler on Slack at gophers.slack.com
• Star github.com/matthewmueller/joy to follow the development
• Follow twitter.com/mattmueller for project updates