README
¶
wjsu 
wjsu (aka Webassembly Javascript Utils) is a helper package for syscall/js.
Inpsired by honnef.co/go/js/dom.
Install
GOOS=js GOARCH=wasm go get -u github.com/OneOfOne/wjsu
- note: the package requires Go 1.12 for the
syscall/jschanges.
Features
- Object.
- Array (partial).
- console (Log, Warn and Error).
- wrapper for loading external scripts.
- wrapper for js.ValueOf that doesn't panic and handles slices / maps.
Usage
x
main.go
//+build js,wasm
package main
import (
"time"
"github.com/OneOfOne/wjsu"
)
func main() {
if err := wjsu.Initialize(); err != nil {
panic(err)
}
wjsu.Console.Log("hello console", []int{1, -1}, map[string]float64{"a": 1, "z": -1})
wjsu.Document.QuerySelector("div#loader").SetInnerHTML("hello world")
app := wjsu.Document.QuerySelector("app")
for t := range time.Tick(time.Second) {
app.SetInnerHTML("time (UTC): " + t.UTC().String())
}
}
index.html
<html>
<head>
<title>WASM Loader</title>
<meta charset="utf-8">
<script>
const goInit = () => {
const go = new Go();
WebAssembly.instantiateStreaming(fetch("main.wasm"), go.importObject).then((result) => {
go.run(result.instance);
});
}
</script>
<script defer src="wasm_exec.js" onload="goInit()"></script>
</head>
<body>
<div id="loader">Loading...</div>
<app />
</body>
</html>
serve.go
//+build !js
package main
import (
"net/http"
"os/exec"
"time"
"log"
)
func main() {
time.AfterFunc(time.Second/2, func() {
exec.Command("xdg-open", "http://localhost:8080").Start()
})
log.Fatal(http.ListenAndServe(":8080", http.FileServer(http.Dir("."))))
}
build & run
cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" .
GOOS=js GOARCH=wasm go build -o main.wasm
go run serve.go
Tinygo
$ pacman -S tinygo
./tiny.sh path/to/project
VSCode settings
{
"go.toolsEnvVars": {
"GOOS": "js",
"GOARCH": "wasm"
}
}
TODO
- Proper documentation.
License
This project is released under the Apache v2. licence. See LICENCE for more details.
Documentation
¶
Source Files
Directories
Click to show internal directories.
Click to hide internal directories.