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golang wasm. go <-> js interlop
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| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="wasm_exec.js"></script> | |
| <script> | |
| const go = new Go(); | |
| WebAssembly.instantiateStreaming(fetch("main.wasm"), go.importObject).then((result) => { | |
| go.run(result.instance); | |
| console.log(Template('123', "Цифры из этого смс никому нельзя сообщать. Для входа в приложение Рокетбанка введите код {{ index . 0 }}")); | |
| }); | |
| </script> | |
| </head> | |
| <body></body> | |
| </html> |
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| package main | |
| // import "fmt" | |
| import "syscall/js" | |
| import ( | |
| "bytes" | |
| "html/template" | |
| ) | |
| func Add(i []js.Value) { | |
| js.Global().Set("output", js.ValueOf(i[0].Int()+i[1].Int())) | |
| println(js.ValueOf(i[0].Int() + i[1].Int()).String()) | |
| } | |
| func Subtract(i []js.Value) { | |
| js.Global().Set("output", js.ValueOf(i[0].Int()-i[1].Int())) | |
| println(js.ValueOf(i[0].Int() - i[1].Int()).String()) | |
| } | |
| func registerCallbacks() { | |
| js.Global().Set("Add", js.FuncOf(func(this js.Value, args []js.Value) interface{} { | |
| Add(args) | |
| return true | |
| })) | |
| js.Global().Set("Subtract", js.FuncOf(func(this js.Value, args []js.Value) interface{} { | |
| Subtract(args) | |
| return true | |
| })) | |
| js.Global().Set("Foo", js.FuncOf(func(this js.Value, args []js.Value) interface{} { | |
| fmt.Println("HI", args) | |
| return true | |
| })) | |
| js.Global().Set("Template", js.FuncOf(func(this js.Value, args []js.Value) interface{} { | |
| return Template(args[0].String(), args[1].String()) | |
| })) | |
| } | |
| func Template(variable, templateString string) string { | |
| templ := template.New("first") | |
| templ, _ = templ.Parse(templateString) | |
| p := []string{variable} | |
| var result = new(bytes.Buffer) | |
| err := templ.Execute(result, p) | |
| if err != nil { | |
| return "" | |
| } | |
| return result.String() | |
| } | |
| func main() { | |
| c := make(chan struct{}, 0) | |
| println("WASM Go Initialized") | |
| // register functions | |
| registerCallbacks() | |
| <-c | |
| } |
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GOOS=js GOARCH=wasm go build -o main.wasm npm add -g serve serve . open http://localhost:5000/