Initial syscall/js support was implemented in #53. I know everything doesn't work yet, but I did expect this simple demo to work without problems:
// +build js,wasm
package main
import "syscall/js"
var document js.Value
func init() {
document = js.Global().Get("document")
}
func main() {
div := document.Call("getElementById", "target")
node := document.Call("createElement", "div")
node.Set("innerText", "Hello World")
div.Call("appendChild", node)
}This, when compiled and executed in the browser prints the following to the console:
Firefox 67.0b11:
panic: (21:0x00010618) wasm_exec.js:199:18
RuntimeError: unreachable executed test.wasm:457:1
Chromium 73.0.3683.103
panic: (21:0x00010618)
wasm-a2b042a6-7:9 Uncaught (in promise) RuntimeError: unreachable
at runtime._panic (wasm-function[7]:31)
at (syscall/js.Value).Call (wasm-function[16]:301)
at cwa_main (wasm-function[15]:297)
at global.Go.run (http://localhost:8080/wasm_exec.js:347:24)
at run (http://localhost:8080/:41:13)
at HTMLButtonElement.onclick (http://localhost:8080/:46:51)
runtime._panic @ wasm-a2b042a6-7:9
(syscall/js.Value).Call @ wasm-a2b042a6-16:127
cwa_main @ wasm-a2b042a6-15:101
run @ wasm_exec.js:347
run @ (index):41
onclick @ (index):46
async function (async)
run @ (index):41
onclick @ (index):46
The example works as expected when compiled with gc. This was tested with tinygo 0.5.0.
This can be reproduced by cloning my wasm-experiments repo and running make tinygo target=js.
Initial
syscall/jssupport was implemented in #53. I know everything doesn't work yet, but I did expect this simple demo to work without problems:This, when compiled and executed in the browser prints the following to the console:
Firefox 67.0b11:
Chromium 73.0.3683.103
The example works as expected when compiled with
gc. This was tested withtinygo0.5.0.This can be reproduced by cloning my wasm-experiments repo and running
make tinygo target=js.