WebAssembly example not work on browser on phone

[lucklove]

What version of Go are you using (go version)?

$ go version
go version go1.12.5 darwin/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/joshua/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/joshua/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/pb/ssv6rnq92pn_l3c9gr9rd1g80000gn/T/go-build378228854=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

As this page shows, but change the code to:

package main

import "fmt"
import "syscall/js"

func main() {
	fmt.Println("Hello, WebAssembly!")
	js.Global().Get("document").Call("write", "Hello, WebAssembly!")
}

What did you expect to see?

"Hello, WebAssembly!"

What did you see instead?

nothing

[lucklove]

Maybe related: #27462

[smasher164]

I am unable to reproduce this behavior.
Are you sure you are using the appropriate wasm_exec.js with

$ cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" .

[lucklove]

@smasher164 yes, I did copy correct wasm_exec.js.
My code works on PC, but does not work phone. Do you open it in your phone?

[agnivade]

Please use 1.13.4 and let us know if you still see issues.

[lucklove]

@agnivade not work still

[agnivade]

Would you be able to provide the console logs from the phone ? That would be very helpful in debugging this.

[smasher164]

Could you also list your phone's OS/Browser version? For instance, I tested on iPhone X, iOS 13.1.13, Chrome 77.0.3865.103. Thanks

[lucklove]

Sorry, @agnivade , @smasher164 , my mistake, it's not chrome, it's my phone's builtin browser. This error is from safari on iPhone(my friends's phone):

[lucklove]

The chrome works correctly

[agnivade]

The index.html file that you are using is incorrect. Please use the file from "$(go env GOROOT)/misc/wasm/wasm_exec.html"

EDIT: Also note this line from the wiki:

If your browser doesn’t yet support WebAssembly.instantiateStreaming, you can use a polyfill.

[lucklove]

@agnivade get it! thank you!