add dummy support for js,wasm (#1955)

Author: pjebs

tcplisten/socket.go

@@ -1,4 +1,4 @@
-//go:build linux || darwin || dragonfly || freebsd || netbsd || openbsd || rumprun || (zos && s390x)
+//go:build !js && !wasm && (linux || darwin || dragonfly || freebsd || netbsd || openbsd || rumprun || (zos && s390x))
 
 package tcplisten
 

tcplisten/socket_other.go

@@ -1,4 +1,4 @@
-//go:build linux || dragonfly || freebsd || netbsd || openbsd || rumprun
+//go:build !js && !wasm && (linux || dragonfly || freebsd || netbsd || openbsd || rumprun)
 
 package tcplisten
 

tcplisten/tcplisten_js_wasm.go

@@ -0,0 +1,17 @@
+package tcplisten
+
+import (
+	"net"
+)
+
+// A dummy implementation for js,wasm
+type Config struct {
+	ReusePort   bool
+	DeferAccept bool
+	FastOpen    bool
+	Backlog     int
+}
+
+func (cfg *Config) NewListener(network, addr string) (net.Listener, error) {
+	return net.Listen(network, addr)
+}