add WASM blazor-like thing

go/rsc/proto.go

@@ -0,0 +1,38 @@
+// Package rsc runs server components with a stateless, React/Next-style
+// request/response: the client POSTs the component name, its (opaque) signal
+// state, and any triggered event; the server restores the state, applies the
+// event, re-renders, and returns the new state + rendered tree, which the client
+// reconciles ("swaps") into the DOM. No persistent connection, no server-held
+// session — state round-trips through the client.
+//
+// This file holds the wire types (gob), shared by server and client.
+package rsc
+
+// SNode is a serialized render node. Nodes with server handlers carry an ID and
+// their event names; the client sends {name, state, ID, event} back so the
+// server can find and invoke the handler.
+type SNode struct {
+	ID     int
+	Tag    string
+	Text   string
+	HTML   string
+	Attrs  map[string]string
+	Events []string
+	Kids   []*SNode
+}
+
+// Request is client -> server (every request is self-contained).
+type Request struct {
+	Kind   string   // "mount" | "event"
+	Name   string   // component name
+	State  [][]byte // opaque signal snapshot from the previous response
+	NodeID int      // event: node that fired
+	Event  string   // event: event name
+	Value  string   // event: target value (inputs)
+}
+
+// Response is server -> client.
+type Response struct {
+	State [][]byte
+	Tree  *SNode
+}