add WASM blazor-like thing

.vscode/launch.json

@@ -0,0 +1,35 @@
+{
+  // Debug configs for the gowasm example. cwd is the example dir because the
+  // dev server resolves ./wwwroot, ./app, ./wasm and the watched engine dir
+  // relative to it.
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "gowasm: dev server",
+      "type": "go",
+      "request": "launch",
+      "mode": "auto",
+      "program": "${workspaceFolder}/go/cmd/examples/go-wasm-web/server",
+      "cwd": "${workspaceFolder}/go/cmd/examples/go-wasm-web",
+      "args": ["-addr", ":8085"]
+    },
+    {
+      "name": "gowasm: dev server (no watch)",
+      "type": "go",
+      "request": "launch",
+      "mode": "auto",
+      "program": "${workspaceFolder}/go/cmd/examples/go-wasm-web/server",
+      "cwd": "${workspaceFolder}/go/cmd/examples/go-wasm-web",
+      "args": ["-watch=false"]
+    },
+    {
+      "name": "gowasm: codegen (gowasmgen)",
+      "type": "go",
+      "request": "launch",
+      "mode": "auto",
+      "program": "${workspaceFolder}/go/cmd/gowasmgen",
+      "cwd": "${workspaceFolder}/go/cmd/examples/go-wasm-web",
+      "args": ["./app"]
+    }
+  ]
+}

.vscode/tasks.json

@@ -0,0 +1,73 @@
+{
+  // Tasks for the kjol repo. The gowasm example is a nested module at
+  // go/cmd/examples/go-wasm-web, so its tasks set cwd there; the module-wide
+  // Go tasks run in go/.
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "gowasm: dev server (hot reload)",
+      "detail": "Run the go-wasm-web example: codegen + SSR + hot reload on :8085",
+      "type": "shell",
+      "command": "go run ./server",
+      "options": { "cwd": "${workspaceFolder}/go/cmd/examples/go-wasm-web" },
+      "isBackground": true,
+      "problemMatcher": {
+        "owner": "go",
+        "pattern": {
+          "regexp": "^(.*):(\\d+):(\\d+):\\s+(.*)$",
+          "file": 1, "line": 2, "column": 3, "message": 4
+        },
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": "rebuilding",
+          "endsPattern": "serving|reloading clients"
+        }
+      },
+      "presentation": { "reveal": "always", "panel": "dedicated", "clear": true },
+      "group": { "kind": "build", "isDefault": true }
+    },
+    {
+      "label": "gowasm: build (build.sh)",
+      "detail": "One-off build of the example: codegen + wasm + stage wasm_exec.js",
+      "type": "shell",
+      "command": "./build.sh",
+      "options": { "cwd": "${workspaceFolder}/go/cmd/examples/go-wasm-web" },
+      "problemMatcher": ["$go"],
+      "group": "build"
+    },
+    {
+      "label": "gowasm: codegen",
+      "detail": "Regenerate app/*.gen.go from //gowasm: directives",
+      "type": "shell",
+      "command": "go run kjol/cmd/gowasmgen ./app",
+      "options": { "cwd": "${workspaceFolder}/go/cmd/examples/go-wasm-web" },
+      "problemMatcher": ["$go"],
+      "group": "build"
+    },
+    {
+      "label": "kjol: build ./...",
+      "detail": "Build the whole kjol module (excludes the nested example)",
+      "type": "shell",
+      "command": "go build ./...",
+      "options": { "cwd": "${workspaceFolder}/go" },
+      "problemMatcher": ["$go"],
+      "group": "build"
+    },
+    {
+      "label": "kjol: vet ./...",
+      "type": "shell",
+      "command": "go vet ./...",
+      "options": { "cwd": "${workspaceFolder}/go" },
+      "problemMatcher": ["$go"],
+      "group": "test"
+    },
+    {
+      "label": "kjol: test ./...",
+      "type": "shell",
+      "command": "go test ./...",
+      "options": { "cwd": "${workspaceFolder}/go" },
+      "problemMatcher": ["$go"],
+      "group": { "kind": "test", "isDefault": true }
+    }
+  ]
+}