wip: make sfc playground work after refactor + support dev mode

package.json

@@ -4,21 +4,21 @@
   "packageManager": "pnpm@9.12.3",
   "type": "module",
   "scripts": {
-    "dev": "node scripts/dev.js vue vue-vapor",
+    "dev": "node scripts/dev.js vue runtime-vapor",
     "build": "node scripts/build.js",
     "build-dts": "tsc -p tsconfig.build.json --noCheck && rollup -c rollup.dts.config.js",
     "clean": "rimraf --glob packages/*/dist temp .eslintcache",
     "size": "run-s \"size-*\" && node scripts/usage-size.js",
-    "size-global": "node scripts/build.js vue vue-vapor runtime-dom runtime-vapor compiler-dom -f global -p --size",
+    "size-global": "node scripts/build.js vue runtime-vapor runtime-dom runtime-vapor compiler-dom -f global -p --size",
     "size-esm-runtime": "node scripts/build.js vue -f esm-bundler-runtime",
-    "size-esm": "node scripts/build.js runtime-shared runtime-dom runtime-vapor runtime-core reactivity shared vue-vapor -f esm-bundler",
+    "size-esm": "node scripts/build.js runtime-shared runtime-dom runtime-vapor runtime-core reactivity shared runtime-vapor -f esm-bundler",
     "check": "tsc --incremental --noEmit",
     "lint": "eslint --cache .",
     "format": "prettier --write --cache .",
     "format-check": "prettier --check --cache .",
     "test": "vitest",
     "test-unit": "vitest --project unit",
-    "test-e2e": "node scripts/build.js vue vue-vapor -f global -d && vitest --project e2e",
+    "test-e2e": "node scripts/build.js vue runtime-vapor -f global -d && vitest --project e2e",
     "test-dts": "run-s build-dts test-dts-only",
     "test-dts-only": "tsc -p packages-private/dts-built-test/tsconfig.json && tsc -p ./packages-private/dts-test/tsconfig.test.json",
     "test-coverage": "vitest run --project unit --coverage",
@@ -41,7 +41,7 @@
     "build-all-cjs": "node scripts/build.js vue runtime compiler reactivity shared -af cjs",
     "build-runtime-esm": "node scripts/build.js runtime reactivity shared -af esm-bundler && node scripts/build.js vue -f esm-bundler-runtime && node scripts/build.js vue -f esm-browser-runtime",
     "build-browser-esm": "node scripts/build.js runtime reactivity shared -af esm-bundler && node scripts/build.js vue -f esm-bundler && node scripts/build.js vue -f esm-browser",
-    "build-ssr-esm": "node scripts/build.js compiler-sfc server-renderer vue-vapor -f esm-browser",
+    "build-ssr-esm": "node scripts/build.js compiler-sfc server-renderer runtime-vapor -f esm-browser",
     "build-sfc-playground-self": "cd packages-private/sfc-playground && npm run build",
     "preinstall": "npx only-allow pnpm",
     "postinstall": "simple-git-hooks"

packages-private/sfc-playground/src/App.vue

@@ -57,7 +57,6 @@ const importMap = computed(() => {
       'vue/vapor': vapor,
     },
   }
-  if (useVaporMode.value) vaporImportMap.imports!.vue = vapor
 
   return mergeImportMap(vueImportMap.value, vaporImportMap)
 })

packages/runtime-vapor/src/apiDefineComponent.ts

@@ -0,0 +1,7 @@
+import type { VaporComponent } from './component'
+
+/*! #__NO_SIDE_EFFECTS__ */
+export function defineComponent(comp: VaporComponent): VaporComponent {
+  // TODO type inference
+  return comp
+}

packages/runtime-vapor/src/block.ts

@@ -10,6 +10,19 @@ export type Fragment = {
   [fragmentKey]: true
 }
 
+export function isFragment(val: NonNullable<unknown>): val is Fragment {
+  return fragmentKey in val
+}
+
+export function isBlock(val: NonNullable<unknown>): val is Block {
+  return (
+    val instanceof Node ||
+    isArray(val) ||
+    isVaporComponent(val) ||
+    isFragment(val)
+  )
+}
+
 /*! #__NO_SIDE_EFFECTS__ */
 export function normalizeBlock(block: Block): Node[] {
   const nodes: Node[] = []

packages/runtime-vapor/src/component.ts

@@ -2,6 +2,7 @@ import {
   type ComponentInternalOptions,
   type ComponentPropsOptions,
   EffectScope,
+  type EmitFn,
   type EmitsOptions,
   type GenericAppContext,
   type GenericComponentInstance,
@@ -11,8 +12,9 @@ import {
   nextUid,
   popWarningContext,
   pushWarningContext,
+  warn,
 } from '@vue/runtime-dom'
-import type { Block } from './block'
+import { type Block, isBlock } from './block'
 import { pauseTracking, resetTracking } from '@vue/reactivity'
 import { EMPTY_OBJ, isFunction } from '@vue/shared'
 import {
@@ -22,6 +24,7 @@ import {
 } from './componentProps'
 import { setDynamicProp } from './dom/prop'
 import { renderEffect } from './renderEffect'
+import { emit } from './componentEmits'
 
 export type VaporComponent = FunctionalVaporComponent | ObjectVaporComponent
 
@@ -93,11 +96,29 @@ export function createComponent(
 
   const setupFn = isFunction(component) ? component : component.setup
   const setupContext = setupFn!.length > 1 ? new SetupContext(instance) : null
-  instance.block = setupFn!(
-    instance.props,
-    // @ts-expect-error
-    setupContext,
-  ) as Block // TODO handle return object
+  const setupResult =
+    setupFn!(
+      instance.props,
+      // @ts-expect-error
+      setupContext,
+    ) || EMPTY_OBJ
+
+  if (__DEV__ && !isBlock(setupResult)) {
+    if (isFunction(component)) {
+      warn(`Functional vapor component must return a block directly.`)
+      instance.block = []
+    } else if (!component.render) {
+      warn(
+        `Vapor component setup() returned non-block value, and has no render function.`,
+      )
+      instance.block = []
+    } else {
+      instance.block = component.render.call(null, setupResult)
+    }
+  } else {
+    // in prod result can only be block
+    instance.block = setupResult as Block
+  }
 
   // single root, inherit attrs
   if (
@@ -161,6 +182,7 @@ export class VaporComponentInstance implements GenericComponentInstance {
   ec: LifecycleHook
 
   // dev only
+  setupState?: Record<string, any>
   propsOptions?: NormalizedPropsOptions
   emitsOptions?: ObjectEmitsOptions | null
 
@@ -208,13 +230,13 @@ export function isVaporComponent(
 
 export class SetupContext<E = EmitsOptions> {
   attrs: Record<string, any>
-  // emit: EmitFn<E>
+  emit: EmitFn<E>
   // slots: Readonly<StaticSlots>
   expose: (exposed?: Record<string, any>) => void
 
   constructor(instance: VaporComponentInstance) {
     this.attrs = instance.attrs
-    // this.emit = instance.emit as EmitFn<E>
+    this.emit = emit.bind(null, instance) as EmitFn<E>
     // this.slots = instance.slots
     this.expose = (exposed = {}) => {
       instance.exposed = exposed

packages/runtime-vapor/src/componentEmits.ts

@@ -1,14 +1,6 @@
-import {
-  type EmitFn,
-  type ObjectEmitsOptions,
-  baseEmit,
-} from '@vue/runtime-dom'
-import {
-  type VaporComponent,
-  type VaporComponentInstance,
-  currentInstance,
-} from './component'
-import { EMPTY_OBJ, NOOP, hasOwn, isArray } from '@vue/shared'
+import { type ObjectEmitsOptions, baseEmit } from '@vue/runtime-dom'
+import type { VaporComponent, VaporComponentInstance } from './component'
+import { EMPTY_OBJ, hasOwn, isArray } from '@vue/shared'
 import { resolveSource } from './componentProps'
 
 /**
@@ -34,15 +26,6 @@ export function normalizeEmitsOptions(
   return (comp.__emitsOptions = normalized)
 }
 
-export function useEmit(): EmitFn {
-  if (!currentInstance) {
-    // TODO warn
-    return NOOP
-  } else {
-    return emit.bind(null, currentInstance)
-  }
-}
-
 export function emit(
   instance: VaporComponentInstance,
   event: string,

packages/runtime-vapor/src/index.ts

@@ -1,7 +1,7 @@
 export { createComponent } from './component'
 export { renderEffect } from './renderEffect'
 export { createVaporApp } from './apiCreateApp'
-export { useEmit } from './componentEmits'
+export { defineComponent } from './apiDefineComponent'
 
 // DOM
 export { template, children, next } from './dom/template'