fix(build): ship built-in vue-demi to avoid resolution issues (vuejs#3680)

Author: brc-dd

lib/vue-demi.mjs

@@ -0,0 +1,34 @@
+/**
+ * vue-demi v0.14.7
+ * Copyright (c) 2020-present, Anthony Fu
+ * @license MIT
+ */
+
+import * as Vue from 'vue'
+
+var isVue2 = false
+var isVue3 = true
+var Vue2 = undefined
+
+function install() {}
+
+export function set(target, key, val) {
+  if (Array.isArray(target)) {
+    target.length = Math.max(target.length, key)
+    target.splice(key, 1, val)
+    return val
+  }
+  target[key] = val
+  return val
+}
+
+export function del(target, key) {
+  if (Array.isArray(target)) {
+    target.splice(key, 1)
+    return
+  }
+  delete target[key]
+}
+
+export * from 'vue'
+export { Vue, Vue2, isVue2, isVue3, install }

package.json

@@ -24,6 +24,9 @@
     "./theme-without-fonts": {
       "types": "./theme-without-fonts.d.ts",
       "default": "./dist/client/theme-default/without-fonts.js"
+    },
+    "./vue-demi": {
+      "default": "./lib/vue-demi.mjs"
     }
   },
   "bin": {
@@ -36,7 +39,8 @@
     "template",
     "client.d.ts",
     "theme.d.ts",
-    "theme-without-fonts.d.ts"
+    "theme-without-fonts.d.ts",
+    "lib"
   ],
   "repository": {
     "type": "git",

src/node/alias.ts

@@ -41,6 +41,10 @@ export function resolveAliases(
     {
       find: /^vitepress\/theme$/,
       replacement: join(DIST_CLIENT_PATH, '/theme-default/index.js')
+    },
+    {
+      find: /^vue-demi$/,
+      replacement: require.resolve('vitepress/vue-demi')
     }
   ]