Added propsData to migration guide

src/.vuepress/config.js

@@ -194,6 +194,7 @@ const sidebar = {
         '/guide/migration/key-attribute',
         '/guide/migration/keycode-modifiers',
         '/guide/migration/listeners-removed',
+        '/guide/migration/props-data',
         '/guide/migration/props-default-this',
         '/guide/migration/render-function-api',
         '/guide/migration/slots-unification',

src/guide/migration/introduction.md

@@ -113,7 +113,8 @@ The following consists a list of breaking changes from 2.x:
 - [$on, $off and $once instance methods](/guide/migration/events-api.html)
 - [Filters](/guide/migration/filters.html)
 - [Inline templates attributes](/guide/migration/inline-template-attribute.html)
-- [`$children` instance property](/guide/migration/children.md)
+- [`$children` instance property](/guide/migration/children.html)
+- [`propsData` option](/guide/migration/props-data.html)
 - `$destroy` instance method. Users should no longer manually manage the lifecycle of individual Vue components.
 
 ## Supporting Libraries

src/guide/migration/props-data.md

@@ -0,0 +1,41 @@
+---
+badges:
+  - removed
+---
+
+# `propsData` <MigrationBadges :badges="$frontmatter.badges" />
+
+## Overview
+
+The `propsData` option, used to pass props to the Vue instance during its creation, is removed. To pass props to the root component of a Vue 3 application, use the second argument of [createApp](/api/global-api.html#createapp).
+
+## 2.x Syntax
+
+In 2.x, we were able to pass props to a Vue instance during its creation:
+
+```js
+const Comp = Vue.extend({
+  props: ['username'],
+  template: '<div>{{ username }}</div>'
+})
+
+new Comp({
+  propsData: {
+    username: 'Evan'
+  }
+})
+```
+
+## 3.x Update
+
+The `propsData` option has been removed. If you need to pass props to the root component instance during its creation, you should use the second argument of `createApp`:
+
+```js
+const app = createApp(
+  {
+    props: ['username'],
+    template: '<div>{{ username }}</div>'
+  },
+  { username: 'Evan' }
+)
+```