docs(directives): using global custom directives with typescript

src/guide/reusability/custom-directives.md

@@ -110,6 +110,10 @@ app.directive('highlight', {
 })
 ```
 
+It is possible to type global custom directives by extending the `ComponentCustomProperties` interface from `vue`
+
+More Details: [Typing Custom Global Directives](/guide/typescript/composition-api#typing-global-custom-directives) <sup class="vt-badge ts" />
+
 ## When to use custom directives {#when-to-use}
 
 Custom directives should only be used when the desired functionality can only be achieved via direct DOM manipulation.

src/guide/typescript/composition-api.md

@@ -468,7 +468,8 @@ import { useTemplateRef } from 'vue'
 import MyGenericModal from './MyGenericModal.vue'
 import type { ComponentExposed } from 'vue-component-type-helpers'
 
-const modal = useTemplateRef<ComponentExposed<typeof MyGenericModal>>('modal')
+const modal =
+  useTemplateRef<ComponentExposed<typeof MyGenericModal>>('modal')
 
 const openModal = () => {
   modal.value?.open('newValue')
@@ -477,3 +478,41 @@ const openModal = () => {
 ```
 
 Note that with `@vue/language-tools` 2.1+, static template refs' types can be automatically inferred and the above is only needed in edge cases.
+
+## Typing Global Custom Directives {#typing-global-custom-directives}
+
+In order to get type hints and type checking for global custom directives declared with `app.directive()`, you can extend `ComponentCustomProperties`
+
+```ts [src/directives/highlight.ts]
+import type { Directive } from 'vue'
+
+export type HighlightDirective = Directive<HTMLElement, string>
+
+declare module 'vue' {
+  export interface ComponentCustomProperties {
+    // prefix with v (v-highlight)
+    vHighlight: HighlightDirective
+  }
+}
+
+export default {
+  mounted: (el, binding) => {
+    el.style.backgroundColor = binding.value
+  }
+} satisfies HighlightDirective
+```
+
+```ts [main.ts]
+import highlight from './directives/highlight'
+// ...other code
+const app = createApp(App)
+app.directive('highlight', highlight)
+```
+
+Usage in component
+
+```vue [App.vue]
+<template>
+  <p v-highlight="'blue'">This sentence is important!</p>
+</template>
+```

src/guide/typescript/options-api.md

@@ -291,3 +291,7 @@ The placement of this augmentation is subject to the [same restrictions](#type-a
 See also:
 
 - [TypeScript unit tests for component type extensions](https://github.com/vuejs/core/blob/main/packages-private/dts-test/componentTypeExtensions.test-d.tsx)
+
+## Typing Global Custom Directives {#typing-global-custom-directives}
+
+See: [Typing Custom Global Directives](/guide/typescript/composition-api#typing-global-custom-directives) <sup class="vt-badge ts" />