GitBook: [v28] one page modified

Author: christianalfoni

core/typescript.md

@@ -141,6 +141,7 @@ Read the guide on [**Using state machines**](../guides-1/using-state-machines.md
 You type your actions with the **Context** and an optional value. Any return type will be inferred.
 
 ```typescript
+import { Overmind } from 'overmind'
 import { Context } from 'app/overmind'
 
 export const noArgAction = (context: Context) => {
@@ -160,6 +161,11 @@ export const argWithReturnTypeAction = (context: Context, value: string) => {
   // actions.argWithReturnTypeAction("foo"), requires "string" and returns "string"
   return value + '!!!'
 }
+
+// The onInitialize action
+export const onInitializeOvermind = (context: Context, instance: Overmind<Context>) => {
+
+}
 ```
 
 Any of these actions could be defined as an **async** function or simply return a promise to be typed that way.