Merge pull request #584 from forivall/patch-1

Add alternative way to get property type

Author: basarat

docs/types/moving-types.md

@@ -42,13 +42,19 @@ bar = '789'; // ERROR: Type `string` is not `assignable` to type `number`
 
 ## Capturing the type of a class member
 
-Similar to capturing the type of a variable, you just declare a variable purely for type capturing purposes:
+You can traverse into any non-nullable object type to retrieve the type of a property:
 
 ```ts
 class Foo {
   foo: number; // some member whose type we want to capture
 }
 
+let bar: Foo['foo']; // `bar` has type `number`
+```
+
+Alternatively, similar to capturing the type of a variable, you just declare a variable purely for type capturing purposes:
+
+```ts
 // Purely to capture type
 declare let _foo: Foo;