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Expand TypeScript generics section with example of invalid type argument #3458

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Expand TypeScript generics section with example of invalid type argument #3458

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3 changes: 3 additions & 0 deletions packages/documentation/copy/en/handbook-v2/More on Functions.md
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Expand Up @@ -190,6 +190,8 @@ const longerArray = longest([1, 2], [1, 2, 3]);
const longerString = longest("alice", "bob");
// Error! Numbers don't have a 'length' property
const notOK = longest(10, 100);
// Error! An array of numbers and a string can't be compared
const alsoNotOK = longest([1, 2], 'alice');
```

There are a few interesting things to note in this example.
Expand Down Expand Up @@ -887,3 +889,4 @@ const f3 = function (): void {
For more on `void` please refer to these other documentation entries:

- [FAQ - "Why are functions returning non-void assignable to function returning void?"](https://github.com/Microsoft/TypeScript/wiki/FAQ#why-are-functions-returning-non-void-assignable-to-function-returning-void)