Update 0030-complex-join.mdx

site/docs/examples/JOIN/0030-complex-join.mdx

@@ -8,8 +8,10 @@ You can provide a function as the second argument to get a join
 builder for creating more complex joins. The join builder has a
 bunch of `on*` methods for building the `on` clause of the join.
 There's basically an equivalent for every `where` method
-(`on`, `onRef` etc.). You can do all the same things with the
-`on` method that you can with the corresponding `where` method.
+(`on`, `onRef` etc.). 
+
+You can do all the same things with the
+`on` method that you can with the corresponding `where` method (like [OR expressions for example](https://kysely.dev/docs/examples/WHERE/or-where)).
 See the `where` method documentation for more examples.
 
 import {
@@ -35,4 +37,4 @@ For example, check out these sections:
  - [leftJoin method](https://kysely-org.github.io/kysely-apidoc/interfaces/SelectQueryBuilder.html#leftJoin)
  - [rightJoin method](https://kysely-org.github.io/kysely-apidoc/interfaces/SelectQueryBuilder.html#rightJoin)
  - [fullJoin method](https://kysely-org.github.io/kysely-apidoc/interfaces/SelectQueryBuilder.html#fullJoin)
-:::
+:::