xxxxxxxxxx
<details>
<summary>some plain text</summary>
# back to markdown mode
</details>
<!-- blank lines surrounding the block are important -->
xxxxxxxxxx
<details>
<summary>Click me</summary>
### Heading
1. Foo
2. Bar
* Baz
* Qux
### Some Code
```js
function logSomething(something) {
console.log('Something', something);
}
```
</details>