Demo Spoiler Text:

Spoiler warning

Spoiler text. Note that it's important to have a space after the summary tag. You should be able to write any markdown you want inside the <details> tag... just make sure you close <details> afterward.

System.out.print("Hello World");

How to:

<details>
  <summary>Spoiler warning</summary>
  
  Spoiler text. Note that it's important to have a space after the summary tag. You should be able to write any markdown you want inside the `<details>` tag... just make sure you close `<details>` afterward.
  
  ```java
  System.out.print("Hello World");
  ```
  
</details>