Nested mappings are not allowed in compact mappings

Explanation

Nested mappings refer to the usage of mappings within other mappings. In compact mappings, however, this is not allowed. Compact mappings are a simplified way of writing HTML code, where the opening and closing tags are omitted.

Here is an example to illustrate the concept:

  
Content 1
  
Content 2

  

In the above example, we have a compact mapping where two div elements are nested inside a parent div with the class “container”. Each nested div has the class “box” and contains some content.

If you try to use nested mappings in this format, it will not be valid:

  
Content 1
  

    
Nested Content
  

  

In the above example, the second nested div with the class “nested-box” violates the rule of not allowing nested mappings in compact mappings.