CSSRuleList (Java SE 11 & JDK 11 )

```
public interface CSSRuleList
```
The CSSRuleList interface provides the abstraction of an ordered collection of CSS rules.
The items in the CSSRuleList are accessible via an integral index, starting from 0.
See also the Document Object Model (DOM) Level 2 Style Specification.

Since:

1.4, DOM Level 2

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`getLength()`	The number of `CSSRules` in the list.
`CSSRule`	`item(int index)`	Used to retrieve a CSS rule by ordinal index.

- Method Detail
  - getLength
```
int getLength()
```
    The number of CSSRules in the list. The range of valid child rule indices is 0 to length-1 inclusive.
  - item
```
CSSRule item(int index)
```
    Used to retrieve a CSS rule by ordinal index. The order in this collection represents the order of the rules in the CSS style sheet. If index is greater than or equal to the number of rules in the list, this returns null.
    
    Parameters:
    
    index - Index into the collection
    
    Returns:
    
    The style rule at the index position in the CSSRuleList, or null if that is not a valid index.