CSSRuleList (Java SE 9 & JDK 9 )
Keywords: org.w3c.dom.css.CSSRuleList interface

Module jdk.xml.dom
Package org.w3c.dom.css

## Interface CSSRuleList

-     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.