-The CSSGroupingRule interface

-[Exposed=Window]
-interface CSSGroupingRule : CSSRule {
-    readonly attribute CSSRuleList cssRules;
-    unsigned long insertRule (CSSOMString rule, unsigned long index);
-    void deleteRule (unsigned long index);
-};
-

-

cssRules of type CSSRuleList, readonly -

The cssRules attribute must return a CSSRuleList - object for the list of CSS rules nested inside the grouping rule. -

-

insertRule(CSSOMString rule, unsigned long index), returns - unsigned long -

- The insertRule operation must - insert a CSS rule rule - into the CSS rule list returned by cssRules, - such that the inserted rule will be at position index, - and any rules previously at index or higher - will increase their index by one. - It must throw INDEX_SIZE_ERR - if index is greater than cssRules.length. - It must throw SYNTAX_ERR - if rule has a syntax error and is unparseable; - this does not include syntax errors handled by error handling rules - for constructs inside of the rule, - but this does include cases where the string given - does not parse into a single CSS rule (such as when the string is empty) - or where there is anything other than whitespace or comments - after that single CSS rule. - It must throw HIERARCHY_REQUEST_ERR - if the rule cannot be inserted at the location specified, - for example, if an ''@import'' rule is inserted inside a group rule. - - The return value is the index parameter. - -

deleteRule (unsigned long index), return void -

- The deleteRule operation must - remove a CSS rule from - the CSS rule list returned by cssRules at index. - It must throw INDEX_SIZE_ERR - if index is greater than or equal to cssRules.length. -

The CSSConditionRule interface