# Class Ext.util.CSS

Package: | Ext.util
Defined In: | CSS.js
Class: | CSS
Extends: | Object

Utility class for manipulating CSS rules
This class is a singleton and cannot be created directly.

## Public Properties

This class has no public properties.

## Public Methods

Method | Defined By
--- | ---
| createStyleSheet( String cssText, String id ) : StyleSheet Creates a stylesheet from a text blob of rules. These rules will be wrapped in a STYLE tag and appended to the HEAD o... Creates a stylesheet from a text blob of rules. These rules will be wrapped in a STYLE tag and appended to the HEAD of the document. Parameters: `cssText` : String The text containing the css rules `id` : String An id to add to the stylesheet for later removal Returns: `StyleSheet` | CSS
| getRule( String/Array selector, Boolean refreshCache ) : CSSRule Gets an an individual CSS rule by selector(s) Gets an an individual CSS rule by selector(s) Parameters: `selector` : String/Array The CSS selector or an array of selectors to try. The first selector that is found is returned. `refreshCache` : Boolean true to refresh the internal cache if you have recently updated any rules or added styles dynamically Returns: `CSSRule` The CSS rule or null if one is not found | CSS
| getRules( Boolean refreshCache ) : Object Gets all css rules for the document Gets all css rules for the document Parameters: `refreshCache` : Boolean true to refresh the internal cache Returns: `Object` An object (hash) of rules indexed by selector | CSS
| refreshCache() : Object Refresh the rule cache if you have dynamically added stylesheets Refresh the rule cache if you have dynamically added stylesheets Parameters: None. Returns: `Object` An object (hash) of rules indexed by selector | CSS
| removeStyleSheet( String id ) : void Removes a style or link tag by id Removes a style or link tag by id Parameters: `id` : String The id of the tag Returns: void | CSS
| swapStyleSheet( String id, String url ) : void Dynamically swaps an existing stylesheet reference for a new one Dynamically swaps an existing stylesheet reference for a new one Parameters: `id` : String The id of an existing link tag to remove `url` : String The href of the new stylesheet to include Returns: void | CSS
| updateRule( String/Array selector, String property, String value ) : Boolean Updates a rule property Updates a rule property Parameters: `selector` : String/Array If it's an array it tries each selector until it finds one. Stops immediately once one is found. `property` : String The css property `value` : String The new value for the property Returns: `Boolean` true If a rule was found and updated | CSS

## Public Events

This class has no public events.