:root Selector

jQuery

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:root Selector

Categories: Selectors > Basic Filter

root selector

Description: Selects the element that is the root of the document.

  • version added: 1.9jQuery( ":root" )

    index: The index of each child to match, starting with 1, the string even or odd, or an equation ( eg. :nth-last-child(even), :nth-last-child(4n) )

In HTML, the root of the document, and thus the element that $(":root") selects, is always the <html> element.

Example:

Display the tag name of the root element.

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                                        <!DOCTYPE html>
                                      
                                    

                                  

                                  

                                    

                                      
                                        <html>
                                      
                                    

                                  

                                  

                                    

                                      
                                        <head>
                                      
                                    

                                  

                                  

                                    

                                        <style>
                                    

                                  

                                  

                                    

                                      span.fot { color: red; font-size: 120%; font-style: italic; }
                                    

                                  

                                  

                                    

                                        </style>
                                    

                                  

                                  

                                    

                                        <script src="http://code.jquery.com/jquery-latest.js"></script>
                                    

                                  

                                  

                                    

                                      
                                        </head>
                                      
                                    

                                  

                                  

                                    

                                      
                                        <body>
                                      
                                    

                                  

                                  

                                    

                                        <div id="log">The root of this document is: </div>
                                    

                                  

                                  

                                    

                                      
                                        <script>
                                        
                                      
                                    

                                  

                                  

                                    

                                      $( "<b></b>" ).html( $( ":root" )[0].nodeName ).appendTo( "#log" );
                                    

                                  

                                  

                                    

                                      
                                        </script>
                                      
                                    

                                  

                                  

                                    

                                       
                                    

                                  

                                  

                                    

                                      
                                        </body>
                                      
                                    

                                  

                                  

                                    

                                      
                                        </html>
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