:even Selector

jQuery

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:even Selector

Categories: Selectors > Basic Filter | Selectors > jQuery Extensions

even selector

Description: Selects even elements, zero-indexed. See also odd.

  • version added: 1.0jQuery( ":even" )

In particular, note that the 0-based indexing means that, counter-intuitively, :even selects the first element, third element, and so on within the matched set.

Additional Notes:

  • Because :even is a jQuery extension and not part of the CSS specification, queries using :even cannot take advantage of the performance boost provided by the native DOM querySelectorAll() method. To achieve the best performance when using :even to select elements, first select the elements using a pure CSS selector, then use .filter(":even").
  • Selected elements are in the order of their appearance in the document.

Example:

Finds even table rows, matching the first, third and so on (index 0, 2, 4 etc.).

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                                        <!DOCTYPE html>
                                      
                                    

                                  

                                  

                                    

                                      
                                        <html>
                                      
                                    

                                  

                                  

                                    

                                      
                                        <head>
                                      
                                    

                                  

                                  

                                    

                                        <style>
                                    

                                  

                                  

                                    

                                        table {
                                    

                                  

                                  

                                    

                                          background:#eeeeee;
                                    

                                  

                                  

                                    

                                        }
                                    

                                  

                                  

                                    

                                        </style>
                                    

                                  

                                  

                                    

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

                                  

                                  

                                    

                                      
                                        </head>
                                      
                                    

                                  

                                  

                                    

                                      
                                        <body>
                                      
                                    

                                  

                                  

                                    

                                        <table border="1">
                                    

                                  

                                  

                                    

                                          <tr><td>Row with Index #0</td></tr>
                                    

                                  

                                  

                                    

                                          <tr><td>Row with Index #1</td></tr>
                                    

                                  

                                  

                                    

                                       
                                    

                                  

                                  

                                    

                                          <tr><td>Row with Index #2</td></tr>
                                    

                                  

                                  

                                    

                                          <tr><td>Row with Index #3</td></tr>
                                    

                                  

                                  

                                    

                                        </table>
                                    

                                  

                                  

                                    

                                      
                                        <script>
                                        $("tr:even").css("background-color", "#bbbbff");
                                        </script>
                                      
                                    

                                  

                                  

                                    

                                       
                                    

                                  

                                  

                                    

                                      
                                        </body>
                                      
                                    

                                  

                                  

                                    

                                      
                                        </html>
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