.size()

jQuery

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.size()

Categories: Miscellaneous > DOM Element Methods

.size() Returns: Number version deprecated: 1.8

Description: Return the number of elements in the jQuery object.

  • version added: 1.0.size()

    • This method does not accept any arguments.

The .size() method is deprecated as of jQuery 1.8. Use the .length property instead.

The .size() method is functionally equivalent to the .length property; however, the .length property is preferred because it does not have the overhead of a function call.

Given a simple unordered list on the page:

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                                      <ul>
                                    
                                  

                                

                                

                                  

                                      <li>foo</li>
                                  

                                

                                

                                  

                                      <li>bar</li>
                                  

                                

                                

                                  

                                    
                                      </ul>

Both .size() and .length identify the number of items:

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                                    alert( "Size: " + $("li").size() );
                                  

                                

                                

                                  

                                    alert( "Size: " + $("li").length );

This results in two alerts:

Size: 2

Size: 2

Example:

Count the divs. Click to add more.

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                                        <!DOCTYPE html>
                                      
                                    

                                  

                                  

                                    

                                      
                                        <html>
                                      
                                    

                                  

                                  

                                    

                                      
                                        <head>
                                      
                                    

                                  

                                  

                                    

                                        <style>
                                    

                                  

                                  

                                    

                                        body { cursor:pointer; min-height: 100px; }
                                    

                                  

                                  

                                    

                                        div { width:50px; height:30px; margin:5px;
                                    

                                  

                                  

                                    

                                              float:left; background:blue; }
                                    

                                  

                                  

                                    

                                        span { color:red; }
                                    

                                  

                                  

                                    

                                       </style>
                                    

                                  

                                  

                                    

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

                                  

                                  

                                    

                                      
                                        </head>
                                      
                                    

                                  

                                  

                                    

                                      
                                        <body>
                                      
                                    

                                  

                                  

                                    

                                       
                                    

                                  

                                  

                                    

                                      
                                        <span>
                                        </span>
                                      
                                    

                                  

                                  

                                    

                                       <div></div>
                                    

                                  

                                  

                                    

                                       
                                    

                                  

                                  

                                    

                                      
                                        <script>
                                        
                                      
                                    

                                  

                                  

                                    

                                      $(document.body)
                                    

                                  

                                  

                                    

                                      .click(function() {
                                    

                                  

                                  

                                    

                                        $(this).append( $("<div>") );
                                    

                                  

                                  

                                    

                                        var n = $("div").size();
                                    

                                  

                                  

                                    

                                        $("span").text("There are " + n + " divs. Click to add more.");
                                    

                                  

                                  

                                    

                                      })
                                    

                                  

                                  

                                    

                                      
                                        // trigger the click to start
                                      
                                    

                                  

                                  

                                    

                                      .click();
                                    

                                  

                                  

                                    

                                      
                                        </script>
                                      
                                    

                                  

                                  

                                    

                                       
                                    

                                  

                                  

                                    

                                      
                                        </body>
                                      
                                    

                                  

                                  

                                    

                                      
                                        </html>
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