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                      Accordion (Sections With Show/Hide Functionality)
                    
                  
                  
        An accordion is a vertically stacked set of interactive headings that each contain a title, content snippet, or thumbnail representing a section of content.
                 
               
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                      Alert
                    
                  
                  
        An alert is an element that displays a brief, important message in a way that attracts the user's attention without interrupting the user's task.
                 
               
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                      Alert and Message Dialogs
                    
                  
                  
        An alert dialog  is a modal dialog that interrupts the user's workflow to communicate an important message and acquire a response.
                 
               
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                      Breadcrumb
                    
                  
                  
        A breadcrumb trail consists of a list of links to the parent pages of the current page in hierarchical order.
                 
               
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                      Button
                    
                  
                  
        A button is a widget that enables users to trigger an action or event, such as submitting a form, opening a dialog, canceling an action, or performing a delete operation.
                 
               
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                      Carousel (Slide Show or Image Rotator)
                    
                  
                  
        A carousel presents a set of items, referred to as slides, by sequentially displaying a subset of one or more slides.
                 
               
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                      Checkbox
                    
                  
                  
WAI-ARIA supports two types of checkbox widgets: dual-state allows the user to toggle between two  choices -- checked and not checked -- and tri-state supports an additional third state known as partially checked.
                 
               
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                      Combobox
                    
                  
                  
        A combobox is an input widget with an associated popup that enables users to select a value for the combobox from a collection of possible values.
                 
               
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                      Dialog (Modal)
                    
                  
                  
        A dialog is a window overlaid on either the primary window or another dialog window.
                 
               
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                      Disclosure (Show/Hide)
                    
                  
                  
        A disclosure is a widget that enables content to be either collapsed (hidden) or expanded (visible).
                 
               
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                      Feed
                    
                  
                  
        A feed is a section of a page that automatically loads new sections of content as the user scrolls.
                 
               
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                      Grids : Interactive Tabular Data and Layout Containers
                    
                  
                  
        A grid widget is a container that enables users to navigate the information or interactive elements it contains using directional navigation keys, such as arrow keys, Home, and End.
                 
              
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                        Landmarks
                      
                    
                    
                      Landmarks provide a powerful way to identify the 
                      organization and structure of a web page.
                    
                   
                 
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                      Link
                    
                  
                  
        A link widget provides an interactive reference to a resource.
                 
               
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                      Listbox
                    
                  
                  
        A listbox widget presents a list of options and allows a user to select one or more of them.
                 
               
                
               
                
               
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                      Meter
                    
                  
                  
        A meter is a graphical display of a numeric value that varies within a defined range.
                 
               
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                      Radio Group
                    
                  
                  
        A radio group is a set of checkable buttons, known as radio buttons, where no more than one of
        the buttons can be checked at a time.
                 
               
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                      Slider
                    
                  
                  
        A slider is an input where the user selects a value from within a given range.
                 
               
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                      Slider (Multi-Thumb)
                    
                  
                  
        A multi-thumb slider is a slider
        with two or more thumbs that each set a value in a group of related values.
                 
               
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                      Spinbutton
                    
                  
                  
        A spinbutton is an input widget that restricts its value to a set or range of discrete values.
                 
               
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                      Switch
                    
                  
                  
        A switch is an input widget that allows users to choose one of two values: on
 or off
.
                 
               
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                      Table
                    
                  
                  
        Like an HTML 
table element, a 
WAI-ARIA table is a static tabular structure containing one or more rows that each contain one or more cells; it is not an interactive widget.
 
                 
               
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                      Tabs
                    
                  
                  
        Tabs are a set of layered sections of content, known as tab panels, that display one panel of content at a time.
                 
               
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                      Toolbar
                    
                  
                  A toolbar is a container for grouping a set of controls, such as buttons, menubuttons, or checkboxes.
                 
               
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                      Tooltip Widget
                    
                  
                  
        A tooltip is a popup that displays information related to an element when the element receives keyboard focus or the mouse hovers over it.
                 
               
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                      Tree View
                    
                  
                  
        A tree view widget presents a hierarchical list.
                 
               
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                      Treegrid
                    
                  
                  
          A treegrid widget presents a hierarchical data grid consisting of tabular information that is editable or interactive.
                 
               
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                      Window Splitter
                    
                  
                  
        A window splitter is a moveable separator between two sections, or panes, of a window that enables users to change the relative size of the panes.