Read This First
The code in this example is not intended for production environments. Before using it for any purpose, read this to understand why.
This is an illustrative example of one way of using ARIA that conforms with the ARIA specification.
- There may be support gaps in some browser and assistive technology combinations, especially for mobile/touch devices. Testing code based on this example with assistive technologies is essential before considering use in production systems.
- The ARIA and Assistive Technologies Project is developing measurements of assistive technology support for APG examples.
- Robust accessibility can be further optimized by choosing implementation patterns that maximize use of semantic HTML and heeding the warning that No ARIA is better than Bad ARIA.
About This Example
The example below illustrates an implementation of the Table Pattern for a table with sortable rows.
The example uses HTML table markup for all elements of the table structure, e.g., cells, rows, column headers, and caption.
aria-sort attribute is set on the column header of the currently sorted column, and the header text of sortable columns is wrapped in a
One column, the
Address column is not sortable.
Similar examples include:
Adds a diamond shaped icon (e.g.
♢) to the header of each column that can be sorted but is not currently sorted.
Some sortable tables add an icon to unsorted columns to help users distinguish sortable columns from columns that cannot be sorted.
It is important that the shape of the unsorted icon differ in more than just color and size from the icons that indicate sort direction (e.g. '▼' and '▲') so people with visual impairments can easily distinguish them.
|123 Broad St.
|457 First St.
|456 Main St.
|2203 Logan Dr.
- To help screen reader users understand the purpose of the buttons in the column headers, an off-screen description of the sort functionality of the buttons is appended to the caption text. The description is added to the caption instead of to each button to prevent repetitious verbosity that could interfere with understanding of the column titles.
To enhance perceivability when operating the sort buttons, visual keyboard focus and hover are styled using CSS
- To make it easier to perceive when a button has focus, the focus indicator encompasses both the column label and sort direction icon.
- The cursor is changed to a pointer when hovering over the button to help people identify it as an interactive element.
- To make it easier to perceive that clicking either the column label or the sort direction icon will sort the table, hover styles the button and icon in the same way that focus does.
- To make activating sort easier for people with visual and movement impairments who are using a pointing device, the click target is maximized not only by making both the column label and sort icon clickable but also by using CSS positioning and sizing to make the button fill the entire header cell area.
- To ensure the sorting direction icons have sufficient contrast with the background when high contrast settings invert colors, character entities (e.g. '▼' and '▲') are used to indicate the sorting direction.
Not applicable: The only interactive elements are HTML button elements, and all their keyboard functionality is provided by browsers.
Role, Property, State, and Tabindex Attributes
|Removes the character entities used for sort icons from the accessibility tree to prevent them from being included in the accessible name of the sort buttons.
HTML Source Code