ARIA Grid: Supporting nonvisual layout and keyboard traversal Modern web applications contain complex and dense user interface patterns — infinitely scrolling lists of content, menu bars, and complex data tables with interactive controls in cells, to name a few components. With a mouse pointer, a person can easily traverse the controls and items of an application. For a keyboard user, traversing a page via the Tab key becomes more cumbersome as the number of controls and items increases. A modern web page may contain hundreds of tab stops — elements that can be traversed using the Tab key. At Facebook, we are experimenting with a user interface pattern for traversing a page with a keyboard that we call a logical grid. A logical grid reduces numerous tab stops to a single tab stop within a part of the interface designated as a grid. From the single tab stop, a person can traverse items in the grid using arrow keys. In addition, Accessible Rich Internet Application...
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