2.1.0

Changed

• Update to accname 1.1.0, including iframe support
• Support aria-pressed
• Support for different quote characters in locator generation
• Return null for getRole(<element with invalid role attribute>)
• Polyfill Array.from to support older browsers

Fixed

• Improve the performance of generating many locators with batch generation methods
• Improve the performance of locator resolution by memoizing names
• More efficient detection of ancestor elements with "presentational children"