Modal dialogs can enhance usability by focusing attention on a specific message that requires a user action to continue.
An accessible modal dialog is one where keyboard focus is managed properly, and the correct information is exposed to screen readers.
Descriptive labels help users understand the purpose of a form control. Labels should be associated with their controls so that when the input is focused, the label is announced by screen readers.
For maximum usability, interactive elements must be operable by people who use assistive technology and people who use alternative input devices.
Landmarks help assistive-technology users navigate to and between areas of a page, and they improve the efficiency of in-page navigation.
The main landmark defines the unique content of the page.
When you include a list in your page content, this relationship needs to be conveyed visually, and it also needs to be conveyed to people using screen readers.
Some people understand complex information best when it's presented visually, such as as a chart or diagram, while others find that reading the information suits them better.
Make sure that the semantic meaning of your content is preserved, even if the visual display changes or the content isn’t visible.
Extending web site and application functionality through custom widgets and controls can significantly improve the user experience for everyone, making complex tasks possible via a web interface without requiring specialist software.
Paragraphs of text are a fundamental core of web content. It's important to display them in a fashion that is optimally readable to the majority of your audience.
The element is for data that one might find in a spreadsheet, consisting of rows and columns of cells. It's important to ensure that the editing process allows identifying row and column headers.