Some people with color deficit have trouble differentiating between specific colors, such as between red and green or red and black. Screen reader users do not access content visually, so they do not have access to color information.
Color is a powerful visual means of presenting or distinguishing information, but when you use color to identify or distinguish information, make sure that this information is still available to people who can't perceive color.
Autocomplete widgets can be helpful for accessibility because they can make it easier to enter text by providing suggestions based on the characters initially typed. This particularly helps people who find typing more difficult and people who may be susceptible to spelling mistakes.
Creating an accessible integrated autocomplete widget is a complex process. You need to ensure that screen-reader users are notified when the list of suggestions appears and that they can enter the list and select an option...
For a number of reasons including data persistence, performance and security, it is sometimes beneficial to terminate idle user sessions.
So that users do not lose data, it's important to warn them of a session that is about to expire and give them the option to continue. This is especially true in the case of people who might take longer to read or interact with a page due to a disability. It's important to make such prompts accessible.
Some people with reduced visual acuity may not need screen magnification software or screen readers but might still have problems reading smaller fonts. So the ability to allow easy enlargement of text size is important.
There are a number of ways to zoom web-page content in to enlarge text without needing to provide explicit controls to do so. To avoid diminishing this variety of user control, you have to be careful how you code font sizes.
Providing form feedback accessibly helps users submit data more accurately and reduces the chance for error. For learning resources, easy access to feedback supports the learning process; for forms collecting data, good feedback helps to reduce the chance of input errors being made.
Modal dialogs can enhance usability by focusing attention on a specific message that requires a user action to continue.
Expandables (sometimes called “collapsible” or “disclosure widgets”) are simple interface patterns that allow you to expand and collapse content. They can be helpful accessibility aids as they give users the choice of revealing content to read it, or bypassing the content, making page navigation more efficient for screen-reader users and people using the keyboard or alternative input devices.
To ensure that they are accessible, it's important that expandable sections are coded so that their state (...
Accessible names are the labels given to HTML elements that can be announced in assistive technologies such as screen readers. They may or may not be visible to sighted interface users, depending on context.
Whether you provide controls using standard HTML elements or create custom controls, ensure that controls are given appropriate names. There are a number of ways to provide accessible names.
Interactive elements should, under most circumstances, be focusable in the order that they appear in the source code. This helps people who are using the keyboard or alternative input devices to follow focus in a logical order.
The order that elements appear in the document source should reflect the order they appear visually.