HTML: A good basis for accessibility Learn web development MDN

Check the contrast of borders for input elements (text input, radio buttons, checkboxes, etc.). If a link does, ensure the link’s behavior will be communicated in a way that is apparent to all users. Doing this will help people understand what will happen before activating the link. While this technique is technically not required for compliance, it is an often-cited area of frustration for many different kinds of assistive technology users. Links should always have a href attribute, even when used in Single Page Applications .

All content that is available to non-assistive technology users must be made available to assistive technologies. Similarly, no features should be included targeting assistive technology users that aren’t also accessible to those not using assistive technologies. The above progressbar needs to be styled to make it look like a progressbar. In the bad old days, people used to create page layouts using HTML tables — using different table cells to contain the header, footer, sidebar, main content column, etc. This is not a good idea because a screen reader will likely give out confusing readouts, especially if the layout is complex and has many nested tables.

How to Create a Range Slider in HTML + CSS

Landmark regions help communicate the layout and important areas of a page or view, and can allow quick access to these regions. For example, use the nav element to wrap a site’s navigation, and the main element to contain the primary content of a page. However, addressing the issues called out in this checklist will help improve the experience for everyone who uses your site. This checklist targets many, but not all level A and AA concerns. Note that the different levels of WCAG support do not necessarily indicate an increased level of difficulty to implement.

• Styles used are exposed by UIA text attributes of the TextRange Control Pattern implemented on a parent accessible object.
• The Accessible Rich Internet Applications suite of web standards, shortened to ARIA, is a set of standards to make user interface controls more accessible for those using assistive technologies.
• The value of the href attribute is stored in the Value.Value UIA property.

Exposed by TextFlowDirections attribute of the TextRange Control Pattern implemented on a parent accessible object. All elements having an accessible object in IAccessible2 mapping are supposed to implement IAccessible, IAccessible2 and IAccessible2_2 interfaces. “Not mapped” means the attribute does not need to be exposed via an accessibility API. This is usually because the attribute is not displayed as part of the user interface. ATK_RELATION_LABEL_FOR for a child form element or form element referred by for attribute.

Color contrast

You’ll notice in the code example above that the image’s alt attribute is empty — this is to make screen readers recognize the image, but not attempt to describe the image (instead they’d just say “image”, or similar). If you do want to provide extra contextual information, you should put it in the text surrounding the image, or inside a title attribute, as shown above. In this case, most screen readers will read out the alt text, the title attribute, and the filename. In addition, browsers display title text as tooltips when moused over.

It is also important to acknowledge that some people who rely on assistive technology are reluctant to upgrade their software, for fear of losing the ability to interact with their computer and browser. Because of this, it is important to use semantic HTML elements whenever possible, as semantic HTML has far better support for assistive technology. Note that the contents of the alt attribute should always provide a direct representation of the image and what it conveys visually. The alt should be brief and concise and include all the information conveyed in the image that is not duplicated in the surrounding text. The first image, when viewed by a screen reader, doesn’t really offer the user much help — VoiceOver for example reads out “/dinosaur.png, image”. Controls are interactive elements such as links and buttons that let a person navigate to a destination or perform an action. Remove tabindex attribute values that aren’t either 0 or -1.

12 Other Tabular data elements

When the Web meets this goal, it is accessible to people with a diverse range of hearing, movement, sight, and cognitive ability. However, at their most basic level, web pages are just text documents that can be reconfigured as needed. With some extra tweaking and several accessibility checks, you’ll quickly improve the browsing experience for your visitors who need it.

If the ball is Fluffy’s favorite toy or if the sited user can’t know that from the image, then don’t include it. As an added bonus, in most browsers associating a label with a form input means that you can click the label to select or activate the form element. This gives the input a bigger hit area, making it easier to select.

ARIA for scripted widgets

One thing to consider is whether your images have meaning inside your content, or whether they are purely for visual decoration, and thus have no meaning. If they are decorative, it is better to write an empty text as a value for alt attribute or to just include them in the page as CSS background images. Here we add a listener to the document object to detect when a button has been pressed on the keyboard. We check what button was pressed via the event object’s key property; if the key pressed is Enter/Return, we run the function stored in the button’s onclick handler using document.activeElement.click(). ActiveElement which gives us the element that is currently focused on the page. One key aspect of the accessibility of UI controls is that by default, browsers allow them to be manipulated by the keyboard. You can try this out using our native-keyboard-accessibility.html example .

The Accessible Name and Description Computation section specifies if the title attribute will be mapped and, if so, through what [WAI-ARIA] property. If the input is in the Range state, set both RangeValue.SmallChange and RangeValue.LargeChange to the value of step. Exposed as atk_value_get_minimum_increment if the element implements the AtkValue interface.

Create Good Link Text

Terms like “click here” and “read more” do not provide any context. Some people navigate using a list of all buttons or links on a page or view. When using this mode, the terms indicate what will happen if navigated to or activated. If you want to hide content visually and from screen readers, use the hidden attribute.