The Accessibility Inspector also uses this information to provide valuable accessibility debugging capabilities in the DevTools. This is a bit like the DOM tree, except that it contains a more limited set of elements and slightly different information about them.Assistive technologies like screenreaders use this information to find out what's on a web page, tell their users what's there, and enable them to interact with the page. In such a situation, you can use WAI-ARIA role attributes to provide your own roles.Roles and other information exposed by browser accessibility APIs are presented in a hierarchical structure called the accessibility tree. Sometimes, however, you need to use some non-semantic markup (e.g., s) to build a complex custom control, and the control won't have a default role that reflects its purpose. Semantic DOM elements have roles assigned to them by default that hint at what their purpose is. Do yourself and your devices a big favor by installing Firefox on your devices.Here we are mainly talking about exposing information to people with visual disabilities — this is done via the accessibility APIs available inside web browsers, which expose information on what roles the different elements on your page play (e.g., are they just text, or are they buttons, links, form elements, etc.?).Mozilla today denied that it will 'ribbonize' upcoming Windows versions of Firefox, saying its plans to eliminate the traditional menu bar will yield something much simpler than Microsoft's often.Role — the role this item has on the page (e.g., pushbutton, or footer). Each item has two properties listed: Items with nested children have arrows that can be clicked to reveal the children, so you can move deeper into the hierarchy.On the right-hand side, you can see further information about the currently selected item. The name depends on the element for example, the name of most text elements is their textContent, whereas form elements' names are the contents of their associated. Name — the name this item has on the page.value — the value of the item. actions — a list of actions that can be performed on the item, for example, a pushbutton would have "Press" listed, while a link would have "Jump" listed. role — the item's role, as described above. name — the item's name, as described above.
![]() Note that this works correctly as of Firefox 62 ( bug 1467381). keyboardShortcut — any keyboard shortcut that is available to activate the element, as specified in an accessKey attribute. description — any further description provided on the element, usually by the content of a title attribute. Hovering over the "target" icon highlights the DOM node in the page content. You can click on the "target" icon that comes after it to select the node in the Page Inspector. DOMNode — the type of DOM node that the item in the accessibility tree represents. For example, one of the links in one demo has states of focusable, linked, selectable text, opaque, enabled, and sensitive. states — a list of the different accessibility-relevant states that can apply to the current item. If it is the second, it has a value of 1. If the item is the first item inside its parent, it has a value of 0. indexInParent — an index value indicating what number child the item is, inside its parent. This can include style-related attributes such as margin-left and text-indent, and other useful states for accessibility information, such as draggable and level (e.g., what heading level is it, in the case of headings). attributes — a list of all the accessibility-relevant attributes that are applied to the item. For example, in a form, an entry item could have a "labelled by" relation with a label item, which in turn has a "label for" relation to the entry item. relations — a list of the accessibility-relevant relationships between this item and other items. Best travel mouse for macText Labels — Check for issues with missing text labels.When you select one of the menu items, Firefox scans your document for the type of issues you selected. Keyboard — Check for issues with navigating via a keyboard. Contrast — Check for issues with visual contrast. All Issues — Check for all types of issues. None — Don't show the possible list of issues. The available menu items include: The Check for issues menuitems are a quick way to view all and only those items that have issues. Select the item to view that type of issue select the item again to clear the display of issues of that type.Issues with a particular item are always displayed in the Checks subpanel as you browse the tree. For each type of issue, there is a Learn more link to further information on MDN Web Docs about the issue.The menu items act as toggles. In the right side of the panel, the Checks subpanel lists the specific issue with the selected node. When the scan is complete, the left side of the Accessibility Inspector panel displays only the items that have that type of issue. See Color contrast for details about recommended contrast ratios.The color contrast in the image above is 2.86, so potentially not enough contrast to make it easy to read. This is useful for determining how the items in the accessibility tree relate to the UI items on the actual page.In the following example, you can see that the image has been highlighted and its role, graphic, name, "Road, Asphalt, Sky, Clouds, Fall", and the color contrast ratio, 3.46, appears in the information bar above it.Contrast ratio information is particularly useful when you are designing the color palette for your website because if the contrast is not sufficient, readers with visual impairments such as low vision or color blindness will be unable to read the text. The role and name of the item will be shown in a small information bar along with color contrast information if appropriate. ![]()
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