@progress/wct-a11y-spec/dist/design-system/ColorGradient.json

Contains accessibility and keyboard navigation specification of Telerik and Kendo web components.

[
    {
        "h2": "Accessibility Support"
    },
    {
        "p": "Out of the box, the Telerik and Kendo UI ColorGradient provides extensive accessibility support and enables users with disabilities to acquire complete control over its features."
    },
    {
        "p": "The ColorGradient is compliant with the [Web Content Accessibility Guidelines (WCAG) 2.2 standards](https://www.w3.org/TR/WCAG22/) and [Section 508](http://www.section508.gov/) requirements, follows the [Web Accessibility Initiative - Accessible Rich Internet Applications (WAI-ARIA)](https://www.w3.org/WAI/ARIA/apg/) best practices for implementing the [keyboard navigation](#keyboard-navigation) for its `component` role, provides options for [managing its focus](#managing-the-focus) and is tested against the most popular [screen readers](#screen-readers)."
    },
    {
        "h3": "WAI-ARIA"
    },
    {
        "p": "This section lists the selectors, attributes, and behavior patterns supported by the component and its composite elements, if any."
    },
    {
        "h4": "ColorGradient Wrapping Element"
    },
    {
        "table": {
            "headers": [
                "Selector",
                "Attribute",
                "Usage"
            ],
            "rows": [
                {
                    "Selector": "`.k-colorgradient`",
                    "Attribute": "`role=textbox`",
                    "Usage": "The focusable wrapper of the component should be considered a `textbox`. That signifies it has a value that could be submitted."
                },
                {
                    "Selector": "",
                    "Attribute": "`aria-label` or `aria-labelledby`",
                    "Usage": "The component needs an accessible name to be assigned to it. Must also include the currently selected value in the component."
                },
                {
                    "Selector": "",
                    "Attribute": "`aria-invalid=true`",
                    "Usage": "Attribute is rendered only when the selected value in the component is not valid against the current validation rules."
                },
                {
                    "Selector": "",
                    "Attribute": "`tabindex=0`",
                    "Usage": "The element must be focusable."
                },
                {
                    "Selector": "`.k-colorgradient.k-disabled`",
                    "Attribute": "`aria-disabled=true`",
                    "Usage": "Attribute is rendered only when the ColorPalette is disabled."
                }
            ]
        }
    },
    {
        "h4": "Drag handles"
    },
    {
        "p": "All the `k-draghandle` elements implement the **Slider** specification."
    },
    {
        "link": {
            "title": "Slider accessibility specification",
            "source": "{{slider_a11y_link}}"
        }
    },
    {
        "p": "Apart from that the HSV draghandle must also cover the following additional requirements:"
    },
    {
        "table": {
            "headers": [
                "Selector",
                "Attribute",
                "Usage"
            ],
            "rows": [
                {
                    "Selector": "`.k-hsv-draghandle`",
                    "Attribute": "`aria-orientation=undefined`",
                    "Usage": "The implicit orientation for the `role=\"slider\"` must be removed."
                },
                {
                    "Selector": "",
                    "Attribute": "`aria-label`",
                    "Usage": "Must provide information about the purpose of the `slider` (for example: \"Color well with two-dimensional slider for selecting saturation and lightness\") and the currently selected color (for example: \"X: 142, Y: 93\")."
                },
                {
                    "Selector": "",
                    "Attribute": "`aria-valuetext`",
                    "Usage": "Must specify the values on both X and Y axis."
                }
            ]
        }
    },
    {
        "h4": "NumericTextBoxes"
    },
    {
        "p": "The Numeric inputs must implement the **NumericTextBox** specification."
    },
    {
        "link": {
            "title": "NumericTextBox accessibility specification",
            "source": "{{numerictextbox_a11y_link}}"
        }
    },
    {
        "p": "Here is one additional requirement for those numerics as their visible labels have only a single letter as text:"
    },
    {
        "table": {
            "headers": [
                "Selector",
                "Attribute",
                "Usage"
            ],
            "rows": [
                {
                    "Selector": "`.k-numerictextbox>.k-input-inner`",
                    "Attribute": "`aria-label`",
                    "Usage": "Must provide information about the numeric input purpose - the name of the chanel it is aimed at (`red chanel`, `green chanel`, `blue chanel`, or `alpha chanel`)."
                }
            ]
        }
    },
    {
        "h3": "Managing the Focus"
    },
    {
        "p": "The ColorGradient is a single-tab-stop component. Its inner navigation is activated by pressing the `Enter` key. In that case the focus remains trapped within the component elements. The user returns to page navigation by pressing `Esc`."
    },
    {
        "h3": "Keyboard Shortcuts"
    },
    {
        "h4": "When wrapper is focused"
    },
    {
        "table": {
            "headers": [
                "Shortcut",
                "Behavior"
            ],
            "rows": [
                {
                    "Shortcut": "`Enter`",
                    "Behavior": "Activates inner ColorGradient navigation."
                },
                {
                    "Shortcut": "`Tab`",
                    "Behavior": "Navigates to the next focusable element on the page."
                },
                {
                    "Shortcut": "`Shift` + `Tab`",
                    "Behavior": "Navigates to the previous focusable element on the page."
                }
            ]
        }
    },
    {
        "h4": "When inner navigation is activated"
    },
    {
        "table": {
            "headers": [
                "Shortcut",
                "Behavior"
            ],
            "rows": [
                {
                    "Shortcut": "`Esc`",
                    "Behavior": "Moves focus back to wrapper element. Deactivates inner ColorGradient navigation."
                },
                {
                    "Shortcut": "`Tab`",
                    "Behavior": "Navigates to the next focusable element in the ColorGradient. If current focus is on the last element, moves focus to the first focusable item in the component."
                },
                {
                    "Shortcut": "`Shift` + `Tab`",
                    "Behavior": "Navigates to the previous focusable element in the ColorGradient. If current focus is on the first element, moves focus to the last focusable item in the component."
                },
                {
                    "Shortcut": "`Enter`",
                    "Behavior": "For button items, ColorGradient executes the currently focused button action."
                }
            ]
        }
    },
    {
        "h4": "Inner elements shortcuts"
    },
    {
        "p": "The inner elements implement the shortcuts for their component type. There are `k-draghandle` (**Slider**) elements and `k-numerictextbox` (**NumericTextBox**) elements."
    },
    {
        "h4": "k-hsv-draghandle"
    },
    {
        "p": "Apart from the default implementation, there is a two-dimensional **Slider** element (`k-hsv-draghandle`) implementing the following arrow keys shortcuts:"
    },
    {
        "table": {
            "headers": [
                "Shortcut",
                "Behavior"
            ],
            "rows": [
                {
                    "Shortcut": "`Arrow Up`",
                    "Behavior": "Moves slider up by large step."
                },
                {
                    "Shortcut": "`Arrow Down`",
                    "Behavior": "Moves slider down by large step."
                },
                {
                    "Shortcut": "`Arrow Left`",
                    "Behavior": "Moves slider left by large step."
                },
                {
                    "Shortcut": "`Arrow Right`",
                    "Behavior": "Moves slider right by large step."
                },
                {
                    "Shortcut": "`Shift` + `Arrow Up`",
                    "Behavior": "Moves slider up by small step."
                },
                {
                    "Shortcut": "`Shift` + `Arrow Down`",
                    "Behavior": "Moves slider down by small step."
                },
                {
                    "Shortcut": "`Shift` + `Arrow Left`",
                    "Behavior": "Moves slider left by small step."
                },
                {
                    "Shortcut": "`Shift` + `Arrow Right`",
                    "Behavior": "Moves slider right by small step."
                }
            ]
        }
    },
    {
        "h3": "Testing"
    },
    {
        "p": "The ColorGradient has been extensively tested automatically with [axe-core](https://github.com/dequelabs/axe-core) and manually with the most popular screen readers."
    },
    {
        "h3": "Screen Readers"
    },
    {
        "p": "The ColorGradient has been tested with the following screen readers and browsers combinations:"
    },
    {
        "table": {
            "headers": [
                "Environment",
                "Tool"
            ],
            "rows": [
                [
                    "Firefox",
                    "NVDA"
                ],
                [
                    "Chrome",
                    "JAWS"
                ],
                [
                    "Microsoft Edge",
                    "JAWS"
                ]
            ]
        }
    }
]