Users/aubreyquinn/swatch picker #147
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| # Accessibility: SwatchPicker must have an accessible name via aria-label, aria-labelledby, Field component, etc. (`@microsoft/fluentui-jsx-a11y/swatchpicker-needs-labelling`) | ||
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| 💼 This rule is enabled in the ✅ `recommended` config. | ||
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| <!-- end auto-generated rule header --> | ||
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| All interactive elements must have an accessible name. | ||
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| SwatchPicker without a label or accessible labeling lack an accessible name for assistive technology users. | ||
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| <https://www.w3.org/WAI/standards-guidelines/act/rules/e086e5/> | ||
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| ## Ways to fix | ||
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| - Add an aria-label or aria-labelledby attribute to the SwatchPicker tag. You can also use the Field component. | ||
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| ## Rule Details | ||
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| This rule aims to make SwatchPickers accessible. | ||
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| Examples of **incorrect** code for this rule: | ||
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| ```jsx | ||
| <SwatchPicker /> | ||
| <Radio></Radio> | ||
| ``` | ||
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| ```jsx | ||
| <Label>This is a switch.</Label> | ||
| <SwatchPicker | ||
| onChange={onChange} | ||
| /> | ||
| ``` | ||
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| Examples of **correct** code for this rule: | ||
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| ```jsx | ||
| <Label id="my-label-1">This is a Radio.</Label> | ||
| <SwatchPicker | ||
| delectedValue="00B053" | ||
| onSelectionChange={onSel} | ||
| aria-labelledby="my-label-1" | ||
| /> | ||
| ``` | ||
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| ```jsx | ||
| <SwatchPicker aria-label="anything" selectedValue="00B053" onSelectionChange={onSel}> | ||
| <ColorSwatch color="#FF1921" value="FF1921" aria-label="red" /> | ||
| <ColorSwatch color="#00B053" value="00B053" aria-label="green" /> | ||
| </SwatchPicker> | ||
| ``` | ||
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| ```jsx | ||
| <Field label="Pick a colour"> | ||
| <SwatchPicker> | ||
| <ColorSwatch color="#FF1921" value="FF1921" aria-label="red" /> | ||
| <ColorSwatch color="#00B053" value="00B053" aria-label="green" /> | ||
| </SwatchPicker> | ||
| </Field> | ||
| ``` |
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| Original file line number | Diff line number | Diff line change |
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| // Copyright (c) Microsoft Corporation. | ||
| // Licensed under the MIT License. | ||
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| import { ESLintUtils } from "@typescript-eslint/utils"; | ||
| import { makeLabeledControlRule } from "../util/ruleFactory"; | ||
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| //------------------------------------------------------------------------------ | ||
| // Rule Definition | ||
| //------------------------------------------------------------------------------ | ||
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| export default ESLintUtils.RuleCreator.withoutDocs( | ||
| makeLabeledControlRule( | ||
| { | ||
| component: "SwatchPicker", | ||
| labelProps: ["aria-label"], | ||
| allowFieldParent: true, | ||
| allowFor: false, | ||
| allowLabelledBy: true, | ||
| allowWrappingLabel: false | ||
| }, | ||
| "noUnlabeledSwatchPicker", | ||
| "Accessibility: SwatchPicker must have an accessible name via aria-label, aria-labelledby, Field component, etc.." | ||
| ) | ||
| ); | ||
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| // Copyright (c) Microsoft Corporation. | ||
| // Licensed under the MIT License. | ||
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| import { TSESLint, TSESTree } from "@typescript-eslint/utils"; | ||
| import { hasNonEmptyProp } from "./hasNonEmptyProp"; | ||
| import { hasAssociatedLabelViaAriaLabelledBy, isInsideLabelTag, hasAssociatedLabelViaHtmlFor } from "./labelUtils"; | ||
| import { hasFieldParent } from "./hasFieldParent"; | ||
| import { elementType } from "jsx-ast-utils"; | ||
| import { JSXOpeningElement } from "estree-jsx"; | ||
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| export type LabeledControlConfig = { | ||
| component: string | RegExp; | ||
| labelProps: string[]; // e.g. ["label", "aria-label"] | ||
| allowFieldParent?: boolean; // e.g. <Field label=...><RadioGroup/></Field> | ||
| allowFor?: boolean; // htmlFor | ||
| allowLabelledBy?: boolean; // aria-labelledby | ||
| allowWrappingLabel?: boolean; // <label>...</label> | ||
| }; | ||
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| /** | ||
| * Returns `true` if the JSX opening element is considered **accessibly labelled** | ||
| * per the rule configuration. This function centralizes all supported labelling | ||
| * strategies so the rule stays small and testable. | ||
| * | ||
| * The supported strategies (gated by `config` flags) are: | ||
| * 1) A parent `<Field>`-like wrapper that provides the label context (`allowFieldParent`). | ||
| * 2) A non-empty inline prop such as `aria-label` or `title` (`labelProps`). | ||
| * 3) Being wrapped by a `<label>` element (`allowWrappingLabel`). | ||
| * 4) Associated `<label for="...">` / `htmlFor` relation (`allowFor`). | ||
| * 5) `aria-labelledby` association to an element with textual content (`allowLabelledBy`). | ||
| * | ||
| * Note: This does not validate contrast or UX; it only checks the existence of | ||
| * an accessible **name** via common HTML/ARIA labelling patterns. | ||
| * | ||
| * @param node - The JSX opening element we’re inspecting (e.g., `<Input ...>` opening node). | ||
| * @param context - ESLint rule context or tree-walker context used by helper functions to | ||
| * resolve scope/ancestors and collect referenced nodes. | ||
| * @param config - Rule configuration describing which components/props/associations count as labelled. | ||
| * Expected shape: | ||
| * - `component: string | RegExp` — component tag name or regex to match. | ||
| * - `labelProps: string[]` — prop names that, when non-empty, count as labels (e.g., `["aria-label","title"]`). | ||
| * - `allowFieldParent?: boolean` — if true, a recognized parent “Field” wrapper satisfies labelling. | ||
| * - `allowWrappingLabel?: boolean` — if true, being inside a `<label>` satisfies labelling. | ||
| * - `allowFor?: boolean` — if true, `<label htmlFor>` association is considered. | ||
| * - `allowLabelledBy?: boolean` — if true, `aria-labelledby` association is considered. | ||
| * @returns `true` if any configured labelling strategy succeeds; otherwise `false`. | ||
| */ | ||
| export function hasAccessibleLabel(node: TSESTree.JSXOpeningElement, context: any, config: LabeledControlConfig): boolean { | ||
| if (config.allowFieldParent && hasFieldParent(context)) return true; | ||
| if (config.labelProps.some(p => hasNonEmptyProp(node.attributes, p))) return true; | ||
| if (config.allowWrappingLabel && isInsideLabelTag(context)) return true; | ||
| if (config.allowFor && hasAssociatedLabelViaHtmlFor(node, context)) return true; | ||
| if (config.allowLabelledBy && hasAssociatedLabelViaAriaLabelledBy(node, context)) return true; | ||
| return false; | ||
| } | ||
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| /** | ||
| * Factory for a minimal, strongly-configurable ESLint rule that enforces | ||
| * accessible labelling on a specific JSX element/component. | ||
| * | ||
| * The rule: | ||
| * • Matches opening elements by `config.component` (exact name or RegExp). | ||
| * • Uses `hasAccessibleLabel` to decide whether the element is labelled. | ||
| * • Reports with `messageId` if no labelling strategy succeeds. | ||
| * | ||
| * Example: | ||
| * ```ts | ||
| * export default makeLabeledControlRule( | ||
| * { | ||
| * component: /^(?:input|textarea|Select|ComboBox)$/i, | ||
| * labelProps: ["aria-label", "aria-labelledby", "title"], | ||
| * allowFieldParent: true, | ||
| * allowWrappingLabel: true, | ||
| * allowFor: true, | ||
| * allowLabelledBy: true, | ||
| * }, | ||
| * "missingLabel", | ||
| * "Provide an accessible label (e.g., via <label>, htmlFor, aria-label, or aria-labelledby)." | ||
| * ); | ||
| * ``` | ||
| * | ||
| * @param config - See `hasAccessibleLabel` for the configuration fields and semantics. | ||
| * @param messageId - The message key used in `meta.messages` (e.g., "missingLabel"). | ||
| * @param description - Human-readable rule description and the text displayed for `messageId`. | ||
| * @returns An ESLint `RuleModule` that reports when the configured component lacks an accessible label. | ||
| */ | ||
| export function makeLabeledControlRule( | ||
| config: LabeledControlConfig, | ||
| messageId: string, | ||
| description: string | ||
| ): TSESLint.RuleModule<string, []> { | ||
| return { | ||
| meta: { | ||
| type: "problem" as const, | ||
| messages: { [messageId]: description }, | ||
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| docs: { | ||
| description, | ||
| recommended: "strict" as const, // not `true` | ||
| url: "https://www.w3.org/TR/html-aria/" | ||
| }, | ||
| schema: [] | ||
| }, | ||
| defaultOptions: [] as const, | ||
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| create(context: TSESLint.RuleContext<string, []>) { | ||
| return { | ||
| JSXOpeningElement(node: TSESTree.JSXOpeningElement) { | ||
| // elementType expects an ESTree JSX node — cast is fine | ||
| const name = elementType(node as unknown as JSXOpeningElement); | ||
| const matches = typeof config.component === "string" ? name === config.component : config.component.test(name); | ||
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| if (!matches) return; | ||
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| if (!hasAccessibleLabel(node, context, config)) { | ||
| context.report({ node, messageId }); | ||
| } | ||
| } | ||
| }; | ||
| } | ||
| }; | ||
| } | ||
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nit: for readability, consider moving
messageIdanddescriptionto required properties in theLabeledControlConfiginstead of just passing as params here