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109 lines
3.6 KiB
109 lines
3.6 KiB
# control-has-associated-label |
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Enforce that a control (an interactive element) has a text label. |
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There are two supported ways to supply a control with a text label: |
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- Provide text content inside the element. |
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- Use the `aria-label` attribute on the element, with a text value. |
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- Use the `aria-labelledby` attribute on the element, and point the IDREF value to an element with an accessible label. |
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- Alternatively, with an `img` tag, you may use the `alt` attribute to supply a text description of the image. |
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The rule is permissive in the sense that it will assume that expressions will eventually provide a label. So an element like this will pass. |
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```jsx |
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<button type="button">{maybeSomethingThatContainsALabel}</button> |
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``` |
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## How do I resolve this error? |
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### Case: I have a simple button that requires a label. |
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Provide text content in the `button` element. |
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```jsx |
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<button type="button">Save</button> |
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``` |
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### Case: I have an icon button and I don't want visible text. |
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Use the `aria-label` attribute and provide the text label as the value. |
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```jsx |
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<button type="button" aria-label="Save" class="icon-save" /> |
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``` |
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### Case: The label for my element is already located on the page and I don't want to repeat the text in my source code. |
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Use the `aria-labelledby` attribute and point the IDREF value to an element with an accessible label. |
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```jsx |
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<div id="js_1">Comment</div> |
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<textarea aria-labelledby="js_1"></textarea> |
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``` |
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### Case: My label and input components are custom components, but I still want to require that they have an accessible text label. |
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You can configure the rule to be aware of your custom components. Refer to the Rule Details below. |
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```jsx |
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<CustomInput label="Surname" type="text" value={value} /> |
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``` |
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## Rule details |
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This rule takes one optional object argument of type object: |
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```json |
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{ |
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"rules": { |
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"jsx-a11y/control-has-associated-label": [ 2, { |
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"labelAttributes": ["label"], |
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"controlComponents": ["CustomComponent"], |
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"ignoreElements": [ |
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"audio", |
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"canvas", |
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"embed", |
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"input", |
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"textarea", |
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"tr", |
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"video", |
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], |
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"ignoreRoles": [ |
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"grid", |
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"listbox", |
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"menu", |
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"menubar", |
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"radiogroup", |
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"row", |
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"tablist", |
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"toolbar", |
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"tree", |
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"treegrid", |
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], |
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"depth": 3, |
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}], |
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} |
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} |
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``` |
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- `labelAttributes` is a list of attributes to check on the control component and its children for a label. Use this if you have a custom component that uses a string passed on a prop to render an HTML `label`, for example. |
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- `controlComponents` is a list of custom React Components names that will render down to an interactive element. |
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- `ignoreElements` is an array of elements that should not be considered control (interactive) elements and therefore they do not require a text label. |
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- `ignoreRoles` is an array of ARIA roles that should not be considered control (interactive) roles and therefore they do not require a text label. |
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- `depth` (default 2, max 25) is an integer that determines how deep within a `JSXElement` the rule should look for text content or an element with a label to determine if the interactive element will have an accessible label. |
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### Succeed |
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```jsx |
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<button type="button" aria-label="Save" class="icon-save" /> |
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``` |
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### Fail |
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```jsx |
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<button type="button" class="icon-save" /> |
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``` |
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## Accessibility guidelines |
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- [WCAG 1.3.1](https://www.w3.org/WAI/WCAG21/Understanding/info-and-relationships) |
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- [WCAG 3.3.2](https://www.w3.org/WAI/WCAG21/Understanding/labels-or-instructions) |
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- [WCAG 4.1.2](https://www.w3.org/WAI/WCAG21/Understanding/name-role-value)
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