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110 lines
3.6 KiB
Markdown
110 lines
3.6 KiB
Markdown
# 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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