Autocomplete has valid value 73f2c2

_rules/autocomplete-valid-value-73f2c2.md

@@ -23,12 +23,13 @@ acknowledgments:
 
 This rule applies to any HTML `input`, `select` and `textarea` element with an `autocomplete` [attribute value][] that is neither empty (`""`) nor only [ASCII whitespace][], except if one of the following is true:
 
-- **hidden**: the element is not [visible][], and not [included in the accessibility tree][]; or
+- **toggle**: the `autocomplete` attribute consists of a single token that is [ASCII case-insensitive][] match for string `off` or string `on`; or
 - **disabled**: the element is a [disabled element]; or
-- **fixed value**: the element is an `input` element with a `type` [attribute value][] of either `hidden`, `button`, `submit` or `reset`; or
+- **fixed value**: the element is an `input` element with a `type` [attribute value][] of `hidden`, `button`, `submit` or `reset`; or
+- **hidden**: the element is not [visible][], and not [included in the accessibility tree][]; or
 - **static**: the element is not part of [sequential focus navigation][] and has a [semantic role][] that is not a [widget role][].
 
-## Expectation 1
+## Expectation
 
 Each test target's `autocomplete` [attribute value][] is a [space separated][] list of one or more tokens that follow the [HTML specification for Autofill detail tokens][], which requires that the token list match the following in the correct order:
 
@@ -37,19 +38,15 @@ Each test target's `autocomplete` [attribute value][] is a [space separated][] l
 3. An optional token of either "home", "work", "mobile", "fax" or "pager", only if the last token is "email", "impp", "tel" or "tel-\*"; then
 4. A required token from the [correct autocomplete field][].
 
-## Expectation 2
-
-Each test target's `autocomplete` [attribute value][] has a [correct autocomplete field][] that is [appropriate][appropriate field for the form control] for that test target.
-
 ## Assumptions
 
 The `autocomplete` attribute is used on form fields that correspond to [Input Purposes for User Interface Components](https://www.w3.org/TR/WCAG21/#input-purposes) and collect information about the user.
 
 If the `autocomplete` attribute is used to describe "custom" taxonomy, for example `<input type="text" autocomplete="banner" />`, success Criterion [1.3.5 Identify Input Purpose][sc135] may be satisfied even if this rule failed.
 
-The `type` attribute is used correctly according to the intended purpose of `input` elements. If an incorrect `type` attribute is used for `input` elements, this rule may fail elements that satisfy success Criterion [1.3.5 Identify Input Purpose][sc135]. For example if an `input` element has a `type` of `number`, but is expecting an e-mail address.
+The `aria-disabled` state is used on `input` elements which are not part of [sequential focus navigation][] and are not otherwise [operable](https://www.w3.org/TR/wai-aria-1.2/#dfn-operable). If this is not the case, this rule may be inapplicable on elements that are still operable and require a valid `autocomplete` attribute to satisfy success criterion [1.3.5 Identify Input Purpose][sc135].
 
-The `aria-disabled` state is used on `input` elements which are not part of [sequential focus navigation][] and are not otherwise [operable](https://www.w3.org/TR/wai-aria-1.2/#dfn-operable). If this is not the case, this rule may be inapplicable on elements that are still [operable](https://www.w3.org/TR/wai-aria-1.2/#dfn-operable) and require a valid `autocomplete` attribute to satisfy success Criterion [1.3.5 Identify Input Purpose][sc135].
+The purpose of a control is programmatically identifiable even when its `autocomplete` [attribute value][] is not an [appropriate field name for the form control][].
 
 ## Accessibility Support
 
@@ -62,6 +59,8 @@ The `aria-disabled` state is used on `input` elements which are not part of [seq
 
 The intent of this rule is to ensure that the `autocomplete` attribute can be used to support personalization. Many users may find it easier to fill out forms if those can be styled or laid out in a way that is familiar to them. Assistive technologies can do this when a form control is marked up in such a way that its purpose can be understood. For instance, assistive technologies could add familiar icons and colors to different fields, making it easier for the user to understand what the form does.
 
+Many browsers provide auto-filling suggestions even when the control's `type` [attribute value][] is not [appropriate][appropriate field name for the form control] for its `autocomplete` [attribute value][]. The same happens when the `autocomplete` property is queried. However, the `autocomplete` property is not programmatically identifiable if the requirements for the optional tokens are not met.
+
 The auto-completing feature of the `autocomplete` attribute benefits many users, but it is not required to satisfy success Criterion [1.3.5 Identify Input Purpose][sc135]. Setting `autocomplete="off"` on the element's [form owner](https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#form-owner) prevents the user agent from completing it, but it does not prevent the `autocomplete` [attribute value][] from being programmatically identifiable.
 
 - [Understanding Success Criterion 1.3.5: Identify Input Purpose](https://www.w3.org/WAI/WCAG21/Understanding/identify-input-purpose.html)
@@ -74,15 +73,15 @@ The auto-completing feature of the `autocomplete` attribute benefits many users,
 
 #### Passed Example 1
 
-This `autocomplete` [attribute value][] only has the required token, and is valid for an `input` element which has a default type of `text`.
+This `autocomplete` [attribute value][] only has the required token "username".
 
 ```html
 <label>Username<input autocomplete="username"/></label>
 ```
 
 #### Passed Example 2
 
-This `autocomplete` [attribute value][] only has the required token, and is valid for a `select` element. Even though the element's [form owner](https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#form-owner) has `autocomplete="off"`, thus preventing the user agent from completing it, it does not prevent the `autocomplete` [attribute value][] from being programmatically identifiable.
+The `autocomplete` [attribute value][] of this `select` element has the required token "bday-month". Even though the element's [form owner](https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#form-owner) has `autocomplete="off"`. This prevents the user agent from completing it, but does not prevent the `autocomplete` [attribute value][] from being programmatically identifiable.
 
 ```html
 <form autocomplete="off">
@@ -98,23 +97,23 @@ This `autocomplete` [attribute value][] only has the required token, and is vali
 
 #### Passed Example 3
 
-This `autocomplete` [attribute value][] only has the required token, and is valid for a `textarea` element. Mixing upper and lower case letters is allowed for `autocomplete` attributes.
+This `autocomplete` [attribute value][] only has the required token "street-address". Mixing upper and lower case letters is allowed for `autocomplete` attributes.
 
 ```html
 <label> Street address<textarea autocomplete="Street-Address"></textarea></label>
 ```
 
 #### Passed Example 4
 
-This `autocomplete` [attribute value][] list includes a `work` token, allowed because it is used before `email`. The `email` token is allowed on `input` elements with a `type` [attribute value][] of `text`.
+This `autocomplete` [attribute value][] list includes a `work` token, allowed because it is used before `email`.
 
 ```html
 <label>Work email<input autocomplete="Work Email"/></label>
 ```
 
 #### Passed Example 5
 
-This `autocomplete` [attribute value][] list includes a `section-` token, which can preface any [correct autocomplete field][]. The `email` token is allowed on `input` elements with a `type` [attribute value][] of `text`.
+This `autocomplete` [attribute value][] list includes a `section-` token, which can preface any [correct autocomplete field][].
 
 ```html
 <label>Partner's email address<input autocomplete="section-partner email"/></label>
@@ -130,12 +129,20 @@ This `autocomplete` [attribute value][] list includes `section-` and `billing` t
 
 #### Passed Example 7
 
-This `autocomplete` [attribute value][] list includes all allowed types of tokens in the correct order. The `email` token is allowed on `input` elements with a `type` [attribute value][] of `text`.
+This `autocomplete` [attribute value][] list includes all allowed types of tokens in the correct order.
 
 ```html
 <label>Office email<input type="text" autocomplete="section-primary shipping work email"/></label>
 ```
 
+#### Passed Example 8
+
+This `autocomplete` [attribute value][] only has the required token "bday-day". It remains programmatically identifiable even though it is inappropriate for the control's `type` [attribute value][] "tel".
+
+```html
+<label>Birthday day<input name="bdayday" type="tel" autocomplete="bday-day"/></label>
+```
+
 ### Failed
 
 #### Failed Example 1
@@ -148,7 +155,7 @@ This `autocomplete` [attribute value][] has an unknown term that is not a [corre
 
 #### Failed Example 2
 
-This `autocomplete` [attribute value][] has the `work` token on a [correct autocomplete field][], however `work` can not be used with `photo`.
+This `autocomplete` [attribute value][] has the `work` token which is a [correct autocomplete field][]. However, `work` can not be used with `photo`.
 
 ```html
 <label>Photo<input autocomplete="work photo"/></label>
@@ -190,71 +197,64 @@ The `autocomplete` attribute value is on an `input` element that does not have a
 
 #### Inapplicable Example 1
 
-This `button` element does not support `autocomplete` attributes.
-
-```html
-<button autocomplete="username"></button>
-```
-
-#### Inapplicable Example 2
-
 This `autocomplete` [attribute value][] is empty ("").
 
 ```html
 <label>Username<input autocomplete=""/></label>
 ```
 
-#### Inapplicable Example 3
+#### Inapplicable Example 2
 
 This `autocomplete` [attribute value][] contains only [ASCII whitespace][].
 
 ```html
 <label>Username<input autocomplete=" "/></label>
 ```
 
-#### Inapplicable Example 4
+#### Inapplicable Example 3
 
 This `autocomplete` [attribute value][] is on an element that is not [visible][] through `display:none`.
 
 ```html
 <label>Username<input autocomplete="username" style="display:none"/></label>
 ```
 
-#### Inapplicable Example 5
-
-This `autocomplete` attribute is on an `input` element with a `type` [attribute value][] that does not support autocomplete.
-
-```html
-<label>Username<input type="button" autocomplete="username"/></label>
-```
-
-#### Inapplicable Example 6
+#### Inapplicable Example 4
 
 This `autocomplete` attribute is on an `input` element that has the `disabled` attribute.
 
 ```html
 <label>Username<input autocomplete="username" disabled/></label>
 ```
 
-#### Inapplicable Example 7
+#### Inapplicable Example 5
 
 This `autocomplete` attribute is on an `input` element that has the `aria-disabled` [attribute value][] of `true`.
 
 ```html
 <label>Username<input autocomplete="username" aria-disabled="true"/></label>
 ```
 
-#### Inapplicable Example 8
+#### Inapplicable Example 6
 
 This `autocomplete` attribute is ignored because it is on an element with a [semantic role][] of `none`. The `disabled` attribute is required to ensure [presentational roles conflict resolution][] does not cause the `none` role to be ignored.
 
 ```html
 <label>Username<input type="text" role="none" disabled autocomplete="username"/></label>
 ```
 
+#### Inapplicable Example 7
+
+This `autocomplete` attribute is inapplicable because it has the `off` value.
+
+```html
+<label>Friend's first name<input type="text" autocomplete="off"/></label>
+```
+
 [ascii whitespace]: https://infra.spec.whatwg.org/#ascii-whitespace 'HTML ASCII whitespace 2020/08/12'
+[ascii case-insensitive]: https://infra.spec.whatwg.org/#ascii-case-insensitive 'definition of ASCII case-insensitive'
 [attribute value]: #attribute-value 'Definition of Attribute Value'
-[appropriate field for the form control]: #appropriate-field-for-the-form-control 'Definition of Appropriate field for the form control'
+[appropriate field name for the form control]: #appropriate-field-for-the-form-control 'Definition of Appropriate field for the form control'
 [correct autocomplete field]: #correct-autocomplete-field 'Definition of Correct autocomplete field'
 [disabled element]: #disabled-element 'Definition of Disabled Element'
 [html specification for autofill detail tokens]: https://html.spec.whatwg.org/#autofill-detail-tokens 'HTML Autofill Detail, 2020/08/12'