I read from this site [Site]: http://msdn.microsoft.com/en-us/library/windows/apps/hh968006.aspx
that aria-multiline is to provide the multi line attribute.
But when i applied to textbox, it doesn't seem to work. Can anyone please tell why. I have one more question, can anyone please tell me the difference between these two elements
<textarea rows="4" cols="50" id="text"></textarea>
<textarea rows="4" cols="50" aria-labelledby="aria-text-label" id="aria-text" role="textbox" aria-multiline="true"></textarea>
Thanks
ARIA attributes are declarative (informative). They inform browsers and especially assistive software what functional properties elements have, mainly due to JavaScript code that processes them, instead of making elements have functional properties. For example, if you used JavaScript to make a div element a multi-line input area, it would be appropriate to set aria-multiline="true" on that element. See the W3C WAI Primer.
Thus, the attribute is redundant for textarea (browsers can be expected to know what that element is). For input type="text" it could be used, but only if you have somehow managed to turn it to a multiline control.
The differences between the two elements presented in the question are:
They assign different id attribute values.
The latter declares a role attribute, which matches the default semantics and is not recommended in Using WAI-ARIA in HTML. (It is allowed, but it may confuse people who read the HTML source and mislead them into thinking that it has some effect.)
It also redundantly declares the element as multiline.
It additionally specifies that the element has a label, which is an element with id="aria-text-label". This is not redundant, but it is normally better, more accessible, to have the label declared in normal HTML markup, using the label element.
Have you read Remarks part of your link? Since textarea is multiline by default, so setting aria-multiline="true" will have no efect. This attribute sets what ENTER key do. In textarea and when aria-multiline="true" it will continue input to second row. But if you set aria-multiline="false" for textarea, it will act as <input type="text"/> - it will submit form on Enter key press and will not jump to second row.
Related
Hello any accessibility gurus,
I want to have this button element, when tabbed on, would trigger the screen read of an input element instead.
I tried pointing the aria-labelledby from the button to the input, to have the input's aria-label being read out. But the button still reads out its own description, when tabbed on.
<fieldset>
<input type="radio" id="inputid" aria-label="read me">
<button aria-labelledby="inputid">don't read me</button>
</fieldset>
Is there a way to read another element's content?
Thank you,
2022-12-06 Edit:
Following Andy's comment, the input element is only visually hidden, so it was moved offscreen with css left: -10000px.
I believe aria-labelledby is not used according to the standards, which might explain undefined behaviour.
The Accessible Name and Description, step C mentions the following:
If the embedded control has role textbox, return its value.
That means that if an <input>, which has implicit role textbox, is used as part of an accessible name, not its label, but its value is used as the name.
Further, the ARIA standard on aria-labelledby reads:
If the interface is such that it is not possible to have a visible label on the screen, authors SHOULD use aria-label […]
The main purpose of aria-labelleby is to refer to part of the visible contents of an element like a <form> to label it. Most commonly, this would be a heading like <h2>.
The use case of this question is currently unclear to me. The example provided does not make sense with a single radio input.
If the <input> is completely hidden, visually and from assistive technology, why is it there in the first place? <input type="hidden"> would be the more correct input to use if the form data is needed
If it’s only hidden visually, both the button and the input can be focussed, which is terribly confusing. Does the input appear on screen once it receives focus?
please , I need to know difference between area-placeholder and placeholder ? when area-placeholder will appear in input field
<input type="search" placeholder="Search" aria-placeholder="Search2" />
edit (added a deeper explanation)
ARIA labels are used to express semantics that HTML can't express on its own, i.e bridging areas with accessibility issues that can't be managed with native HTML. It works by allowing you to specify attributes that modify the way an element is translated into the accessibility tree.
for example, let's use a list item as a custom checkbox (the CSS class 'checkbox' gives the element the required visual characteristics.
<li tabindex="0" class="checkbox" checked>
Receive promotional offers
</li>
for sighted users, this will work fine, but a screen reader won't give an indication that this element is a checkbox, so users with low vision might miss this element.
using ARIA will give the element the missing information for the screen reader to properly interpret it.
there are many ARIA attributes, and if you plan on using them (you should!) i recommended reading more here
Aria-label allows us to specify a string to be used as the accessible label. This overrides any other native labeling mechanism, such as a label element — for example, if a button has both text content and an aria-label, only the aria-label value will be used.
A placeholder is a text that appears in the form control when it has no value set. The HTML placeholder attribute enables providing a sample value or a brief description of the expected format for several HTML types and .
If you are creating a textbox using any other element, the placeholder is not supported. That is where aria-placeholder comes into play. The aria-placeholder attribute can be used to define a short hint to help the user understand what type of data is expected when a non-semantic form control has no value.
<p id="date-of-birth">Birthday</span>
<div contenteditable role="textbox" aria-labelledby="date-of-birth"
aria-placeholder="MM-DD-YYYY">MM-DD-YYYY</div>
The placeholder hint should be shown to the user whenever the control's value is empty, including when a value is deleted.
The aria-placeholder is used , in addition, to, not instead of, a label. They have different purposes and different functionality. A label explains what kind of information is expected. Placeholder text provides a hint about the expected value.
ARIA is only modifying the accessibility tree for an element and therefore how assistive technology presents the content to your users. ARIA doesn't change anything about the function or behavior of an element. When not using semantic HTML elements for their intended purpose and default functionality, you must use JavaScript to manage behavior.
for a more detailed explanation, you can visit the aria-label page on Mozilla
Are there any differences between these two screen reader techniques on forms, and is one more encouraged than the other:
<label for="titleInput">Title</label>
<input type="text" id="titleInput" name="title" value="">
<div>Title</div>
<input type="text" aria-label="Title" name="title" value="">
The first way has always been the way to set this up, but since WAI-ARIA was introduced, it's got me thinking if using aria-label with forms is the better than using <label for="x">.
As a rule of thumb: If a real element can do the job, then use a real element. ARIA is what you fallback to when there is no real element that expresses the semantics or when you are doing something really weird which prevents you using the normal element.
(Most of the time, when you are doing something really weird, you should stop doing the weird thing instead).
In this particular case, there are a couple of major differences between the two.
Browsers won't extend the click target to the div element as they would with a label element. Clicking the label will focus the input, clicking the div will not.
You now have two labels. The div and the attribute provide the same information in two different places. The attribute doesn't replace the div, so a screen reader will read out the div text and the label associated with the input.
Use a <label>. It is specifically for associating text with a form control.
aria-label is designed for providing a text description of some content which a screen reader can't read out. e.g. when you are using a background image to convey information instead of using an <img> with an alt attribute (See my previous note about weirdness).
Aria-label is for accessibility. If Aria-label is added, on voice-over i.e (cmd +F5 on MAC or JAWS on windows machine will read whatever is typed inside the aria-label attribute of the HTML tag. This functionality is highly helpful for visually disabled users. Read here https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/ARIA_Techniques/Using_the_aria-label_attribute
Label is HTML tag , just like <form> or <h1>..<h6> , etc tags, when tag is used it renders Label on the UI. E.g: <Label>ENTER NAME</Label>
I have an HTML page that is way too junky, so I am trying to trim it down.
I always put type='text' on my inputs, when they are text inputs:
<input type="text" />
However, it doesn't seem that browsers strictly require that.
Is omitting this attribute where it is text considered bad practice?
The type attribute has always been optional, defaulting to text, in all HTML specifications (which start from HTML 2.0) and in all implementations. It is thus safe to omit it, and of course equally safe to include it, when you want to have a text input field.
In the DOM, <input> and <input type=text>, have the same representation (including the presence of a type property of the element node, with the value 'text'), except that only in the latter case the attributes property contains type. So any JavaScript processing that needs the type property works just the same.
It is a matter of opinion and taste whether it is useful to include it for symmetry with other input elements or for explicitness, so that a person reading HTML source will immediately see that we have a text input field, without needing to scan a possibly long list of attributes to see that no type attribute is present.
However, there is a technical difference that may matter, possibly making it advantageous to use the type=text attribute. In CSS, the selector input[type=text] matches only elements that have the attribute type=text explicitly set. If such attributes are used consistently, you can thus set styling properties for text input fields without affecting any other input fields. Otherwise you need a more complicated selector.
To answer to this question we can refer to:
HTML4 SPEC 17.4 The INPUT element
type =
text|password|checkbox|radio|submit|reset|file|hidden|image|button
[CI] This attribute specifies the type of control to create. The
default value for this attribute is "text".
The HTML5 Spec 4.10.5 The input element
The type attribute controls the data type (and associated control) of
the element. It is an enumerated attribute. The missing value default
is the Text state.
So, omitting the attribute is not considerable a bad practice
text is the default value for an input tag's type attribute in most if not all modern browsers. However, it isn't considered a "bad practice" to leave it off, only /good/ practice to include it.
If you are looking at modern browsers, they will surely handle it. But if your users are using older browsers (specially IE-older ones) then gods know what will happen. ;)
In-field labels are extremely popular now. They save space and look cool. There are many, many ways to accomplish them. It is now very easy to do using the HTML5 placeholder parameter for form inputs. You can even then create backwards compatibility with a bit of jquery if you want to.
But, is it semantically correct to use placeholder="Name" instead of <label>Name</label> or should a label element always be included and placeholder reserved to guide the user like this:
<label for="name">Name</label><input id="name" type="text" placeholder="Jane Doe">
If it's generally considered ok to use placeholder as either a label or an example, then that's definitely the easiest way to accomplish this effect. No javascript needed for modern browsers, no chance of submitting the label as the input value, etc. What are the semantic and practical drawbacks of doing this, if any?
The HTML5 specification explicitly calls this out. It says:
The placeholder attribute should not be used as a replacement for a
label. For a longer hint or other advisory text, place the text next
to the control.
Use of the placeholder attribute as a replacement for a label can
reduce the accessibility and usability of the control for a range of
users including older users and users with cognitive, mobility, fine
motor skill or vision impairments. While the hint given by the
control's label is shown at all times, the short hint given in the
placeholder attribute is only shown before the user enters a value.
Furthermore, placeholder text may be mistaken for a pre-filled value,
and as commonly implemented the default color of the placeholder text
provides insufficient contrast and the lack of a separate visible
label reduces the size of the hit region available for setting focus
on the control.
HTML5 spec notwithstanding, It's becoming popular to use the "Float Label Pattern". The label starts as a placeholder, but then moves up above the field once text has been entered.
There's a handy tutorial for it here....
http://webdesign.tutsplus.com/tutorials/ux-tutorials/implementing-the-float-label-form-pattern/