ARIA stands for [Accessible Rich Internet Applications][1] and is designed to improve the accessibility of Rich Internet Applications, i.e. to make them more usable for people with disabilities.

Help on the various attributes is available [here][2].

I don&#39;t think you can create your own ARIA attributes.


  [1]: http://www.w3.org/WAI/PF/aria/
  [2]: http://dev.w3.org/html5/markup/aria/aria.html

I am programatically adding custom views to a vertical LinearLayout, and I would like there to be some space between the views.  I have tried adding: setPadding(0, 1, 0, 1) to my CustomView constructor, but this doesn&#39;t seem to have any effect.  Any advice?

*It was pointed out that I should use margins.  Since I am dynamically adding views, I need to set the margins from code (not in xml).  I believe the way to do this is below, but it isn&#39;t working.

    public class MyView extends View
    {
    	public MyView (Context context)
    	{
    		super(context);
    		
            MarginLayoutParams params = new MarginLayoutParams(LayoutParams.WRAP_CONTENT,  LayoutParams.WRAP_CONTENT);
    		params.setMargins(0, 10, 0, 10);
    		setLayoutParams(params);

*Edit.  I also tried using MarginLayoutParams as a parameter while adding the views to the Linear layout (as below).  This also did not work:


    MarginLayoutParams params = new MarginLayoutParams(linearLayout.getLayoutParams());
    linearLayout.setMargins(0, 10, 0, 10);
    linearLayout.addView(view, params);




How to make space between LinearLayout children?

I&#39;m having issues with redrawing the figure here. I allow the user to specify the units in the time scale (x-axis) and then I recalculate and call this function `plots()`. I want the plot to simply update, not append another plot to the figure.

    def plots():
        global vlgaBuffSorted
        cntr()
    
        result = collections.defaultdict(list)
        for d in vlgaBuffSorted:
            result[d[&#39;event&#39;]].append(d)
    
        result_list = result.values()
        
        f = Figure()
        graph1 = f.add_subplot(211)
        graph2 = f.add_subplot(212,sharex=graph1)
    
        for item in result_list:
            tL = []
            vgsL = []
            vdsL = []
            isubL = []
            for dict in item:
                tL.append(dict[&#39;time&#39;])
                vgsL.append(dict[&#39;vgs&#39;])
                vdsL.append(dict[&#39;vds&#39;])
                isubL.append(dict[&#39;isub&#39;])
            graph1.plot(tL,vdsL,&#39;bo&#39;,label=&#39;a&#39;)
            graph1.plot(tL,vgsL,&#39;rp&#39;,label=&#39;b&#39;)
            graph2.plot(tL,isubL,&#39;b-&#39;,label=&#39;c&#39;)
    
        plotCanvas = FigureCanvasTkAgg(f, pltFrame)
        toolbar = NavigationToolbar2TkAgg(plotCanvas, pltFrame)
        toolbar.pack(side=BOTTOM)
        plotCanvas.get_tk_widget().pack(side=TOP)

How to update a plot in matplotlib

I wanted to know what the `aria-*` attributes are used for. What values can they have, and are they defined values or can I create my own values?

Can someone explain the HTML5 aria-* attribute?

<p>I wanted to know what the <code>aria-*</code> attributes are used for. What values can they have, and are they defined values or can I create my own values?</p>


I am attempting to share data across subdomains using Safari. I would like to use an HTML5 database (specifically _localStorage_ as my data is nothing but key-value pairs). However, it seems as though data stored to __domain.com__ can not be accessed from __sub.domain.com__ (or vice versa). Is there any way to share a single database in this situation?

Can HTML5 databases and localStorage be shared across subdomains?

I am using `:after` and `:before` CSS pseudo elements and it is working fine in **Internet Explorer 8**, and all modern browsers but it is not working fine in **Internet Explorer 7**. Are there known hacks to work around this in **Internet Explorer 7**?

:after and :before CSS pseudo elements hack for Internet Explorer 7

What should I use?

    &lt;span style=&quot;color:red&quot;&gt;test&lt;/span&gt;
or

    &lt;font color=&quot;red&quot;&gt;test&lt;/font&gt;

and why?

HTML/CSS font color vs span style

A lot of people still use tables to layout controls, data etc. - one example of this is the popular jqGrid. However, there is some magic happening that I cant seem to fathom (its tables for crying out loud, how much magic could there possibly be?)

How is it possible to set a table&#39;s column width and have it obeyed like jqGrid does!? If I try to replicate this, even if I set every `&lt;td style=&#39;width: 20px&#39;&gt;`, as soon as the content of one of those cells is greater than 20px, the cell expands!

Any ideas or insights?

Fixed Table Cell Width

Given an arbitrary HTML element with zero or more `data-*` attributes, how can one retrieve a list of key-value pairs for the data.

E.g. given this:

    &lt;div id=&#39;prod&#39; data-id=&#39;10&#39; data-cat=&#39;toy&#39; data-cid=&#39;42&#39;&gt;blah&lt;/div&gt;

I would like to be able to programmatically retrieve this:

    { &quot;id&quot;:10, &quot;cat&quot;:&quot;toy&quot;, &quot;cid&quot;:42 }

Using jQuery (v1.4.3), accessing the individual bits of data using `$.data()` is simple if the keys are known in advance, but it is not obvious how one can do so with arbitrary sets of data.

I&#39;m looking for a &#39;simple&#39; jQuery solution if one exists, but would not mind a lower level approach otherwise. I had a go at trying to to parse `$(&#39;#prod&#39;).attributes` but my lack of javascript-fu is letting me down.


## update

[customdata] does what I need. However, including a jQuery plugin just for a fraction of its functionality seemed like an overkill. 

Eyeballing the source helped me fix my own code (and improved my javascript-fu).

Here&#39;s the solution I came up with:

    function getDataAttributes(node) {
        var d = {}, 
            re_dataAttr = /^data\-(.+)$/;

        $.each(node.get(0).attributes, function(index, attr) {
            if (re_dataAttr.test(attr.nodeName)) {
                var key = attr.nodeName.match(re_dataAttr)[1];
                d[key] = attr.nodeValue;
            }
        });

        return d;
    }

## update 2

As demonstrated in the accepted answer, the solution is trivial with jQuery (&gt;=1.4.4). `$(&#39;#prod&#39;).data()` would return the required data dict.

   [customdata]: https://github.com/ubilabs/jquery-customdata



Get list of data-* attributes using javascript / jQuery

**Overview**

HTML5 [now allows][1] `&lt;svg&gt;` and `&lt;math&gt;` markup with an HTML document without depending on external namespaces (decent overview [here][2]). Both have their own `alt`-attribute analogs (see below) which are effectively ignored by today&#39;s screen-reader software. Thus, these elements are inaccessible to blind users.

**Are there plans to implement a standard alt-text convention for these new elements?** I&#39;ve scoured the docs and have come up dry!

**Futher Details**

*Regarding SVG:* an SVG&#39;s alternate text could be considered the contents of the root `title` or `desc` tag.
    
    &lt;svg&gt;
      &lt;title&gt;An image title&lt;/title&gt;
      &lt;desc&gt;This is the longer image description&lt;/desc&gt;
      ...
    &lt;/svg&gt;

I&#39;ve found [one][3] screen-reader which reads it as such, but is this standard? [Previous methods][4] of inserting SVG also had accessibility issues since `&lt;object&gt;` tags are treatedly inconsistently by screen-readers.

*Regarding MathML:* MathML&#39;s alternate text should be stored in the [`alttext` attribute][5].

    &lt;math alttext=&quot;A squared plus B squared equals C squared&quot;&gt;
      ...
    &lt;/math&gt;

Since screen readers do not seem to acknowledge this, the math-rendering library [MathJax][6] inserts text into an `aria-label` attribute at run-time.

    &lt;span aria-label=&quot;[alttext contents]&quot;&gt;...&lt;/span&gt;

Unfortunately NVDA, JAWS, and others do not reliably read these labels yet either. (More on [WAI-ARIA][7])

*Regarding both:* lacking success with the largely-unsupported ARIA attributes, I tried using `title` attributes. These also seem to be ignored on these &quot;foreign&quot; HTML elements.

**Wrap-Up**

More than a quick hack, I&#39;m looking for the *recommended way* to place alternate-text on these new HTML elements. Perhaps there is a W3C spec I&#39;m overlooking? Or is it still just too early in the game?


  [1]: http://dev.w3.org/html5/markup/syntax.html#svg-mathml
  [2]: http://www.sanbeiji.com/archives/1243
  [3]: http://www.screenreader.net/
  [4]: http://www.carto.net/papers/svg/samples/svg_html.shtml
  [5]: http://www.daisy.org/z3986/structure/SG-DAISY3/part2-math.html#math_examp1e1
  [6]: http://www.mathjax.org/
  [7]: http://www.w3.org/TR/wai-aria/

Accessibility: recommended alt-text convention for SVG and MathML?

`input type=&quot;submit&quot;` and `button` tag are they interchangeable? or if there is any difference then When to use `input type=&quot;submit&quot;` and when `button` ?

And if there is no difference then why we have 2 tags for same purpose?

input type=&quot;submit&quot; Vs button tag are they interchangeable?

I&#39;ve been investigating a few of the JavaScript frameworks such as Backbone.js and Batman.js for a while and whilst I really like them, I have one niggling thing that I keep coming back to. That issue is accessibility.

As a web developer I&#39;ve always tried to make my websites and applications with accessibility in mind, especially using the idea of progressive enhancement.

Clearly out of the box these new JS frameworks don&#39;t gracefully degrade, so I was wondering what are other developers thoughts on this issue and what are you doing about it.  After all the accessibility of a website / app isn&#39;t really an optional thing as it&#39;s part of the law in many countries.

Maybe I&#39;m just being overly zealous on this subject, and not appreciating how far things have come in terms of accessibility.

Accessibility and all these JavaScript frameworks

I am trying to add accessibility features to an iOS app that has already been developed. 

There are a couple of UI features (e.g. buttons) that I like them to show up if the VoiceOver option in the accessibility menu of the iPhone settings is on and do not show up if the voiceover is off. 

Is there a way to check whether the voiceover option is on or not?

iOS Voiceover status

Consider the following:

    &lt;label&gt;Range from 
        &lt;input name=&#39;min_value&#39;/&gt; to
        &lt;input name=&#39;max_value&#39; /&gt;
    &lt;/label&gt;

Is this semantically correct since the W3C recommendations state that a label is associated with **exactly** one form control?

Clicking into the second input shifts focus immediately to the first input? Can this be prevented?

How would one markup a min/max input combination to show that two inputs belong together?

Two input fields inside one label

Many ARIA demonstration websites use code such as:

    &lt;label for=&quot;name&quot; id=&quot;label-name&quot;&gt;Your Name&lt;/label&gt;
    &lt;input id=&quot;name&quot; aria-labelledby=&quot;label-name&quot; type=&quot;text&quot;&gt;

&lt;br&gt;
But what&#39;s the purpose of using &lt;code&gt;aria-labelledby&lt;/code&gt; attribute in this case? The &lt;code&gt;input&lt;/code&gt; element has already been labeled by the &lt;code&gt;label&lt;/code&gt; element which is using &lt;code&gt;for&lt;/code&gt; attribute, isn&#39;t it?

The purpose of using &quot;aria-labelledby&quot; on already labeled input elements?

Using Bootstrap modal, I&#39;ve seen these `aria` attributes a lot, but I never knew how to make use of them. 

Does anyone know what cases to use these attributes? I googled—just didn&#39;t find any straightforward answers.

What are these attributes: `aria-labelledby` and `aria-hidden`

Can somebody please elaborate on the difference between `aria-live=&quot;assertive&quot;` and `aria-live=&quot;polite&quot;`?

As per my understanding `aria-live=&quot;assertive&quot;` will get the higher priority and wipe off the queue, whereas `aria-live=&quot;polite&quot;` is having low priority over `aria-live=&quot;assertive&quot;` and will continue with queue.

Difference between aria-live=&quot;assertive&quot; and aria-live=&quot;polite&quot;

I am used to use `title=&quot;&quot;` attribute on my links/buttons/... to detail them. But bootstrap uses lots of `aria-label=&quot;&quot;` attributes, for accessibility reasons as far as I understood.

So I come up to create buttons like:

    &lt;button
        id=&quot;show-raw-result&quot;
        class=&quot;btn btn-default btn-sm btn-twigfiddle&quot;
        title=&quot;Result was not easily readable so it has been automatically cleaned up, use this button to see the result raw&quot;
        aria-label=&quot;Result was not easily readable so it has been automatically cleaned up, use this button to see the result raw&quot;&gt;
        &lt;span class=&quot;glyphicon glyphicon-asterisk&quot;&gt;&lt;/span&gt; Show raw result
    &lt;/button&gt;

But copying/pasting the title to create an aria-label looks just ugly. Which one should I choose, and why?


What is the difference between aria-label and title attributes?

I have been seeing the aria attribute all over while working with Angular Material. Can someone explain to me, what the aria prefix means? but most importantly what I&#39;m trying to understand is the difference between `aria-hidden` and `hidden` attribute.

Content Type	Original Author	Original Content on Stackoverflow
Question	soflow	View Question on Stackoverflow
Solution 1 - Html	gkrogers	View Answer on Stackoverflow

Can someone explain the HTML5 aria-* attribute?

Html Problem Overview

Html Solutions

Solution 1 - Html

How to update a plot in matplotlib

How to make space between LinearLayout children?

Attributions