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[ARIA] What is Accessible Name Calculation?

What's in a name? In this lesson, I'll explain the concept of naming interactive elements for screen reader users, including forms, buttons, and links. You'll learn how to debug accessible names and descriptions using the Chrome Accessibility Develop…

[ARIA] Create an Accessible Tooltip on a Text Input

Here we use HTML and CSS to create a stylish yet semantic tooltip on a form input. I am using aria-describedby to create a relationship with the input and the tooltip. Then I use CSS to style the tooltip and control when it appears or disappears both…

[ARIA] Accessible modal dialogs

Learn how to create a modal dialog with accessible keyboard and screen reader mechanics using the native HTML5 dialog element and experimental inert attribute (with polyfills) and JavaScript focus management. We'll explore how to make a DIV or non-mo…

ARIA无障碍技术

ARIA Accessible Rich Internet Applications (ARIA) 规定了能够让 Web 内容和 Web 应用(特别是那些由 Ajax 和 JavaScript 开发的)对于残障人士更易使用的各种机制.例如,ARIA 提供了易用的导航地标.JavaScript 组件.表单提示以及错误信息.实时内容更新等.主要用来标识页面中涉及到动态交互的地方,这些交互通常是由js和相关技术来实现的,例如浮出层,对话框弹出,下拉列表以及伪元素等. ARIA 是一组特殊的易用性属性,…

HTML5+Bootstrap 学习笔记 3

HTML5 aria-* and role aria是指Accessible Rich Internet Application.role的作用是描述一个非标准的tag的实际作用,而aria-*的作用就是描述这个tag在可视化的情境中的具体信息.比如 <div role="checkbox" aria-checked="checked"></div> 什么是ARIA: WAI-ARIA指无障碍网页应用.主要针对的是视觉缺陷,失聪,行动不便的残…

ARIA(Accessible Rich Internet Application)

ARIA 为Web app提供满足用户不同需求的解决方案.建设起用户和软件之间的桥梁. 新的HTML5标准中增加 aria-* 的标签属性,全称Accessible Rich Internet Application.与role标签属性配合使用. role属性表示一个非标准的tag的实际作用.比如用div做button,那么设置div 的 role=“button”,辅助工具就可以认出这实际上是个button.而aria-*的作用就是描述这个tag在可视化的情境中的具体信息. 最简单的应用比如,…

[ARIA] Accessible animations with reduced motion

Animations can make people sick, or worse! By adding animation toggles and listening in to the user's system preference for reducing motion on OSX and iOS, we can give them more control over our interfaces. Animation can be a safety issue; let's do s…

[HTML5] Accessible Icon Buttons

Icon buttons are very common in web applications, yet they often have accessibility problems. Learn how to make your icon buttons accessible to keyboard and screen reader users with HTML, CSS, SVG and ARIA. <!DOCTYPE html> <html lang="en&quo…

web语义化之SEO和ARIA

在快速理解web语义化的时候,只知道web语义化有利于SEO和便于屏幕阅读器阅读,但并不知道它是如何有利于SEO和便于阅读器阅读的,带着这个疑问,进行了一番探索总结. SEO 什么是SEO? SEO(Search Engine Optimization,搜索引擎优化 ),是一种利用搜索引擎的搜索规则来提高目的网站在有关搜索引擎内的排名的方式.通俗来讲就是根据搜素引擎的规则来优化你的网站,让你的网站能够在用户的搜索结果中排在前面,提高网站的访问量. SEO常用方式 采用DIV+CSS布局 采用di…

[翻译]如何在HTML5中有效使用ARIA

ARIA是Accessible Rich Internet Application的简称,指无障碍富互联网应用.可以使一些有功能障碍(如听力,视力)的人群,使用你的网站.下面看一下做为开发人员的我们,如何让他们使用起来更容易. 使用ARIA的一种方式,是添加ARIA到我们的html中.你可能对在HTML中使用语义化元素很熟悉了,如nav,button,header.使用它们,可以很容易表达块的作用.这些元素可以更好地表达页面中内容的意思,我们可以把这些元素和ARIA组合使用.不过,在一起使用它们…

无障碍（Accessible Rich Internet Applications）

可访问性就是让你的网站能够尽可能为越来越多的人可用的做法,这意味着需要竭尽全力不要将任何访问信息的人挡在门外,仅仅因为他们可能有某些方面的残疾或者因为某些个人情况例如他们正在使用的设备.他们的网速.或者他们所处的地理位置或场所. Accessible Rich Internet Applications (ARIA) 规定了能够让 Web 内容和 Web 应用(特别是那些由 Ajax 和 JavaScript 开发的)对于残障人士更易使用的各种机制. 使用 Firefox 开发者工具 Acces…

OpenCASCADE Curve Length Calculation

OpenCASCADE Curve Length Calculation eryar@163.com Abstract. The natural parametric equations of a curve are parametric equations that represent the curve in terms of a coordinate-independent parameter, generally arc length s, instead of an arbitray…

The constructor BASE64Encoder() is not accessible due to restriction on required library

在Eclipse中编写Java代码时,用到了BASE64Decoder,import sun.misc.BASE64Decoder;可是Eclipse提示:Access restriction : The type BASE64Decoder is not accessible due to restriction on required library C:\Programfiles\java\jre6\lib\rt.jarAccess restriction : The constructo…

Access restriction: The type TaskTopicResolver is not accessible due to restrict

Access restriction: The type TaskTopicResolver is not accessible due to restrict :  Eclipse 默认把这些受访问限制的API设成了ERROR. Windows -> Preferences -> Java -> Compiler -> Errors/Warnings -> Deprecated and trstricted API -> Forbidden reference (ac…

Eclipse 关于“The type * is not accessible due to restriction on required library”问题的解决办法

The type * is not accessible due to restriction on required library”的错误, 意思是所需要的类库由于受限制无法访问. 解决办法: 1.选中项目->右键->进入Properties视图,选中Java Build Path->点击Libraries->展开JRE System Library[JavaSE-1.6],选中Access rules这一项.如图: 2.Edit->点击Add->在Rule Pat…

【转】Java出现No enclosing instance of type E is accessible. Must qualify the allocation with an enclosing

最近在看Java,在编译写书上一个例子时,由于书上的代码只有一部分,于是就自己补了一个内部类.结果编译时出现:No enclosing instance of type E is accessible. Must qualify the allocation with an enclosing instance of type E(e.g.  x.new A() where x is an instance of E). E指代我写的那个内部类. 根据提示,没有可访问的内部类E的实例,必须分配一…

hdu4965 Fast Matrix Calculation （矩阵快速幂 结合律

http://acm.hdu.edu.cn/showproblem.php?pid=4965 2014 Multi-University Training Contest 9 1006 Fast Matrix Calculation Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 238    Accepted Submission(…

Django WSGI Error:class.__dict__ not accessible in restricted mode

一.问题 今天网站出了一个错误: RuntimeError at /index.html class.__dict__ not accessible in restricted mode 二.原因 用了两次WSGIScriptAlias,类似于: WSGIScriptAlias /my_app /home/myuser/myapp/wsgi_scripts/deployment.wsgi WSGIScriptAlias /my_app_demo /home/myuser/myapp/wsgi_s…

译文 对无障碍网页应用（ARIA）的选择

//本文编辑格式为Markdown,译文同时发布在众成翻译 对无障碍网页应用(ARIA)的选择 让网站对每个人都能访问是一件相当艰难的工作,尤其是在我们使用自定义标记解决方案(custom markup solutions)的那些日子.我很高兴#a11y(可访问性的简称)的话题最近获得了越来越多的关注,因为#a11y没有什么好的,但是正如James Williamson今天发布的twitter: 我们对提高可访问性最大的误解是认为那是在帮别人,但是你错了,这是你的职责.(The biggest…

inconsistent line count calculation in projection snapshot

1.现象 在vs2013中,按Ctrl + E + D格式化.cshtml代码,vs2013系统崩溃.报:inconsistent line count calculation in projection snapshot. 因为习惯性格式化代码,一格式化.cshtml就崩溃,需要重启vs2013,弄得我也不开心.因此这个问题必须解决. 2.原因 百度查原因,相关链接如下: http://stackoverflow.com/questions/917392/how-should-i-fix-sv…

贪心 HDOJ 4726 Kia's Calculation

题目传送门 /* 这题交给队友做,做了一个多小时,全排列,RE数组越界,赛后发现读题读错了,囧! 贪心:先确定最高位的数字,然后用贪心的方法,越高位数字越大 注意:1. Both A and B will have same number of digits 两个数字位数相同 2. which is no larger than 10^6 不是大小,而是长度不超过1e6 */ #include <cstdio> #include <iostream> #include <al…

The constructor BASE64Encoder() is not accessible due to restriction on required

在Eclipse中编写Java代码时,用到了BASE64Decoder,import sun.misc.BASE64Decoder;可是Eclipse提示: Access restriction : The type BASE64Decoder is not accessible due to restriction on required library C:\Program files\java\jre6\lib\rt.jar Access restriction : The constru…

Calculation

定义一个Strategy接口,其中定义一个方法,用于计算 using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Calculation { interface Interface1 { int calculate(int a, int b); } } 定义具体的算法类,实现Strategy接口,算法类中的算法各自不同:加减乘等 1,加法类 using Syst…

WARNING: Calls to any function that may require a gradient calculation inside a conditional block may return undefined results

GLES2.0: Some device will give a warning on compling shaders(yet the compling will succeed), and the rendering result is incorrect with blink & artifacts. the problems is gradient calculation(interpolation) relies on the neighbor pixels, if the neigh…

VKP5 Price Calculation – List Variant & KZPBL (Delete site level)

List Variant: Configuration in Logistic General –> Retail Pricing –> Sales Price Calculation –> Define List Variant and -. The configuration is defining the list variant by defining the included fields and whether they can be changed in VKP5. Thi…

shiro错误No SecurityManager accessible to the calling code

Shire在Web.xml中shiroFilter的Mapping配置错误 org.apache.shiro.UnavailableSecurityManagerException: No SecurityManager accessible to the calling code, either bound to the org.apache.shiro.util.ThreadContext or as a vm static singleton.  This is an invalid ap…

hdu 2837 Calculation 指数循环节套路题

Calculation Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2272    Accepted Submission(s): 536 Problem Description Assume that f(0) = 1 and 0^0=1. f(n) = (n%10)^f(n/10) for all n bigger than ze…

Eclipse 编译错误 Access restriction:The type *** is not accessible due to restriction on... 解决方案

报错: Access restriction:The type JPEGCodec is not accessible due to restriction on required library C:\Program Files\Java\jre6\lib\rt.jar   解决方法: Project ->Properties -> java build path-> libraries, 先remove掉JRE System Library,然后再Add Library重新加入.…

Java出现No enclosing instance of type E is accessible. Must qualify the allocation with an enclosing

Java出现No enclosing instance of type E is accessible. Must qualify the allocation with an enclosing   最近在看Java,在编译写书上一个例子时,由于书上的代码只有一部分,于是就自己补了一个内部类.结果编译时出现:No enclosing instance of type E is accessible. Must qualify the allocation with an enclosing i…

[AngularJS] Accessible Button Events

Often buttons need to be handled by JavaScript, and if done improperly it can lead to accessibility issues. In this lesson you will improve a major news organization's global header with some basic HTML and JavaScript. Normal you should use native 'b…