Home > Developer > JavaScript

Detailed description of the aria-label and aria-labelledby applications of Bootstrap, arialabelbootstrap

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

Detailed description of the aria-label and aria-labelledby applications of Bootstrap, arialabelbootstrap

Aria-label

Normally, the input component of the form has a corresponding label. When the input component gets the focus, the screen reader reads the text in the corresponding label.
For example:

<! DOCTYPE html> 



However, if we do not set a label for the input box, when it gets the focus, the screen reader will read the value of the aria-label attribute, and the aria-label will not be visually displayed.
For example:


<Body> <form role = "form"> <div class = "form-group col-lg-3 form-horizontal"> <div class = "col-lg-7"> <input type = "text" id = "idCard" class = "form-control" aria-label = "id card number"> </div> </form> </body>




Aria-labelledby attributes


When the expected label text already exists in other elements, you can use aria-labelledby and set its value to the id of all read elements. As follows:
When ul gets the focus, the screen reader reads: "select your position"


<Body> <div class = "dropdown"> <button type = "button" class = "btn dropdown-toggle" id = "dropdownMenu1" data-toggle = "dropdown"> select your position <span class = "caret"> </span> </button> <ul class = "dropdown-menu" role = "menu" aria-labelledby = "dropdownMenu1"> <li role = "presentation"> <a role = "menuitem" tabindex = "-1" href = "#"> Test Engineer </a> </li> <li role = "presentation"> <a role = "menuitem" tabindex = "-1" href = "#"> Development Engineer </a> </li> <li role =" presentation "> <a role =" menuitem "tabindex ="-1 "href =" # "> sales engineer </a> </li> </ul> </div> </body>




PS: if an element contains both aria-labelledby and aria-label, the read screen software first reads the content of aria-labelledby.


The above content is the introduction of the Bootstrap's aria-label and aria-labelledby application. I hope this article will help you, at the same time, I would like to thank you for your constant support for the help House website.

Articles you may be interested in:

 
    
 
  
  • ServerVariables set to retrieve predefined Environment Variables
    • 
 
  
  • Php Undefined index and Undefined variable solution
    • 
 
  
  • You * might * want to use the less safe log_bin_trust_function_creators variable
    • 
 
  
  • Asp.net Request. ServerVariables []
    • 
 
  
  • PHP prompts Notice: Undefined variable solution
    • 
 
  
  • Use c ++ 11 to build a good variant Method
    • 
 
  
  • MariaDB (Mysql Branch) my. cnf configuration file Chinese comments
    • 
 
  
  • Differences between MySQL and mariadb
    •

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
description of dell laptop description of sunrise description of visual studio all tags of html with description and example description of net description of core iphone description of features
Related Article
JavaScript solution to the eight Queens Problem method summar...
The difference between single and double quotes in JavaScript...
Http status code: 301, 302 redirection, 302 redirection
The html space symbol nbsp; ensp; emsp; introduces and implem...
Ajax and 302 response code Testing
Ajax and 302 response code test_javascript-js tutorial

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More