Get the Latest Bytes Updates. By using this site, you agree to our Privacy Policy and Terms of Use. Jun 27 '08 Follow Post Reply 1 David Trimboli yaugin wrote: What is the practical difference between these elements? Microsoft Excel How to implement control array with vba. General hadr monitor script reply views Thread by suresh last post: by. General The research path of clustering reply views Thread by goatbishop last post: by.
Career Advice Do you think a 50 year old male with no degree can still become a coder? General add 1 month to date reply views Thread by bytM3 last post: by. General A tool to try open-source projects quickly reply views Thread by Trystan last post: by. General I want to be a programmer. Possible values for this attribute are:.
Only after this selector the vertical-align property can be used. Content categories None. Permitted content If the span attribute is present: none, it is an empty element. The end tag may be omitted, if it is not followed by a space or a comment. Possible values are: left , aligning the content to the left of the cell center , centering the content in the cell right , aligning the content to the right of the cell justify , inserting spaces into the textual content so that the content is justified in the cell char , aligning the textual content on a special character with a minimal offset, defined by the char and charoff attributes.
If the span attribute is present: none, it is an empty element. No corresponding role. A colgroup is used in a table element to help understand complex hierarchy of information within tables with irregular headers. The WAI has a complete information page about how to handle such situation: Tables with irregular headers and understand the use of col and colgroup. To associate the first-level headers properly with all cells of both columns, the column structure needs to be defined at the beginning of the table.
That being said, the best use case for those elements is for styling columns without repeating the style or class attributes:.
This is why we should use colgroup and col : Access to everyone regardless of disability. Few days ago, I was coding a table and I was introduced to a tags I never saw before, the colgroup and the col tags. How I have to use it? It is mandatory to declare them? Well I personally like to know how things works, so I stated my research asking on the web how to use these tags.
I found good information in so many blogs, but most of the info I found was somehow confusing. Some articles talked about these tags as a way to style columns, other articles mentioned them as a way to have a better workflow while working with tables, but there is a website that explained in the right way.
I finally understood the why, the how and I just want to share this info with you. The colgroup tag is the way to declare a group of columns within a table, while col is the way to declare single columns. In the Example 2, the second colgroup was declared to span 2 columns, but inside was declared a col tag that overwrite this command and now is telling to the UA to span 3 columns instead of 2.
And why this is a problem? The power of the Web is in its universality. Access by everyone regardless of disability is an essential aspect.
So by marking up our content we are not only making our content available to everyone but also we are getting a lot of benefits:. There is also a strong business case for accessibility. Accessibility overlaps with other best practices such as mobile web design, device independence, multi-modal interaction, usability, design for older users, and search engine optimization SEO.
Case studies show that accessible websites have better search results, reduced maintenance costs, and increased audience reach, among other benefits. Developing a Web Accessibility Business Case for Your Organization details the social, technical, financial, and legal benefits of web accessibility.
The previous w3. Besides colgroup and col there are also other tags we should use it is not mandatory to implement this, but as a web developers, and in my opinion, is our duty to design and implement content available to everyone regardless their abilities or absence of any of it like , and which I am not going to explain since there are a lot of good articles about it. I hope this information could be useful for someone as it was for me.
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