[whatwg] <table> Relation between "bordercolor" and "border" attributes

Ian Hickson ian at hixie.ch
Thu Jun 7 16:44:33 PDT 2012

On Tue, 6 Mar 2012, Kishore Bolisetty wrote:
> I have been looking at spec for finding relation between html table's
> bordercolor and border attributes.
> ------------------------------
> When a table element has a bordercolor attribute, its value is expected 
> to be parsed using the rules for parsing a legacy color value , and if 
> that does not return an error, the user agent is expected to treat the 
> attribute as a presentational hint setting the element's 
> 'border-top-color', 'border-right-color', 'border-bottom-color', and 
> 'border-right-color' properties to the resulting color. 
> The table element's border attribute maps to the pixel length properties 
> 'border-top-width', 'border-right-width', 'border-bottom-width', 
> 'border-left-width' on the element. If the attribute is present but 
> parsing the attribute's value using the rules for parsing non-negative 
> integers generates an error, a default value of 1px is expected to be 
> used for that property instead.
> ------------------------------
> But it doesn't talks about the behaviour - what if border is not 
> specified but bordercolor is specified?

You follow the rules in that section, and end up with border-color 
specified, but border-style and border-width not specified, and no border 

> Looks like browsers have taken their own implementations on this, Opera 
> and Mozilla displays bordercolor only if border is specified, where as 
> Safari displays bordercolor assuming a default border.

Safari is incorrect.

On Tue, 6 Mar 2012, Tab Atkins Jr. wrote:
> This behavior depends on the browser's default stylesheet, and whether 
> they default borders to "border-style: solid; border-color: 
> currentColor;" or "border-style: solid; border-width: 0px;".  Browsers 
> are allowed to do either.

The spec actually defines this now. It's 'border-color: gray', 
border-style and border-width at initial values (none and medium 
respectively), assuming there's no attributes making things more 

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'

More information about the whatwg mailing list