is -negative margin or padding invalid CSS according to W3C?

css w3c w3c-validation
Jitendra Vyas picture Jitendra Vyas · Oct 26, 2009 · Viewed 8.9k times · Source

is -negative margin or padding are invalid CSS aaccording to W3C ?

Answer

Andrew Hare picture Andrew Hare · Oct 26, 2009

According to Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification - 8.4 Padding properties, negative margin values are valid, negative padding values are not:

Unlike margin properties, values for padding values cannot be negative

Related questions

There is no attribute "allowtransparency"

I am looking for some alternate way to do: <iframe transparency=true ... When I do the W3C validation, I am getting the error: Column 31: there is no attribute "allowtransparency" If use this CSS, .iframe-trans-fix{ opacity: 0; filter:alpha(opacity=0); } …

Read More
In CSS Flexbox, why are there no "justify-items" and "justify-self" properties?

Consider the main axis and cross axis of a flex container:                                                                                                                                                    Source: W3C To align flex items along the main axis there is one property: justify-content To align flex items along the cross axis there are three properties: align-content …

Read More
Why are margin/padding percentages in CSS always calculated against width?

If you look at the CSS box model spec, you'll observe the following: The [margin] percentage is calculated with respect to the width of the generated box's containing block. Note that this is true for 'margin-top' and 'margin-bottom' as well. …

Read More