[whatwg] Allow empty string for input type=color
ian at hixie.ch
Wed Jun 13 15:19:04 PDT 2012
On Thu, 3 May 2012, Markus Ernst wrote:
> I apologize in case this has been discussed before - the list archive
> search seems to be broken right now, as it does not find any matches
> when searching for "color".
> I just noticed a note in the spec of input type=color
> "Note: In this state, there is always a color picked, and there is no
> way to set the value to the empty string."
> If I understand the spec correctly, entering no value defaults to
> #000000, thus the required attribute does not apply. What are the
> reasons for this? I am sure there were good reasons to specify it this
> way, anyway I don't see them right now. "Not selected" is actually very
> different from "black".
> I see the following reasons for allowing the empty string:
> 1. An application might want to give the user the choice of not
> selecting a color. Not specifying a color is the easiest way to state
> that the default color should be used, be it black or other.
> 2. An application might want to force the user to make an explicit
> selection. It may not be able to distinguish whether "black" was
> explicitly selected, or the user forgot to specify a color.
> 3. Applications need to deal with the empty string anyway, as legacy
> browsers show a text field.
On Thu, 3 May 2012, Anne van Kesteren wrote:
> "Not selected" is not something typically supported by native color
On Fri, 4 May 2012, Shaun Moss wrote:
> The way things are done is not always the best way. Most colour pickers
> are used in instances where "not selected" would make no sense.
> However, as you're designing a widget for the web that may be used by
> billions of people in any number of unforeseen ways, flexibility is a
> virtue, and the option to clear the field would be an improvement. If
> you don't allow a "not selected" or null option, this would basically
> force all colour widgets to be required fields, which may not be what
> the form designer wants.
> To compare, some date pickers do not allow you to clear the field, but
> some do. For the web, it's a useful feature.
On Thu, 3 May 2012, Ashley Sheridan wrote:
> Would the colour pickers allow the selection of the alpha channel at the
> time of choosing? If so, couldn't you allow a full transparent colour to
> be used where null couldn't?
On Thu, 3 May 2012, Alfonso Martínez de Lizarrondo wrote:
> Being able to not select a color isn't so strange.
> Everyone is used to word processors, and they usually have an option to
> select the color for the text and background. And among those available
> colors there's an option to use the default text color or to use a
> transparent background/no color.
While it's true that certain colour pickers do have a "no colour" option,
it is generally the case that, as with range controls, there's no "none"
option in the typical UI.
I expect we will add support for this at a future time, just like we will
likely add support for more detailed range controls (e.g. that have a min
and a max slider).
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
More information about the whatwg