110 lines
4.2 KiB
Markdown
110 lines
4.2 KiB
Markdown
Some elements of
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[HTML5](http://www.whatwg.org/specs/web-apps/current-work/multipage/) can be
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safely supported by ikiwiki. There are [several differences between HTML4 and
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HTML5](http://www.w3.org/TR/html5-diff/).
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[[!template id=gitbranch branch=hendry/html5 author="[[Kai_Hendry|hendry]]"]]
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* [HTML5 branch](http://git.webconverger.org/?p=ikiwiki;h=refs/heads/html5)
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* [ikiwiki instance with HTML5 templates](http://natalian.org)
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* [HTML5 outliner tool](http://gsnedders.html5.org/outliner/) -- to check you have the structure of your markup correct
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> Kai, thanks enormously for working on this. I switched a page to
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> the html5 doctype today, and was rather pleasently suprised that it
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> validated, except for the new Cache-Control meta tag. Now I see you're
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> well ahead of me. --[[Joey]]
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>
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> So, how should ikiwiki support html5? There are basically 3 approaches:
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>
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> 1. Allow users to add html5 tags to their existing xhtml pages.
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> What has been done so far, can be extended. Basically works
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> in browsers, if you don't care about standards. A good prerequisite
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> for anything else, anyway.
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> 2. Have both a html5 and a xhtml mode, allow user to select.
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> 3. Switch to html5 in eg, ikiwiki 4; users have to deal with
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> any custom markup on their pages/templates that breaks then.
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>
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> The second option seems fairly tractable from what I see here and in
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> your branch. You made only relatively minor changes to 10 templates.
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> It would probably not be too dreadful to put them in ifdefs. I've made a
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> small start at doing that.
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>
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> Some of your changes are obvious, like using the new `time` and
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> and `article` elements. Looks like I can't merge it as-is though
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> due to other changes.
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>
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> Other ideas:
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>
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> * Use aside for the sidebar? Or for the [[templates/note]] template?
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> * Use nav for the actionbar
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> * Use details tag instead of the javascript in the toggle plugin.
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> (Need to wait on browser support probably.)
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>
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> --[[Joey]]
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# htmlscrubber.pm needs to not scrub new HTML5 elements
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* [new elements](http://www.w3.org/TR/html5-diff/#new-elements)
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> Many added now.
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>
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> Things I left out, too hard to understand today:
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> Attributes contenteditable,
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> data-\*, draggable, role, aria-\*.
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> Tags command, keygen, output.
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>
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> Clearly unsafe: embed.
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>
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> Apparently cannot be used w/o javascript: menu.
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>
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> I have not added the new `ping` attribute, because parsing a
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> space-separeated list of urls to avoid javascript injection is annoying,
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> and the attribute seems generally dubious.
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> --[[Joey]]
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# HTML5 Validation and t/html.t
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[validator.nu](http://validator.nu/) is the authorative HTML5 validator,
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however it is almost impossible to sanely introduce as a build dependency
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because of its insane Java requirements. :( I test locally via
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[cURL](http://wiki.whatwg.org/wiki/IDE), though Debian packages cannot be built
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with a network dependency.
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In the future, hopefully ikiwiki can test for valid HTML5 using [Relax NG
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schema](http://syntax.whattf.org/) using a Debian package tool
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[rnv](http://packages.qa.debian.org/r/rnv.html).
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> Validation in the test suite is nice, but I am willing to lose those
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> tests for a while. --[[Joey]]
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# HTML5 migration issues
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# [article](http://www.whatwg.org/specs/web-apps/current-work/multipage/semantics.html#the-article-element) element
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This element is poorly supported by browsers. As a workaround, `style.css` needs:
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article {
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display: block;
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}
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Internet Explorer will display it as a block, though you can't seem to be able to further control the style.
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## Time element
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The [time element](http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-time-element) ideally needs the datatime= attribute set by a template variable with what [HTML5 defines as a valid datetime string](http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#valid-global-date-and-time-string).
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As a workaround:
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au:~% grep timeformat natalian.setup
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timeformat => '%Y-%m-%d',
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> Also, the [[plugins/relativedate]] plugin needs to be updated to
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> support relatatizing the contents of time elements. --[[Joey]]
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> Done and done; in html5 mode it uses the time tag, and even
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> adds pubdate when displaying ctimes. --[[Joey]]
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## tidy plugin
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Will reformat html5 to html4.
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