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8756d82cf6
Summary: I'm pretty sure that `@group` annotations are useless now... see D9855. Also fixed various other minor issues. Test Plan: Eye-ball it. Reviewers: #blessed_reviewers, epriestley, chad Reviewed By: #blessed_reviewers, epriestley Subscribers: epriestley, Korvin, hach-que Differential Revision: https://secure.phabricator.com/D9859
89 lines
2.2 KiB
Text
89 lines
2.2 KiB
Text
@title CSS Coding Standards
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@group standards
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This document describes CSS features and coding standards for Phabricator.
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= Overview =
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This document describes technical and style guidelines for writing CSS in
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Phabricator.
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Phabricator has a limited CSS preprocessor. This document describes the features
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it makes available.
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= Z-Indexes =
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You should put all `z-index` rules in `z-index.css`, and keep them sorted. The
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goal is to make indexes relatively manageable and reduce the escalation of the
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Great Z-Index War where all indexes grow without bound in an endless arms race.
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= Color Variables =
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Phabricator's preprocessor provides some standard color variables. You can
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reference these with `{$color}`. For example:
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span.critical {
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color: {$red};
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}
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You can find a list of all available colors in the **UIExamples** application.
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= Printable Rules =
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If you preface a rule with `!print`, it will be transformed into a print rule
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and activated when the user is printing the page or viewing a printable version
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of the page:
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lang=css
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!print div.menu {
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display: none;
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}
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Specifically, this directive causes two copies of the rule to be written out.
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The output will look something like this:
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lang=css
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.printable div.menu {
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display: none;
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}
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@media print {
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div.menu {
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display: none;
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}
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}
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The former will activate when users look at the printable versions of pages, by
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adding `__print__` to the URI. The latter will be activated in print contexts
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by the media query.
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= Device Rules =
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Phabricator's environment defines several device classes which can be used to
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adjust behavior responsively. In particular:
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lang=css
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.device-phone {
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/* Smallest breakpoint, usually for phones. */
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}
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.device-tablet {
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/* Middle breakpoint, usually for tablets. */
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}
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.device-desktop {
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/* Largest breakpoint, usually for desktops. */
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}
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Since many rules are specific to handheld devices, the `.device` class selects
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either tablets or phones:
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.device {
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/* Phone or tablet (not desktop). */
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}
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= Image Inlining =
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Phabricator's CSS preprocessor automatically inlines images which are less than
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32KB using `data:` URIs. This is primarily useful for gradients or textures
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which are small and difficult to sprite.
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