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    CSS documentation status

    This page tries to track ongoing documentation work in the MDN CSS section. Feel free to contribute!

    Summary

    Pages No tags Needs* tags Missing tags Editorial reviews Technical reviews Outdated pages Dev-doc-needed bugs Documentation requests Missing pages
    731 7 (1%) 313 (43%) 0 (0%) 2 (1%) 91 (13%) 30 (5%) 93 (13%) 38 (6%) 26 (4%)

    See also localization status of this section.

    No tags

    Found 7 pages. Learn more about how to tag pages.

    Needs* tags

    Found 313 pages. Learn more about how to deal with meta-tags.

    Editorial reviews

    Found 2 pages. Learn more about how to do an editorial review.

    Technical reviews

    Found 91 pages. Learn more about how to do a technical review.

    Outdated pages

    Found 30 pages. These pages haven't been updated in over a year. Outdated pages can have problems with both content and format. Look at these pages and consider: Is this page talking about the Web of today? Does it look consistent with newer pages in this topic area? If not, make any needed changes.

    Dev-doc-needed bugs

    Found 93 bugs. Learn more about how to resolve a dev-doc-needed bug.

    Bug Summary Release
    736431 Inline <svg> is given the CSS default height of 150px when the height is not explicitly specified ---
    912434 text-overflow: ellipsis does not work, when specified on an element that has "display: flex" ---
    426447 hasFeature broken for SVG 1.1 style SVG detection - regression. ---
    1110460 Support interpolate of clip-path basic shapes in CSS animations and transitions ---
    590468 Reduce size of chrome document layer due to status bar ---
    1209273 implement the 'color-adjust' CSS property to allow pages to opt in to printing background colors and images (-webkit-print-color-adjust) mozilla48
    1260366 first-letter doesn't apply on dash [maybe another punctuation symbols] mozilla48
    1228354 (mask-image) Support 'luminance' and 'match-source' values for 'mask-mode' mozilla48
    1243734 Have a pref to enable/ disable all new mask CSS properties added in bug 686281 mozilla48
    1259889 Consider adding an internal-only syntax for @supports to detect pref mozilla48
    1263516 Enable background-clip:text preference in non-release builds mozilla48
    1241750 Enable <details> and <summary> on Nightly/Aurora mozilla48
    1258657 Update the default style of summary element to match the html spec mozilla48
    1251999 [css-grid] Update <fixed-size> parsing to the latest spec mozilla47
    686281 Implement CSS Mask Image properties (mask, mask-image, etc.) mozilla47
    1218706 Make unicode-bidi: isolate the default for elements with a dir attribute mozilla47
    1250342 rename text-align(/-last): true to unsafe mozilla47
    1230478 [css-grid][css-align]Rename 'true' to 'unsafe' mozilla46
    1118820 [css-grid] Implement auto-fill, auto-fit in the repeat() function mozilla46
    1239128 Implement LinkStyle for SVGStyleElement interface mozilla46
    1213126 Enable layout.css.prefixes.webkit by default (though this was later restricted to non-release builds, in bug 1238827) mozilla46
    1230207 [css-grid][css-flexbox] Implement grid/flex layout for <fieldset> mozilla46
    1233106 implement changes to css-align property computation mozilla46
    1157064 experimental implementation of font-display CSS @font-face descriptor mozilla46
    1221677 [css-grid] Put the 'subgrid' support behind a pref, disabled by default mozilla45
    1000592 Enable CSS Grid by default in non-release channels mozilla45
    1176782 [css-grid][css-align] Implement full support for the CSS Box Alignment spec in the style system. mozilla45
    1224424 mask-mode must not have a value called 'auto' mozilla45
    1215484 Figure out how high contrast / "ignore author colors" should apply to SVGs mozilla44
    1126230 Use top layer for Fullscreen API mozilla44
    920734 support window.orientation and orientationchange event mozilla44
    1149381 enable the preference for the CSS Font Loading API in release builds mozilla41
    1072101 implement the remaining Set-like API of FontFaceSet mozilla40
    1152033 expose CSS tokenizer to javascript mozilla40
    1028716 update values of -moz-orient for <progress> and <meter> to remove 'auto', and add 'inline' (new initial value) and 'block' values with writing-mode support mozilla40
    1125455 rewrite cascading of CSS Transitions and Animations to match current spec mozilla39
    649142 support logical box properties (-start/-end) without hidden longhand properties mozilla38
    960465 rewrite starting of CSS transitions to match current spec mozilla38
    1107584 ship <marker orient="auto-start-reverse"> mozilla37
    886390 Assigning to innerHTML on an SVG element should create elements in the SVG namespace mozilla36
    1087559 Enable CSSOM-View scroll behavior DOM method extensions by default (Except for Fennec) mozilla36
    1045754 Implement alternative to CSSOM-View scroll-behavior Element.scrollTop and Element.scrollLeft extensions mozilla36
    1074056 Add support for interpolation hints to CSS gradients mozilla36
    1087562 Enable CSSOM-View scroll behavior CSS property by default (Except for Fennec) mozilla36
    1041951 convert font-variant to a shorthand and parse font-variant subproperty values mozilla34
    1022818 Implement CSSOM-View smooth scrolling DOM Methods mozilla34
    975744 enable font-variant-* / font-feature in release by default mozilla34
    1015474 Update min-width:auto/min-height:auto support to match updated flexbox spec language mozilla34
    1035106 Add new APIs to DOMUtils: colorToRGBA, IsValidCSSColor & cssPropertyIsValid mozilla33
    966166 Implement @counter-style rule mozilla33
    1006595 Add domUtils.GetCSSSubPropertiesForProperty, getCSSPropertyIsShorthand, CSSPropertySupportsType (Color, Gradient etc.) mozilla33
    1008455 Avoid loading the xul.css UA style sheet when possible mozilla32
    999964 Implementation Proposal for 'clipped' option of SVG 2 getBBox method. mozilla32
    957833 ship CSS Variables (that is, enable the preference) mozilla31
    983528 enable paint-order property by default mozilla31
    918189 Implement Node.convertPoint/Rect/QuadFromNode mozilla31
    850805 Implement DOMPoint (aka WebKitPoint) mozilla31
    917755 Implement Node.getBoxQuads mozilla31
    964200 Implement Filter Effects Module feDropShadow filter mozilla30
    966992 Implement overflow-clip-box: content-box mozilla30
    943249 The overflow property on an <iframe> is propagated to the viewport of the inner document (unlike other UAs) mozilla29
    946920 Moving a child element outside of a parent element while moving the parent element, both using transform: translate(), will cause the child element to disappear mozilla29
    956513 SVG text is drawn with wrong position mozilla29
    773296 implement CSS3 variables mozilla29
    944291 Cropping of element with css transform + animation applied, starting in Firefox 25 mozilla29
    947728 Provide a way for content to hide <input type=number>'s spinner mozilla28
    939784 Provide a notification when the applicable state of a style sheet changes mozilla28
    929991 Implement 'true' alignment for text-align mozilla27
    835048 Figure out if SVGElement.ownerSVGElement should throw mozilla26
    798843 change value names for -moz-objectFill to context-fill etc., and put them behind opentype SVG pref mozilla26
    879659 implement <marker orient="auto-start-reverse"> from SVG 2 mozilla25
    887741 Allow CSS at-rules in declaration lists mozilla25
    569722 Firefox SVG support does not implement the textLength and lengthAdjust attribute functionality of <text> elements mozilla25
    453650 mechanism for tracking reflows in debugger mozilla24
    771551 Add CSS Media Query media feature for device hardware buttons mozilla24
    549861 implement parsing of font feature properties mozilla24
    851379 Make flex item vertical margin/padding resolve percentages against height of the flex container mozilla23
    785606 Consider implementing viewBox="none" from SVG 1.2 Tiny mozilla22
    827799 Visually Hidden HTML 5 technique does not hide the caption in a table mozilla21
    804944 add preferences for sets of CSS prefixed properties mozilla19
    745025 Implement CanvasElement.mozPrintCallback mozilla18
    732209 Allow access to the rules of cross-origin sheets that have undergone a CORS check mozilla18
    737003 Offer a way to apply user agent stylesheet on a given document mozilla18
    619964 Implement FillPaint and StrokePaint filter sources mozilla17
    774122 limit CSS parser hashless-color and unitless-length quirks to only the properties that need them mozilla17
    512525 Implement the <view> element mozilla15
    512514 Implement hyperlink targeting of animation elements mozilla15
    759124 Implement useCurrentView mozilla15
    528332 Feature Request: Implement non-scaling-stroke mozilla15
    721920 Honor the 'lang' attribute on SVG as we do in HTML mozilla13
    665597 Include margin calculations in FinishAndStoreOverflow mozilla12
    589640 (ietestcenter) HTML5 Foreign Content 14/24: <altGlyphDef> is not an SVGElement mozilla11
    611099 remove handling of percentages as intrinsic widths/heights (SVG height="100%" width="100%" defaults) mozilla11

    Browse as bug list.

    Documentation requests

    Found 38 bugs. Documentation request bugs can contain various kinds work related to MDN pages. Read through the bug and ask questions in the bug if in doubt.

    Bug Summary
    475817 Better documentation needed for syntax of Mozilla CSS extensions using properties
    819654 Convert all samples of the CSS Reference to Live Samples
    819657 Convert all samples of CSS tutorials to Live Samples
    819658 Translations of CSS Reference must use updated Live Samples
    819661 Translations of CSS Tutorials must use updated Live Samples
    848308 We need MDC to better document the styling of form controls using pseudo elements
    873837 Update "Scaling background images" to cover background-image and background-size
    885664 MARGIN-TOP : Confusing explanation about the relative area when using percentage
    904680 Missing Documentation (dead links) for Inline Formatting Context
    963742 @font-face example font Bitstream Vera Bold is broken in IE9-10 (tested) possibly others.
    1011667 Document all @viewport descriptors
    1071549 Explanation about multiple selectors (comma)
    1120964 Split display property in sub pages
    1133414 Add page for deprecated media types and groups
    1180569 https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors
    1189440 Consider using shepherd (bikeshed tool) in the context of CSSData
    1229544 flex-grow fails to describe how it modifies layout
    1230720 [meta] Document non-standard <input>-related CSS pseudo-elements & pseudo-classes
    1230721 Document ::-ms-browse pseudo-element
    1230724 Document ::-ms-check pseudo-element
    1230725 Document ::-webkit-file-upload-button pseudo-element
    1230727 Document ::-webkit-input-placeholder pseudo-element
    1231610 Document ::-webkit-inner-spin-button and ::-webkit-outer-spin-button pseudo-elements
    1231850 Document non-standard pseudo-elements of HTML5 <progress> element
    1238322 Document WebVTT's :current, :past, :future CSS pseudo-classes
    1240279 Document Mozilla-specific pseudo-classes and pseudo-elements for the <meter> element
    1240280 Document WebKit-specific pseudo-classes and pseudo-elements for the <meter> element
    1241133 Document font-family (descriptor of @font-face)
    1247845 The first two examples for CSS transform don't work for me
    1252805 text-transform does nothing with ::first-line pseudo-element
    1252853 Collapsing margins and flexbox
    1252892 @page/size documentation missing (link from @page)
    1255315 Can't find the meaning of "display: -moz-box" style attribute
    1256335 The description for Max-Height percentage is ambiguous
    1262401 Page Not Found: https://developer.mozilla.org/en-US/docs/Web/CSS/@page/size
    1263828 Some CSS properties appear twice in the sidebar
    1266544 user-select:auto not documented
    1267064 Update all CSS2 links to CSS 2.2

    Browse as bug list.

    Localizations

    Please help us to localize this documentation into different languages. Read more about how to translate.

    Language Pages Translated Translations up to date
    bn-BD 731 12 (1%) 3 (25%)
    cs 677 4 (0%) 0 (0%)
    de 731 405 (55%) 205 (50%)
    es 731 227 (31%) 100 (44%)
    fa 731 4 (0%) 0 (0%)
    fr 731 571 (78%) 431 (75%)
    it 731 30 (4%) 6 (20%)
    ja 731 360 (49%) 144 (40%)
    ko 694 50 (7%) 18 (36%)
    nl 677 5 (0%) 2 (40%)
    pl 731 138 (18%) 21 (15%)
    pt-BR 731 84 (11%) 28 (33%)
    pt-PT 677 64 (9%) 12 (18%)
    ru 677 59 (8%) 31 (52%)
    tr 677 6 (0%) 1 (16%)
    zh-CN 677 244 (36%) 124 (50%)
    zh-TW 677 27 (3%) 12 (44%)

    Missing pages

    Learn more about how to document a CSS property.

    Missing standard CSS entities implemented in Gecko

    Notes

    Tagging standard

    • Every page should have the tag "CSS".
    • CSS properties belonging to a group have the tag of that group. E.g. "CSS Flexible Boxes"

    Wishlist

    Ideas for future projects or things the ideal CSS documentation should have:

    • Compatibility summary list
    • CSS variables
    • CSS to style forms (non-standard, including Chrome and IE specific styling)
    • Better CSS flexbox documentation

    Macros

    These macros are maintained and actively used in the MDN CSS area. If you want to create and use a new macro, please talk to MDN admins and the CSS topic driver.

    Help the 'CSS' documentation project…
    Topic driver : Jean-Yves Perrier (IRC nickname: teoli)
    Look at the current status of the 'CSS' documentation.
    Don't hesitate to contact us on #mdn or on the dev-mdc mailing-list:

    Document Tags and Contributors

    Tags: 
     Contributors to this page: fscholz, Sebastianz, TylerH, jswisher, teoli
     Last updated by: fscholz,