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const MODES = (hljs) => {
return {
IMPORTANT: {
scope: 'meta',
begin: '!important'
},
BLOCK_COMMENT: hljs.C_BLOCK_COMMENT_MODE,
HEXCOLOR: {
scope: 'number',
begin: /#(([0-9a-fA-F]{3,4})|(([0-9a-fA-F]{2}){3,4}))\b/
},
FUNCTION_DISPATCH: {
className: "built_in",
begin: /[\w-]+(?=\()/
},
ATTRIBUTE_SELECTOR_MODE: {
scope: 'selector-attr',
begin: /\[/,
end: /\]/,
illegal: '$',
contains: [
hljs.APOS_STRING_MODE,
hljs.QUOTE_STRING_MODE
]
},
CSS_NUMBER_MODE: {
scope: 'number',
begin: hljs.NUMBER_RE + '(' +
'%|em|ex|ch|rem' +
'|vw|vh|vmin|vmax' +
'|cm|mm|in|pt|pc|px' +
'|deg|grad|rad|turn' +
'|s|ms' +
'|Hz|kHz' +
'|dpi|dpcm|dppx' +
')?',
relevance: 0
},
CSS_VARIABLE: {
className: "attr",
begin: /--[A-Za-z][A-Za-z0-9_-]*/
}
};
};
const TAGS = [
'a',
'abbr',
'address',
'article',
'aside',
'audio',
'b',
'blockquote',
'body',
'button',
'canvas',
'caption',
'cite',
'code',
'dd',
'del',
'details',
'dfn',
'div',
'dl',
'dt',
'em',
'fieldset',
'figcaption',
'figure',
'footer',
'form',
'h1',
'h2',
'h3',
'h4',
'h5',
'h6',
'header',
'hgroup',
'html',
'i',
'iframe',
'img',
'input',
'ins',
'kbd',
'label',
'legend',
'li',
'main',
'mark',
'menu',
'nav',
'object',
'ol',
'p',
'q',
'quote',
'samp',
'section',
'span',
'strong',
'summary',
'sup',
'table',
'tbody',
'td',
'textarea',
'tfoot',
'th',
'thead',
'time',
'tr',
'ul',
'var',
'video'
];
const MEDIA_FEATURES = [
'any-hover',
'any-pointer',
'aspect-ratio',
'color',
'color-gamut',
'color-index',
'device-aspect-ratio',
'device-height',
'device-width',
'display-mode',
'forced-colors',
'grid',
'height',
'hover',
'inverted-colors',
'monochrome',
'orientation',
'overflow-block',
'overflow-inline',
'pointer',
'prefers-color-scheme',
'prefers-contrast',
'prefers-reduced-motion',
'prefers-reduced-transparency',
'resolution',
'scan',
'scripting',
'update',
'width',
// TODO: find a better solution?
'min-width',
'max-width',
'min-height',
'max-height'
];
// https://developer.mozilla.org/en-US/docs/Web/CSS/Pseudo-classes
const PSEUDO_CLASSES = [
'active',
'any-link',
'blank',
'checked',
'current',
'default',
'defined',
'dir', // dir()
'disabled',
'drop',
'empty',
'enabled',
'first',
'first-child',
'first-of-type',
'fullscreen',
'future',
'focus',
'focus-visible',
'focus-within',
'has', // has()
'host', // host or host()
'host-context', // host-context()
'hover',
'indeterminate',
'in-range',
'invalid',
'is', // is()
'lang', // lang()
'last-child',
'last-of-type',
'left',
'link',
'local-link',
'not', // not()
'nth-child', // nth-child()
'nth-col', // nth-col()
'nth-last-child', // nth-last-child()
'nth-last-col', // nth-last-col()
'nth-last-of-type', //nth-last-of-type()
'nth-of-type', //nth-of-type()
'only-child',
'only-of-type',
'optional',
'out-of-range',
'past',
'placeholder-shown',
'read-only',
'read-write',
'required',
'right',
'root',
'scope',
'target',
'target-within',
'user-invalid',
'valid',
'visited',
'where' // where()
];
// https://developer.mozilla.org/en-US/docs/Web/CSS/Pseudo-elements
const PSEUDO_ELEMENTS = [
'after',
'backdrop',
'before',
'cue',
'cue-region',
'first-letter',
'first-line',
'grammar-error',
'marker',
'part',
'placeholder',
'selection',
'slotted',
'spelling-error'
];
const ATTRIBUTES = [
'align-content',
'align-items',
'align-self',
'all',
'animation',
'animation-delay',
'animation-direction',
'animation-duration',
'animation-fill-mode',
'animation-iteration-count',
'animation-name',
'animation-play-state',
'animation-timing-function',
'backface-visibility',
'background',
'background-attachment',
'background-blend-mode',
'background-clip',
'background-color',
'background-image',
'background-origin',
'background-position',
'background-repeat',
'background-size',
'block-size',
'border',
'border-block',
'border-block-color',
'border-block-end',
'border-block-end-color',
'border-block-end-style',
'border-block-end-width',
'border-block-start',
'border-block-start-color',
'border-block-start-style',
'border-block-start-width',
'border-block-style',
'border-block-width',
'border-bottom',
'border-bottom-color',
'border-bottom-left-radius',
'border-bottom-right-radius',
'border-bottom-style',
'border-bottom-width',
'border-collapse',
'border-color',
'border-image',
'border-image-outset',
'border-image-repeat',
'border-image-slice',
'border-image-source',
'border-image-width',
'border-inline',
'border-inline-color',
'border-inline-end',
'border-inline-end-color',
'border-inline-end-style',
'border-inline-end-width',
'border-inline-start',
'border-inline-start-color',
'border-inline-start-style',
'border-inline-start-width',
'border-inline-style',
'border-inline-width',
'border-left',
'border-left-color',
'border-left-style',
'border-left-width',
'border-radius',
'border-right',
'border-right-color',
'border-right-style',
'border-right-width',
'border-spacing',
'border-style',
'border-top',
'border-top-color',
'border-top-left-radius',
'border-top-right-radius',
'border-top-style',
'border-top-width',
'border-width',
'bottom',
'box-decoration-break',
'box-shadow',
'box-sizing',
'break-after',
'break-before',
'break-inside',
'caption-side',
'caret-color',
'clear',
'clip',
'clip-path',
'clip-rule',
'color',
'column-count',
'column-fill',
'column-gap',
'column-rule',
'column-rule-color',
'column-rule-style',
'column-rule-width',
'column-span',
'column-width',
'columns',
'contain',
'content',
'content-visibility',
'counter-increment',
'counter-reset',
'cue',
'cue-after',
'cue-before',
'cursor',
'direction',
'display',
'empty-cells',
'filter',
'flex',
'flex-basis',
'flex-direction',
'flex-flow',
'flex-grow',
'flex-shrink',
'flex-wrap',
'float',
'flow',
'font',
'font-display',
'font-family',
'font-feature-settings',
'font-kerning',
'font-language-override',
'font-size',
'font-size-adjust',
'font-smoothing',
'font-stretch',
'font-style',
'font-synthesis',
'font-variant',
'font-variant-caps',
'font-variant-east-asian',
'font-variant-ligatures',
'font-variant-numeric',
'font-variant-position',
'font-variation-settings',
'font-weight',
'gap',
'glyph-orientation-vertical',
'grid',
'grid-area',
'grid-auto-columns',
'grid-auto-flow',
'grid-auto-rows',
'grid-column',
'grid-column-end',
'grid-column-start',
'grid-gap',
'grid-row',
'grid-row-end',
'grid-row-start',
'grid-template',
'grid-template-areas',
'grid-template-columns',
'grid-template-rows',
'hanging-punctuation',
'height',
'hyphens',
'icon',
'image-orientation',
'image-rendering',
'image-resolution',
'ime-mode',
'inline-size',
'isolation',
'justify-content',
'left',
'letter-spacing',
'line-break',
'line-height',
'list-style',
'list-style-image',
'list-style-position',
'list-style-type',
'margin',
'margin-block',
'margin-block-end',
'margin-block-start',
'margin-bottom',
'margin-inline',
'margin-inline-end',
'margin-inline-start',
'margin-left',
'margin-right',
'margin-top',
'marks',
'mask',
'mask-border',
'mask-border-mode',
'mask-border-outset',
'mask-border-repeat',
'mask-border-slice',
'mask-border-source',
'mask-border-width',
'mask-clip',
'mask-composite',
'mask-image',
'mask-mode',
'mask-origin',
'mask-position',
'mask-repeat',
'mask-size',
'mask-type',
'max-block-size',
'max-height',
'max-inline-size',
'max-width',
'min-block-size',
'min-height',
'min-inline-size',
'min-width',
'mix-blend-mode',
'nav-down',
'nav-index',
'nav-left',
'nav-right',
'nav-up',
'none',
'normal',
'object-fit',
'object-position',
'opacity',
'order',
'orphans',
'outline',
'outline-color',
'outline-offset',
'outline-style',
'outline-width',
'overflow',
'overflow-wrap',
'overflow-x',
'overflow-y',
'padding',
'padding-block',
'padding-block-end',
'padding-block-start',
'padding-bottom',
'padding-inline',
'padding-inline-end',
'padding-inline-start',
'padding-left',
'padding-right',
'padding-top',
'page-break-after',
'page-break-before',
'page-break-inside',
'pause',
'pause-after',
'pause-before',
'perspective',
'perspective-origin',
'pointer-events',
'position',
'quotes',
'resize',
'rest',
'rest-after',
'rest-before',
'right',
'row-gap',
'scroll-margin',
'scroll-margin-block',
'scroll-margin-block-end',
'scroll-margin-block-start',
'scroll-margin-bottom',
'scroll-margin-inline',
'scroll-margin-inline-end',
'scroll-margin-inline-start',
'scroll-margin-left',
'scroll-margin-right',
'scroll-margin-top',
'scroll-padding',
'scroll-padding-block',
'scroll-padding-block-end',
'scroll-padding-block-start',
'scroll-padding-bottom',
'scroll-padding-inline',
'scroll-padding-inline-end',
'scroll-padding-inline-start',
'scroll-padding-left',
'scroll-padding-right',
'scroll-padding-top',
'scroll-snap-align',
'scroll-snap-stop',
'scroll-snap-type',
'scrollbar-color',
'scrollbar-gutter',
'scrollbar-width',
'shape-image-threshold',
'shape-margin',
'shape-outside',
'speak',
'speak-as',
'src', // @font-face
'tab-size',
'table-layout',
'text-align',
'text-align-all',
'text-align-last',
'text-combine-upright',
'text-decoration',
'text-decoration-color',
'text-decoration-line',
'text-decoration-style',
'text-emphasis',
'text-emphasis-color',
'text-emphasis-position',
'text-emphasis-style',
'text-indent',
'text-justify',
'text-orientation',
'text-overflow',
'text-rendering',
'text-shadow',
'text-transform',
'text-underline-position',
'top',
'transform',
'transform-box',
'transform-origin',
'transform-style',
'transition',
'transition-delay',
'transition-duration',
'transition-property',
'transition-timing-function',
'unicode-bidi',
'vertical-align',
'visibility',
'voice-balance',
'voice-duration',
'voice-family',
'voice-pitch',
'voice-range',
'voice-rate',
'voice-stress',
'voice-volume',
'white-space',
'widows',
'width',
'will-change',
'word-break',
'word-spacing',
'word-wrap',
'writing-mode',
'z-index'
// reverse makes sure longer attributes `font-weight` are matched fully
// instead of getting false positives on say `font`
].reverse();
/*
Language: CSS
Category: common, css, web
Website: https://developer.mozilla.org/en-US/docs/Web/CSS
*/
/** @type LanguageFn */
function css(hljs) {
const regex = hljs.regex;
const modes = MODES(hljs);
const VENDOR_PREFIX = { begin: /-(webkit|moz|ms|o)-(?=[a-z])/ };
const AT_MODIFIERS = "and or not only";
const AT_PROPERTY_RE = /@-?\w[\w]*(-\w+)*/; // @-webkit-keyframes
const IDENT_RE = '[a-zA-Z-][a-zA-Z0-9_-]*';
const STRINGS = [
hljs.APOS_STRING_MODE,
hljs.QUOTE_STRING_MODE
];
return {
name: 'CSS',
case_insensitive: true,
illegal: /[=|'\$]/,
keywords: { keyframePosition: "from to" },
classNameAliases: {
// for visual continuity with `tag {}` and because we
// don't have a great class for this?
keyframePosition: "selector-tag" },
contains: [
modes.BLOCK_COMMENT,
VENDOR_PREFIX,
// to recognize keyframe 40% etc which are outside the scope of our
// attribute value mode
modes.CSS_NUMBER_MODE,
{
className: 'selector-id',
begin: /#[A-Za-z0-9_-]+/,
relevance: 0
},
{
className: 'selector-class',
begin: '\\.' + IDENT_RE,
relevance: 0
},
modes.ATTRIBUTE_SELECTOR_MODE,
{
className: 'selector-pseudo',
variants: [
{ begin: ':(' + PSEUDO_CLASSES.join('|') + ')' },
{ begin: ':(:)?(' + PSEUDO_ELEMENTS.join('|') + ')' }
]
},
// we may actually need this (12/2020)
// { // pseudo-selector params
// begin: /\(/,
// end: /\)/,
// contains: [ hljs.CSS_NUMBER_MODE ]
// },
modes.CSS_VARIABLE,
{
className: 'attribute',
begin: '\\b(' + ATTRIBUTES.join('|') + ')\\b'
},
// attribute values
{
begin: /:/,
end: /[;}{]/,
contains: [
modes.BLOCK_COMMENT,
modes.HEXCOLOR,
modes.IMPORTANT,
modes.CSS_NUMBER_MODE,
...STRINGS,
// needed to highlight these as strings and to avoid issues with
// illegal characters that might be inside urls that would tigger the
// languages illegal stack
{
begin: /(url|data-uri)\(/,
end: /\)/,
relevance: 0, // from keywords
keywords: { built_in: "url data-uri" },
contains: [
...STRINGS,
{
className: "string",
// any character other than `)` as in `url()` will be the start
// of a string, which ends with `)` (from the parent mode)
begin: /[^)]/,
endsWithParent: true,
excludeEnd: true
}
]
},
modes.FUNCTION_DISPATCH
]
},
{
begin: regex.lookahead(/@/),
end: '[{;]',
relevance: 0,
illegal: /:/, // break on Less variables @var: ...
contains: [
{
className: 'keyword',
begin: AT_PROPERTY_RE
},
{
begin: /\s/,
endsWithParent: true,
excludeEnd: true,
relevance: 0,
keywords: {
$pattern: /[a-z-]+/,
keyword: AT_MODIFIERS,
attribute: MEDIA_FEATURES.join(" ")
},
contains: [
{
begin: /[a-z-]+(?=:)/,
className: "attribute"
},
...STRINGS,
modes.CSS_NUMBER_MODE
]
}
]
},
{
className: 'selector-tag',
begin: '\\b(' + TAGS.join('|') + ')\\b'
}
]
};
}
module.exports = css;

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