62 lines
1.4 KiB
JavaScript
62 lines
1.4 KiB
JavaScript
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'use strict';
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const { isRoot } = require('./typeGuards');
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/**
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* @param {string} [lang]
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*/
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function isStandardSyntaxLang(lang) {
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return lang && (lang === 'css' || lang === 'custom-template' || lang === 'template-literal');
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}
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/**
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* Check whether a declaration is standard
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*
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* @param {import('postcss').Declaration} decl
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*/
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module.exports = function(decl) {
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const prop = decl.prop;
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const parent = decl.parent;
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// Declarations belong in a declaration block or standard CSS source
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if (
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isRoot(parent) &&
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parent.source &&
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!isStandardSyntaxLang(
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/** @type {import('postcss').NodeSource & {lang?: string}} */ (parent.source).lang,
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)
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) {
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return false;
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}
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// Sass var (e.g. $var: x), nested list (e.g. $list: (x)) or nested map (e.g. $map: (key:value))
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if (prop[0] === '$') {
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return false;
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}
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// Less var (e.g. @var: x), but exclude variable interpolation (e.g. @{var})
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if (prop[0] === '@' && prop[1] !== '{') {
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return false;
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}
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// Sass nested properties (e.g. border: { style: solid; color: red; })
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if (
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// @ts-ignore TODO TYPES selector does not exists
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parent.selector &&
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// @ts-ignore
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parent.selector[parent.selector.length - 1] === ':' &&
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// @ts-ignore
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parent.selector.substring(0, 2) !== '--'
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) {
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return false;
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}
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// Less &:extend
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// @ts-ignore TODO TYPES extend does not exists
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if (decl.extend) {
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return false;
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}
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return true;
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};
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