59 lines
1.2 KiB
JavaScript
59 lines
1.2 KiB
JavaScript
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'use strict';
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const isScssVariable = require('./isScssVariable');
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const { isRule } = require('./typeGuards');
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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 | import('postcss-less').Declaration} decl
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*/
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module.exports = function isStandardSyntaxDeclaration(decl) {
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const prop = decl.prop;
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const parent = decl.parent;
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// SCSS var; covers map and list declarations
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if (isScssVariable(prop)) {
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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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// Less map declaration
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if (parent && parent.type === 'atrule' && parent.raws.afterName === ':') {
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return false;
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}
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// Less map (e.g. #my-map() { myprop: red; })
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if (
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parent &&
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isRule(parent) &&
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parent.selector &&
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parent.selector.startsWith('#') &&
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parent.selector.endsWith('()')
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) {
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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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parent &&
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isRule(parent) &&
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parent.selector &&
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parent.selector[parent.selector.length - 1] === ':' &&
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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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if ('extend' in decl && 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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