48 lines
1.9 KiB
JavaScript
48 lines
1.9 KiB
JavaScript
/**
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* @fileoverview Rule to disallow unmatchable selectors.
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* @author TKDev7
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*/
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//-----------------------------------------------------------------------------
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// Type Definitions
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//-----------------------------------------------------------------------------
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/**
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* @import { CSSRuleDefinition } from "../types.js"
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* @typedef {"unmatchableSelector"} NoUnmatchableSelectorsMessageIds
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* @typedef {CSSRuleDefinition<{ RuleOptions: [], MessageIds: NoUnmatchableSelectorsMessageIds }>} NoUnmatchableSelectorsRuleDefinition
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*/
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//-----------------------------------------------------------------------------
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// Rule Definition
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//-----------------------------------------------------------------------------
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export default /** @satisfies {NoUnmatchableSelectorsRuleDefinition} */ ({
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meta: {
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type: "problem",
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docs: {
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description: "Disallow unmatchable selectors",
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recommended: true,
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url: "https://github.com/eslint/css/blob/main/docs/rules/no-unmatchable-selectors.md",
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},
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messages: {
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unmatchableSelector: "Unexpected unmatchable selector '{{selector}}'.",
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},
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},
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create(context) {
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const { sourceCode } = context;
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return {
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AnPlusB(node) {
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// Either node.a or node.b can be null; Number(null) === 0.
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// This coercion is intentional so that omitted coefficients are treated as 0.
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const a = Number(node.a);
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const b = Number(node.b);
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if (a <= 0 && b <= 0) {
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const pseudo = sourceCode.getParent(sourceCode.getParent(node));
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context.report({
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loc: pseudo.loc,
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messageId: "unmatchableSelector",
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data: { selector: sourceCode.getText(pseudo) },
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});
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}
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},
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};
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},
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});
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