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index.js
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index.js
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// @ts-nocheck
'use strict';
const eachDeclarationBlock = require('../../utils/eachDeclarationBlock');
const isCustomProperty = require('../../utils/isCustomProperty');
const isStandardSyntaxProperty = require('../../utils/isStandardSyntaxProperty');
const report = require('../../utils/report');
const ruleMessages = require('../../utils/ruleMessages');
const validateOptions = require('../../utils/validateOptions');
const ruleName = 'declaration-block-no-duplicate-custom-properties';
const messages = ruleMessages(ruleName, {
rejected: (property) => `Unexpected duplicate "${property}"`,
});
function rule(on) {
return (root, result) => {
const validOptions = validateOptions(result, ruleName, { actual: on });
if (!validOptions) {
return;
}
eachDeclarationBlock(root, (eachDecl) => {
const decls = new Set();
eachDecl((decl) => {
const prop = decl.prop;
if (!isStandardSyntaxProperty(prop)) {
return;
}
if (!isCustomProperty(prop)) {
return;
}
const isDuplicate = decls.has(prop);
if (isDuplicate) {
report({
message: messages.rejected(prop),
node: decl,
result,
ruleName,
});
return;
}
decls.add(prop);
});
});
};
}
rule.ruleName = ruleName;
rule.messages = messages;
module.exports = rule;