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22 lines
683 B
JavaScript
22 lines
683 B
JavaScript
// @ts-check
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"use strict";
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const { addErrorDetailIf, filterTokens } = require("../helpers");
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module.exports = {
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"names": [ "MD001", "heading-increment", "header-increment" ],
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"description": "Heading levels should only increment by one level at a time",
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"tags": [ "headings", "headers" ],
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"function": function MD001(params, onError) {
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let prevLevel = 0;
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filterTokens(params, "heading_open", function forToken(token) {
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const level = parseInt(token.tag.slice(1), 10);
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if (prevLevel && (level > prevLevel)) {
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addErrorDetailIf(onError, token.lineNumber,
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"h" + (prevLevel + 1), "h" + level);
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}
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prevLevel = level;
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});
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}
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};
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