Convert markdownlint library to an ECMAScript module, replace markdownlint-micromark with micromark, stop publishing (large) markdownlint-browser.js, see https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c for guidance.

lib/md010.mjs

@@ -0,0 +1,78 @@
+// @ts-check
+
+import { addError, hasOverlap } from "../helpers/helpers.cjs";
+import { getDescendantsByType } from "../helpers/micromark-helpers.cjs";
+import { filterByTypesCached } from "./cache.mjs";
+
+const tabRe = /\t+/g;
+
+/** @type {import("./markdownlint.mjs").Rule} */
+export default {
+  "names": [ "MD010", "no-hard-tabs" ],
+  "description": "Hard tabs",
+  "tags": [ "whitespace", "hard_tab" ],
+  "parser": "micromark",
+  "function": function MD010(params, onError) {
+    const codeBlocks = params.config.code_blocks;
+    const includeCode = (codeBlocks === undefined) ? true : !!codeBlocks;
+    const ignoreCodeLanguages = new Set(
+      (params.config.ignore_code_languages || [])
+        .map((language) => language.toLowerCase())
+    );
+    const spacesPerTab = params.config.spaces_per_tab;
+    const spaceMultiplier = (spacesPerTab === undefined) ?
+      1 :
+      Math.max(0, Number(spacesPerTab));
+    /** @type {import("../helpers/micromark-helpers.cjs").TokenType[]} */
+    const exclusionTypes = [];
+    if (includeCode) {
+      if (ignoreCodeLanguages.size > 0) {
+        exclusionTypes.push("codeFenced");
+      }
+    } else {
+      exclusionTypes.push("codeFenced", "codeIndented", "codeText");
+    }
+    const codeTokens = filterByTypesCached(exclusionTypes).filter((token) => {
+      if ((token.type === "codeFenced") && (ignoreCodeLanguages.size > 0)) {
+        const fenceInfos = getDescendantsByType(token, [ "codeFencedFence", "codeFencedFenceInfo" ]);
+        return fenceInfos.every((fenceInfo) => ignoreCodeLanguages.has(fenceInfo.text.toLowerCase()));
+      }
+      return true;
+    });
+    const codeRanges = codeTokens.map((token) => {
+      const { type, startLine, startColumn, endLine, endColumn } = token;
+      const codeFenced = (type === "codeFenced");
+      return {
+        "startLine": startLine + (codeFenced ? 1 : 0),
+        "startColumn": codeFenced ? 0 : startColumn,
+        "endLine": endLine - (codeFenced ? 1 : 0),
+        "endColumn": codeFenced ? Number.MAX_SAFE_INTEGER : endColumn
+      };
+    });
+    for (let lineIndex = 0; lineIndex < params.lines.length; lineIndex++) {
+      const line = params.lines[lineIndex];
+      let match = null;
+      while ((match = tabRe.exec(line)) !== null) {
+        const lineNumber = lineIndex + 1;
+        const column = match.index + 1;
+        const length = match[0].length;
+        /** @type {import("../helpers/helpers.cjs").FileRange} */
+        const range = { "startLine": lineNumber, "startColumn": column, "endLine": lineNumber, "endColumn": column + length - 1 };
+        if (!codeRanges.some((codeRange) => hasOverlap(codeRange, range))) {
+          addError(
+            onError,
+            lineNumber,
+            "Column: " + column,
+            undefined,
+            [ column, length ],
+            {
+              "editColumn": column,
+              "deleteCount": length,
+              "insertText": "".padEnd(length * spaceMultiplier)
+            }
+          );
+        }
+      }
+    }
+  }
+};