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/md058.mjs

@@ -0,0 +1,57 @@
+// @ts-check
+
+import { addErrorContext, isBlankLine } from "../helpers/helpers.cjs";
+import { getBlockQuotePrefixText } from "../helpers/micromark-helpers.cjs";
+import { filterByTypesCached } from "./cache.mjs";
+
+/** @typedef {import("micromark-extension-gfm-table")} */
+
+/** @type {import("./markdownlint.mjs").Rule} */
+export default {
+  "names": [ "MD058", "blanks-around-tables" ],
+  "description": "Tables should be surrounded by blank lines",
+  "tags": [ "table" ],
+  "parser": "micromark",
+  "function": function MD058(params, onError) {
+    const { lines } = params;
+    const blockQuotePrefixes = filterByTypesCached([ "blockQuotePrefix", "linePrefix" ]);
+
+    // For every table...
+    const tables = filterByTypesCached([ "table" ]);
+    for (const table of tables) {
+
+      // Look for a blank line above the table
+      const firstLineNumber = table.startLine;
+      if (!isBlankLine(lines[firstLineNumber - 2])) {
+        addErrorContext(
+          onError,
+          firstLineNumber,
+          lines[firstLineNumber - 1].trim(),
+          undefined,
+          undefined,
+          undefined,
+          {
+            "insertText": getBlockQuotePrefixText(blockQuotePrefixes, firstLineNumber)
+          }
+        );
+      }
+
+      // Look for a blank line below the table
+      const lastLineNumber = table.endLine;
+      if (!isBlankLine(lines[lastLineNumber])) {
+        addErrorContext(
+          onError,
+          lastLineNumber,
+          lines[lastLineNumber - 1].trim(),
+          undefined,
+          undefined,
+          undefined,
+          {
+            "lineNumber": lastLineNumber + 1,
+            "insertText": getBlockQuotePrefixText(blockQuotePrefixes, lastLineNumber)
+          }
+        );
+      }
+    }
+  }
+};