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/md054.mjs

@@ -0,0 +1,120 @@
+// @ts-check
+
+import { addErrorContext, nextLinesRe } from "../helpers/helpers.cjs";
+import { getDescendantsByType } from "../helpers/micromark-helpers.cjs";
+import { getReferenceLinkImageData, filterByTypesCached } from "./cache.mjs";
+
+const backslashEscapeRe = /\\([!"#$%&'()*+,\-./:;<=>?@[\\\]^_`{|}~])/g;
+const removeBackslashEscapes = (text) => text.replace(backslashEscapeRe, "$1");
+const autolinkDisallowedRe = /[ <>]/;
+const autolinkAble = (destination) => {
+  try {
+    // eslint-disable-next-line no-new
+    new URL(destination);
+  } catch {
+    // Not an absolute URL
+    return false;
+  }
+  return !autolinkDisallowedRe.test(destination);
+};
+
+/** @type {import("./markdownlint.mjs").Rule} */
+export default {
+  "names": [ "MD054", "link-image-style" ],
+  "description": "Link and image style",
+  "tags": [ "images", "links" ],
+  "parser": "micromark",
+  "function": (params, onError) => {
+    const config = params.config;
+    const autolink = (config.autolink === undefined) || !!config.autolink;
+    const inline = (config.inline === undefined) || !!config.inline;
+    const full = (config.full === undefined) || !!config.full;
+    const collapsed = (config.collapsed === undefined) || !!config.collapsed;
+    const shortcut = (config.shortcut === undefined) || !!config.shortcut;
+    const urlInline = (config.url_inline === undefined) || !!config.url_inline;
+    if (autolink && inline && full && collapsed && shortcut && urlInline) {
+      // Everything allowed, nothing to check
+      return;
+    }
+    const { definitions } = getReferenceLinkImageData();
+    const links = filterByTypesCached([ "autolink", "image", "link" ]);
+    for (const link of links) {
+      let label = null;
+      let destination = null;
+      const {
+        endColumn, endLine, startColumn, startLine, text, type
+      } = link;
+      const image = (type === "image");
+      let isError = false;
+      if (type === "autolink") {
+        // link kind is an autolink
+        destination = getDescendantsByType(link, [ [ "autolinkEmail", "autolinkProtocol" ] ])[0]?.text;
+        label = destination;
+        isError = !autolink && Boolean(destination);
+      } else {
+        // link type is "image" or "link"
+        label = getDescendantsByType(link, [ "label", "labelText" ])[0].text;
+        destination =
+          getDescendantsByType(link, [ "resource", "resourceDestination", [ "resourceDestinationLiteral", "resourceDestinationRaw" ], "resourceDestinationString" ])[0]?.text;
+        if (destination) {
+          // link kind is an inline link
+          const title = getDescendantsByType(link, [ "resource", "resourceTitle", "resourceTitleString" ])[0]?.text;
+          isError = !inline || (
+            !urlInline &&
+            autolink &&
+            !image &&
+            !title &&
+            (label === destination) &&
+            autolinkAble(destination)
+          );
+        } else {
+          // link kind is a full/collapsed/shortcut reference link
+          const isShortcut = getDescendantsByType(link, [ "reference" ]).length === 0;
+          const referenceString = getDescendantsByType(link, [ "reference", "referenceString" ])[0]?.text;
+          const isCollapsed = (referenceString === undefined);
+          const definition = definitions.get(referenceString || label);
+          destination = definition && definition[1];
+          isError = destination &&
+            (isShortcut ? !shortcut : (isCollapsed ? !collapsed : !full));
+        }
+      }
+      if (isError) {
+        let range = undefined;
+        let fixInfo = undefined;
+        if (startLine === endLine) {
+          range = [ startColumn, endColumn - startColumn ];
+          let insertText = null;
+          const canInline = (inline && label);
+          const canAutolink = (autolink && !image && autolinkAble(destination));
+          if (canInline && (urlInline || !canAutolink)) {
+            // Most useful form
+            const prefix = (image ? "!" : "");
+            // @ts-ignore
+            const escapedLabel = label.replace(/[[\]]/g, "\\$&");
+            const escapedDestination = destination.replace(/[()]/g, "\\$&");
+            insertText = `${prefix}[${escapedLabel}](${escapedDestination})`;
+          } else if (canAutolink) {
+            // Simplest form
+            insertText = `<${removeBackslashEscapes(destination)}>`;
+          }
+          if (insertText) {
+            fixInfo = {
+              "editColumn": range[0],
+              insertText,
+              "deleteCount": range[1]
+            };
+          }
+        }
+        addErrorContext(
+          onError,
+          startLine,
+          text.replace(nextLinesRe, ""),
+          undefined,
+          undefined,
+          range,
+          fixInfo
+        );
+      }
+    }
+  }
+};