Add @stylistic/eslint-plugin to ESLint configuration.

demo/markdownlint-browser.js

@@ -2540,11 +2540,13 @@ function lintInput(options, synchronous, callback) {
   const config = options.config || { "default": true };
   const configParsers = options.configParsers || null;
   const frontMatter = (options.frontMatter === undefined) ?
-    helpers.frontMatterRe : options.frontMatter;
+    helpers.frontMatterRe :
+    options.frontMatter;
   const handleRuleFailures = !!options.handleRuleFailures;
   const noInlineConfig = !!options.noInlineConfig;
   const resultVersion = (options.resultVersion === undefined) ?
-    3 : options.resultVersion;
+    3 :
+    options.resultVersion;
   const getMarkdownIt = () => {
     const markdownit = __webpack_require__(/*! markdown-it */ "markdown-it");
     const md = markdownit({ "html": true });
@@ -4027,14 +4029,14 @@ module.exports = {
         codeBlock.children,
         [ "codeFlowValue" ]
       );
-      const dollarMatches = codeFlowValues.
+      const dollarMatches = codeFlowValues
-        map((codeFlowValue) => ({
+        .map((codeFlowValue) => ({
           "result": codeFlowValue.text.match(dollarCommandRe),
           "startColumn": codeFlowValue.startColumn,
           "startLine": codeFlowValue.startLine,
           "text": codeFlowValue.text
-        })).
+        }))
-        filter((dollarMatch) => dollarMatch.result);
+        .filter((dollarMatch) => dollarMatch.result);
       if (dollarMatches.length === codeFlowValues.length) {
         for (const dollarMatch of dollarMatches) {
           // @ts-ignore
@@ -4647,9 +4649,9 @@ const { filterByTypesCached } = __webpack_require__(/*! ./cache */ "../lib/cache
 // eslint-disable-next-line jsdoc/valid-types
 /** @type import("./markdownlint").Rule */
 module.exports = {
-  "names": ["MD027", "no-multiple-space-blockquote"],
+  "names": [ "MD027", "no-multiple-space-blockquote" ],
   "description": "Multiple spaces after blockquote symbol",
-  "tags": ["blockquote", "whitespace", "indentation"],
+  "tags": [ "blockquote", "whitespace", "indentation" ],
   "parser": "micromark",
   "function": function MD027(params, onError) {
     for (const token of filterByTypesCached([ "linePrefix" ])) {
@@ -4921,10 +4923,12 @@ const codeFencePrefixRe = /^(.*?)[`~]/;
 function addError(onError, lines, lineNumber, top) {
   const line = lines[lineNumber - 1];
   const [ , prefix ] = line.match(codeFencePrefixRe) || [];
-  const fixInfo = (prefix === undefined) ? null : {
+  const fixInfo = (prefix === undefined) ?
-    "lineNumber": lineNumber + (top ? 0 : 1),
+    null :
-    "insertText": `${prefix.replace(/[^>]/g, " ").trim()}\n`
+    {
-  };
+      "lineNumber": lineNumber + (top ? 0 : 1),
+      "insertText": `${prefix.replace(/[^>]/g, " ").trim()}\n`
+    };
   addErrorContext(
     onError,
     lineNumber,
@@ -5122,8 +5126,6 @@ module.exports = {
           if ((token.type === "literalAutolink") && !inHtmlFlow(token)) {
             // Detect and ignore https://github.com/micromark/micromark/issues/164
             const siblings = token.parent?.children;
-              // Commented-out due to not being able to exercise in test/code coverage
-              // || micromarkTokens;
             const index = siblings?.indexOf(token);
             // @ts-ignore
             const prev = siblings?.at(index - 1);
@@ -5274,8 +5276,8 @@ module.exports = {
     punctuation = String((punctuation === undefined) ? allPunctuation : punctuation);
     const punctuationRe = new RegExp("[" + punctuation + "]$");
     const paragraphTokens =
-      filterByTypesCached([ "paragraph" ]).
+      filterByTypesCached([ "paragraph" ])
-        filter((token) =>
+        .filter((token) =>
           (token.parent?.type === "content") && !token.parent?.parent && (token.children.length === 1)
         );
     for (const paragraphToken of paragraphTokens) {
@@ -5556,10 +5558,12 @@ function addLabelSpaceError(onError, label, labelText, isStart) {
     isStart,
     !isStart,
     range,
-    range ? {
+    range ?
-      "editColumn": range[0],
+      {
-      "deleteCount": range[1]
+        "editColumn": range[0],
-    } : undefined
+        "deleteCount": range[1]
+      } :
+      undefined
   );
 }
 
@@ -5584,8 +5588,8 @@ module.exports = {
   "parser": "micromark",
   "function": function MD039(params, onError) {
     const { definitions } = getReferenceLinkImageData();
-    const labels = filterByTypesCached([ "label" ]).
+    const labels = filterByTypesCached([ "label" ])
-      filter((label) => label.parent?.type === "link");
+      .filter((label) => label.parent?.type === "link");
     for (const label of labels) {
       const labelTexts = filterByTypes(
         label.children,
@@ -5685,9 +5689,9 @@ module.exports = {
   "function": function MD041(params, onError) {
     const level = Number(params.config.level || 1);
     if (!frontMatterHasTitle(params.frontMatterLines, params.config.front_matter_title)) {
-      params.parsers.micromark.tokens.
+      params.parsers.micromark.tokens
-        filter((token) => !nonContentTokens.has(token.type) && !isHtmlFlowComment(token)).
+        .filter((token) => !nonContentTokens.has(token.type) && !isHtmlFlowComment(token))
-        every((token) => {
+        .every((token) => {
           let isError = true;
           if ((token.type === "atxHeading") || (token.type === "setextHeading")) {
             isError = (getHeadingLevel(token) !== level);
@@ -6906,7 +6910,7 @@ module.exports = {
       }
     }
   }
-}
+};
 
 
 /***/ }),

eslint.config.mjs

@@ -1,14 +1,24 @@
 import js from "@eslint/js";
 import eslintPluginJsdoc from "eslint-plugin-jsdoc";
 import eslintPluginNode from "eslint-plugin-n";
-import eslintPluginRegexp from "eslint-plugin-regexp"
+import eslintPluginRegexp from "eslint-plugin-regexp";
+import eslintPluginStylistic from "@stylistic/eslint-plugin";
 import eslintPluginUnicorn from "eslint-plugin-unicorn";
 
 export default [
   js.configs.all,
-  eslintPluginJsdoc.configs['flat/recommended'],
+  eslintPluginJsdoc.configs["flat/recommended"],
   eslintPluginNode.configs["flat/recommended"],
   eslintPluginRegexp.configs["flat/recommended"],
+  eslintPluginStylistic.configs.customize({
+    "arrowParens": true,
+    "braceStyle": "1tbs",
+    "commaDangle": "never",
+    "jsx": false,
+    "quoteProps": "always",
+    "quotes": "double",
+    "semi": true
+  }),
   eslintPluginUnicorn.configs["flat/all"],
   {
     "ignores": [
@@ -27,17 +37,23 @@ export default [
   },
   {
     "languageOptions": {
-      "sourceType": "commonjs",
+      "sourceType": "commonjs"
     },
     "linterOptions": {
       "reportUnusedDisableDirectives": true
     },
     "rules": {
+      "@stylistic/array-bracket-spacing": [ "error", "always" ],
+      "@stylistic/indent": [ "error", 2 ],
+      "@stylistic/indent-binary-ops": [ "off" ],
+      "@stylistic/operator-linebreak": [ "error", "after" ],
+      "@stylistic/padded-blocks": "off",
+      "@stylistic/space-before-function-paren": [ "error", "never" ],
       "capitalized-comments": "off",
       "complexity": "off",
       "func-style": "off",
       "id-length": "off",
-      "jsdoc/tag-lines": [ "error", "never", { "startLines":1 } ],
+      "jsdoc/tag-lines": [ "error", "never", { "startLines": 1 } ],
       "logical-assignment-operators": "off",
       "max-depth": "off",
       "max-lines-per-function": "off",

lib/markdownlint.js

@@ -932,11 +932,13 @@ function lintInput(options, synchronous, callback) {
   const config = options.config || { "default": true };
   const configParsers = options.configParsers || null;
   const frontMatter = (options.frontMatter === undefined) ?
-    helpers.frontMatterRe : options.frontMatter;
+    helpers.frontMatterRe :
+    options.frontMatter;
   const handleRuleFailures = !!options.handleRuleFailures;
   const noInlineConfig = !!options.noInlineConfig;
   const resultVersion = (options.resultVersion === undefined) ?
-    3 : options.resultVersion;
+    3 :
+    options.resultVersion;
   const getMarkdownIt = () => {
     const markdownit = require("markdown-it");
     const md = markdownit({ "html": true });

lib/md014.js

@@ -21,14 +21,14 @@ module.exports = {
         codeBlock.children,
         [ "codeFlowValue" ]
       );
-      const dollarMatches = codeFlowValues.
+      const dollarMatches = codeFlowValues
-        map((codeFlowValue) => ({
+        .map((codeFlowValue) => ({
           "result": codeFlowValue.text.match(dollarCommandRe),
           "startColumn": codeFlowValue.startColumn,
           "startLine": codeFlowValue.startLine,
           "text": codeFlowValue.text
-        })).
+        }))
-        filter((dollarMatch) => dollarMatch.result);
+        .filter((dollarMatch) => dollarMatch.result);
       if (dollarMatches.length === codeFlowValues.length) {
         for (const dollarMatch of dollarMatches) {
           // @ts-ignore

lib/md027.js

@@ -8,9 +8,9 @@ const { filterByTypesCached } = require("./cache");
 // eslint-disable-next-line jsdoc/valid-types
 /** @type import("./markdownlint").Rule */
 module.exports = {
-  "names": ["MD027", "no-multiple-space-blockquote"],
+  "names": [ "MD027", "no-multiple-space-blockquote" ],
   "description": "Multiple spaces after blockquote symbol",
-  "tags": ["blockquote", "whitespace", "indentation"],
+  "tags": [ "blockquote", "whitespace", "indentation" ],
   "parser": "micromark",
   "function": function MD027(params, onError) {
     for (const token of filterByTypesCached([ "linePrefix" ])) {

lib/md031.js

@@ -23,10 +23,12 @@ const codeFencePrefixRe = /^(.*?)[`~]/;
 function addError(onError, lines, lineNumber, top) {
   const line = lines[lineNumber - 1];
   const [ , prefix ] = line.match(codeFencePrefixRe) || [];
-  const fixInfo = (prefix === undefined) ? null : {
+  const fixInfo = (prefix === undefined) ?
-    "lineNumber": lineNumber + (top ? 0 : 1),
+    null :
-    "insertText": `${prefix.replace(/[^>]/g, " ").trim()}\n`
+    {
-  };
+      "lineNumber": lineNumber + (top ? 0 : 1),
+      "insertText": `${prefix.replace(/[^>]/g, " ").trim()}\n`
+    };
   addErrorContext(
     onError,
     lineNumber,

lib/md034.js

@@ -21,8 +21,6 @@ module.exports = {
           if ((token.type === "literalAutolink") && !inHtmlFlow(token)) {
             // Detect and ignore https://github.com/micromark/micromark/issues/164
             const siblings = token.parent?.children;
-              // Commented-out due to not being able to exercise in test/code coverage
-              // || micromarkTokens;
             const index = siblings?.indexOf(token);
             // @ts-ignore
             const prev = siblings?.at(index - 1);

lib/md036.js

@@ -25,8 +25,8 @@ module.exports = {
     punctuation = String((punctuation === undefined) ? allPunctuation : punctuation);
     const punctuationRe = new RegExp("[" + punctuation + "]$");
     const paragraphTokens =
-      filterByTypesCached([ "paragraph" ]).
+      filterByTypesCached([ "paragraph" ])
-        filter((token) =>
+        .filter((token) =>
           (token.parent?.type === "content") && !token.parent?.parent && (token.children.length === 1)
         );
     for (const paragraphToken of paragraphTokens) {

lib/md039.js

@@ -29,10 +29,12 @@ function addLabelSpaceError(onError, label, labelText, isStart) {
     isStart,
     !isStart,
     range,
-    range ? {
+    range ?
-      "editColumn": range[0],
+      {
-      "deleteCount": range[1]
+        "editColumn": range[0],
-    } : undefined
+        "deleteCount": range[1]
+      } :
+      undefined
   );
 }
 
@@ -57,8 +59,8 @@ module.exports = {
   "parser": "micromark",
   "function": function MD039(params, onError) {
     const { definitions } = getReferenceLinkImageData();
-    const labels = filterByTypesCached([ "label" ]).
+    const labels = filterByTypesCached([ "label" ])
-      filter((label) => label.parent?.type === "link");
+      .filter((label) => label.parent?.type === "link");
     for (const label of labels) {
       const labelTexts = filterByTypes(
         label.children,

lib/md041.js

@@ -16,9 +16,9 @@ module.exports = {
   "function": function MD041(params, onError) {
     const level = Number(params.config.level || 1);
     if (!frontMatterHasTitle(params.frontMatterLines, params.config.front_matter_title)) {
-      params.parsers.micromark.tokens.
+      params.parsers.micromark.tokens
-        filter((token) => !nonContentTokens.has(token.type) && !isHtmlFlowComment(token)).
+        .filter((token) => !nonContentTokens.has(token.type) && !isHtmlFlowComment(token))
-        every((token) => {
+        .every((token) => {
           let isError = true;
           if ((token.type === "atxHeading") || (token.type === "setextHeading")) {
             isError = (getHeadingLevel(token) !== level);

lib/md056.js

@@ -53,4 +53,4 @@ module.exports = {
       }
     }
   }
-}
+};

package.json

@@ -70,6 +70,7 @@
   },
   "devDependencies": {
     "@eslint/js": "9.9.1",
+    "@stylistic/eslint-plugin": "2.7.2",
     "ajv": "8.17.1",
     "ava": "6.1.3",
     "c8": "10.1.2",

schema/build-config-schema.js

@@ -529,7 +529,7 @@ for (const rule of rules) {
           "description": "Allow URLs as inline links",
           "type": "boolean",
           "default": true
-        },
+        }
       };
       break;
     case "MD055":

test/markdownlint-test-micromark.mjs

@@ -77,8 +77,8 @@ test("filterByTypes, htmlFlow false", async(t) => {
   // Not using flat tokens
   t.deepEqual(
     filtered,
-    filterByTypes([ ...tokens], types)
+    filterByTypes([ ...tokens ], types)
-  )
+  );
 });
 
 test("filterByTypes, htmlFlow true", async(t) => {
@@ -95,8 +95,8 @@ test("filterByTypes, htmlFlow true", async(t) => {
   // Not using flat tokens
   t.deepEqual(
     filtered,
-    filterByTypes([ ...tokens], types, true)
+    filterByTypes([ ...tokens ], types, true)
-  )
+  );
 });
 
 test("filterByPredicate/filterByTypes", async(t) => {

test/markdownlint-test-parallel.js

@@ -23,7 +23,7 @@ function markdownlintParallel(options) {
       const workerData = {
         ...options,
         "files": files.slice(i * chunkSize, (i + 1) * chunkSize)
-      }
+      };
       const worker = new Worker(__filename.replace(/parallel\.js$/, "worker.js"), { workerData });
       worker.on("message", resolve);
       worker.on("error", reject);

test/markdownlint-test-repos.js

@@ -33,8 +33,8 @@ async function lintTestRepo(t, globPatterns, configPath, parallel) {
     // eslint-disable-next-line no-console
     console.log(`${t.title}: Linting ${files.length} files...`);
     const config = Object.fromEntries(
-      Object.entries(rawConfig).
+      Object.entries(rawConfig)
-        map(([ k, v ]) => [
+        .map(([ k, v ]) => [
           k.replace(/header/, "heading"),
           v
         ])

test/markdownlint-test-result-object.js

@@ -64,8 +64,8 @@ test("resultFormattingV0", (t) => new Promise((resolve) => {
       "./test/atx_heading_spacing.md: 1: MD041" +
       " First line in a file should be a top-level heading\n" +
       "./test/first_heading_bad_atx.md: 1: MD041" +
-      " First line in a file should be a top-level heading"
+      " First line in a file should be a top-level heading";
-      t.is(actualMessage, expectedMessage, "Incorrect message (name).");
+    t.is(actualMessage, expectedMessage, "Incorrect message (name).");
     // @ts-ignore
     actualMessage = actualResult.toString(true);
     expectedMessage =
@@ -78,8 +78,8 @@ test("resultFormattingV0", (t) => new Promise((resolve) => {
       "./test/atx_heading_spacing.md: 1: first-line-heading" +
       " First line in a file should be a top-level heading\n" +
       "./test/first_heading_bad_atx.md: 1: first-line-heading" +
-      " First line in a file should be a top-level heading"
+      " First line in a file should be a top-level heading";
-      t.is(actualMessage, expectedMessage, "Incorrect message (alias).");
+    t.is(actualMessage, expectedMessage, "Incorrect message (alias).");
     resolve();
   });
 }));
@@ -121,7 +121,7 @@ test("resultFormattingSyncV0", (t) => {
     "./test/atx_heading_spacing.md: 1: MD041" +
     " First line in a file should be a top-level heading\n" +
     "./test/first_heading_bad_atx.md: 1: MD041" +
-    " First line in a file should be a top-level heading"
+    " First line in a file should be a top-level heading";
   t.is(actualMessage, expectedMessage, "Incorrect message (name).");
   // @ts-ignore
   actualMessage = actualResult.toString(true);
@@ -135,7 +135,7 @@ test("resultFormattingSyncV0", (t) => {
     "./test/atx_heading_spacing.md: 1: first-line-heading" +
     " First line in a file should be a top-level heading\n" +
     "./test/first_heading_bad_atx.md: 1: first-line-heading" +
-    " First line in a file should be a top-level heading"
+    " First line in a file should be a top-level heading";
   t.is(actualMessage, expectedMessage, "Incorrect message (alias).");
 });
 

test/markdownlint-test-worker.js

@@ -8,9 +8,9 @@ const markdownlint = require("../lib/markdownlint").promises.markdownlint;
 // eslint-disable-next-line unicorn/prefer-top-level-await
 markdownlint(workerData).then((lintResults) => {
   // @ts-ignore
-  parentPort.
+  parentPort
     // eslint-disable-next-line unicorn/require-post-message-target-origin
-    postMessage(lintResults);
+    .postMessage(lintResults);
   // eslint-disable-next-line n/no-process-exit
   process.exit();
 });

test/rules/any-blockquote.js

@@ -13,8 +13,8 @@ module.exports = {
   "tags": [ "test" ],
   "parser": "markdownit",
   "function": (params, onError) => {
-    const blockquotes = params.parsers.markdownit.tokens.
+    const blockquotes = params.parsers.markdownit.tokens
-      filter((token => token.type === "blockquote_open"));
+      .filter(((token) => token.type === "blockquote_open"));
     for (const blockquote of blockquotes) {
       const lines = blockquote.map[1] - blockquote.map[0];
       onError({

test/rules/lint-javascript.js

@@ -14,8 +14,8 @@ module.exports = {
   "tags": [ "test", "lint", "javascript" ],
   "parser": "markdownit",
   "function": (params, onError) => {
-    const fences = params.parsers.markdownit.tokens.
+    const fences = params.parsers.markdownit.tokens
-      filter((token => token.type === "fence"));
+      .filter(((token) => token.type === "fence"));
     for (const fence of fences) {
       if (languageJavaScript.test(fence.info)) {
         const results = linter.verify(fence.content, js.configs.recommended);

test/rules/validate-json.js

@@ -12,8 +12,8 @@ module.exports = {
   "parser": "markdownit",
   "asynchronous": true,
   "function": (params, onError) => {
-    const fences = params.parsers.markdownit.tokens.
+    const fences = params.parsers.markdownit.tokens
-      filter((token => token.type === "fence"));
+      .filter(((token) => token.type === "fence"));
     for (const fence of fences) {
       if (/jsonc?/i.test(fence.info)) {
         const errors = [];