standard: more tweaks & simplify eslint config

.eslintrc.yml

@@ -1,3 +1,5 @@
+extends: standard
+
 env:
   es6: true
   node: true
@@ -14,153 +16,13 @@ overrides:
       no-restricted-globals: [ 2, require, __dirname ]
 
 ignorePatterns:
-  - coverage/
   - demo/
   - dist/
-  - node_modules
   - benchmark/extra/
 
 rules:
-  no-var: 2
-  prefer-const: 2
-  no-const-assign: 2
-  accessor-pairs:         2
-  array-bracket-spacing:  [ 2, never ]
-  block-scoped-var:       2
-  block-spacing:          2
-  brace-style:            [ 2, '1tbs', { allowSingleLine: true } ]
-  # Postponed
-  #callback-return:        2
-  comma-dangle:           2
-  comma-spacing:          2
-  comma-style:            2
-  computed-property-spacing: [ 2, never ]
-  consistent-this:        [ 2, self ]
-  consistent-return:      2
-  # ? change to multi
-  curly:                  [ 2, 'multi-line' ]
-  dot-notation:           2
-  eol-last:               2
-  eqeqeq:                 2
-  func-style:             [ 2, declaration ]
-  # Postponed
-  #global-require:         2
-  guard-for-in:           2
-  handle-callback-err:    2
-
-  indent:                 [ 2, 2, { VariableDeclarator: { var: 2, let: 2, const: 3 }, SwitchCase: 1, ignoreComments: true } ]
-
-  # key-spacing:            [ 2, { "align": "value" } ]
-  keyword-spacing:        2
-  linebreak-style:        2
-  max-depth:              [ 1, 6 ]
-  max-nested-callbacks:   [ 1, 4 ]
-  # string can exceed 80 chars, but should not overflow github website :)
-  max-len:                [ 2, 120, 1000 ]
-  new-cap:                2
-  new-parens:             2
-  # Postponed
-  #newline-after-var:      2
-  no-alert:               2
-  no-array-constructor:   2
-  no-bitwise:             2
-  no-caller:              2
-  #no-case-declarations:   2
-  no-catch-shadow:        2
-  no-cond-assign:         2
-  no-console:             1
-  no-constant-condition:  2
-  #no-control-regex:       2
-  no-debugger:            2
-  no-delete-var:          2
-  no-div-regex:           2
-  no-dupe-args:           2
-  no-dupe-keys:           2
-  no-duplicate-case:      2
-  no-else-return:         2
-  # Tend to drop
-  # no-empty:               1
-  no-empty-character-class: 2
-  no-empty-pattern:       2
-  no-eq-null:             2
-  no-eval:                2
-  no-ex-assign:           2
-  no-extend-native:       2
-  no-extra-bind:          2
-  no-extra-boolean-cast:  2
-  no-extra-semi:          2
-  no-fallthrough:         2
-  no-floating-decimal:    2
-  no-func-assign:         2
-  # Postponed
-  #no-implicit-coercion:   [2, { "boolean": true, "number": true, "string": true } ]
-  no-implied-eval:        2
-  no-inner-declarations:  2
-  no-invalid-regexp:      2
-  no-irregular-whitespace: 2
-  no-iterator:            2
-  no-label-var:           2
-  no-labels:              2
-  no-lone-blocks:         2
-  no-lonely-if:           2
-  no-loop-func:           2
-  no-mixed-requires:      2
-  no-mixed-spaces-and-tabs: 2
-  # Postponed
-  #no-native-reassign:     2
-  no-negated-in-lhs:      2
-  # Postponed
-  #no-nested-ternary:      2
-  no-new:                 2
-  no-new-func:            2
-  no-new-object:          2
-  no-new-require:         2
-  no-new-wrappers:        2
-  no-obj-calls:           2
-  no-octal:               2
-  no-octal-escape:        2
-  no-path-concat:         2
-  no-proto:               2
-  no-redeclare:           2
-  # Postponed
-  #no-regex-spaces:        2
-  no-return-assign:       2
-  no-self-compare:        2
-  no-sequences:           2
-  no-shadow:              2
-  no-shadow-restricted-names: 2
-  no-sparse-arrays:       2
-  no-trailing-spaces:     2
-  no-undef:               2
-  no-undef-init:          2
-  no-undefined:           2
-  no-unexpected-multiline: 2
-  no-unreachable:         2
-  no-unused-expressions:  2
-  no-unused-vars:         2
-  no-use-before-define:   2
-  no-void:                2
-  no-with:                2
-  object-curly-spacing:   [ 2, always, { "objectsInObjects": true, "arraysInObjects": true } ]
-  one-var:                [ 2, { initialized: 'never' } ]
-  operator-assignment:    1
-  # Postponed
-  #operator-linebreak:     [ 2, after ]
-  semi:                   [ 2, never ]
-  semi-spacing:           2
-  space-before-function-paren: [2, always]
-  space-in-parens:        [ 2, never ]
-  space-infix-ops:        2
-  space-unary-ops:        2
-  # Postponed
-  spaced-comment:         [ 2, 'always', {
-      line: { markers: ['*package', '!', '/', ',', '='] },
-      block: { balanced: true, markers: ['*package', '!', ',', ':', '::', 'flow-include'], exceptions: ['*'] }
-    }]
-  strict:                 [ 2, global ]
-  quotes:                 [ 2, single, avoid-escape ]
-  quote-props:            [ 1, 'as-needed' ]
-  radix:                  2
-  use-isnan:              2
-  valid-typeof:           2
-  yoda:                   [ 2, never, { "exceptRange": true } ]
+  camelcase: 0
+  key-spacing: 0
+  no-multi-spaces: 0
+  no-multiple-empty-lines: 0
+  padded-blocks: 0

benchmark/benchmark.mjs

@@ -16,10 +16,7 @@ for (const name of fs.readdirSync(new URL('./implementations', import.meta.url))
   const filepath = new URL(`./implementations/${name}/index.mjs`, import.meta.url)
   const code = (await import(filepath))
 
-  IMPLS.push({
-    name: name,
-    code: code
-  })
+  IMPLS.push({ name, code })
 }
 
 const SAMPLES = []
@@ -39,7 +36,7 @@ fs.readdirSync(new URL('./samples', import.meta.url)).sort().forEach(sample => {
     title,
     {
       onStart: () => { console.log('\nSample: %s %s', sample, title) },
-      onComplete: onComplete
+      onComplete
     }
   )
 
@@ -52,18 +49,13 @@ fs.readdirSync(new URL('./samples', import.meta.url)).sort().forEach(sample => {
           cursor.eraseLine()
           cursor.write(' > ' + event.target)
         },
-        onComplete: onComplete,
+        onComplete,
         fn: function () { impl.code.run(content.string) }
       }
     )
   })
 
-  SAMPLES.push({
-    name: sample.split('.')[0],
-    title: title,
-    content: content,
-    suite: suite
-  })
+  SAMPLES.push({ name: sample.split('.')[0], title, content, suite })
 })
 
 

bin/markdown-it.mjs

@@ -76,7 +76,7 @@ readFile(options.file, 'utf8', function (err, input) {
     }
 
     console.error(
-      options.trace && err.stack ||
+      (options.trace && err.stack) ||
       err.message ||
       String(err))
 
@@ -95,7 +95,7 @@ readFile(options.file, 'utf8', function (err, input) {
 
   } catch (e) {
     console.error(
-      options.trace && e.stack ||
+      (options.trace && e.stack) ||
       e.message ||
       String(e))
 

lib/common/utils.mjs

@@ -73,7 +73,7 @@ function fromCodePoint (c) {
 }
 
 
-const UNESCAPE_MD_RE  = /\\([!"#$%&'()*+,\-.\/:;<=>?@[\\\]^_`{|}~])/g
+const UNESCAPE_MD_RE  = /\\([!"#$%&'()*+,\-./:;<=>?@[\\\]^_`{|}~])/g
 const ENTITY_RE       = /&([a-z#][a-z0-9]{1,31});/gi
 const UNESCAPE_ALL_RE = new RegExp(UNESCAPE_MD_RE.source + '|' + ENTITY_RE.source, 'gi')
 
@@ -82,8 +82,9 @@ const DIGITAL_ENTITY_TEST_RE = /^#((?:x[a-f0-9]{1,8}|[0-9]{1,8}))$/i
 
 function replaceEntityPattern (match, name) {
   if (name.charCodeAt(0) === 0x23/* # */ && DIGITAL_ENTITY_TEST_RE.test(name)) {
-    const code = name[1].toLowerCase() === 'x' ?
-      parseInt(name.slice(2), 16) : parseInt(name.slice(1), 10)
+    const code = name[1].toLowerCase() === 'x'
+      ? parseInt(name.slice(2), 16)
+      : parseInt(name.slice(1), 10)
 
     if (isValidEntityCode(code)) {
       return fromCodePoint(code)

lib/index.mjs

@@ -36,7 +36,7 @@ function validateLink (url) {
   // url should be normalized at this point, and existing entities are decoded
   const str = url.trim().toLowerCase()
 
-  return BAD_PROTO_RE.test(str) ? (GOOD_DATA_RE.test(str) ? true : false) : true
+  return BAD_PROTO_RE.test(str) ? GOOD_DATA_RE.test(str) : true
 }
 
 

lib/renderer.mjs

@@ -72,15 +72,10 @@ default_rules.fence = function (tokens, idx, options, env, slf) {
       attrs: tmpAttrs
     }
 
-    return  '<pre><code' + slf.renderAttrs(tmpToken) + '>'
-          + highlighted
-          + '</code></pre>\n'
+    return `<pre><code${slf.renderAttrs(tmpToken)}>${highlighted}</code></pre>\n`
   }
 
-
-  return  '<pre><code' + slf.renderAttrs(token) + '>'
-        + highlighted
-        + '</code></pre>\n'
+  return `<pre><code${slf.renderAttrs(token)}>${highlighted}</code></pre>\n`
 }
 
 

lib/ruler.mjs

@@ -158,7 +158,7 @@ Ruler.prototype.before = function (beforeName, ruleName, fn, options) {
   this.__rules__.splice(index, 0, {
     name: ruleName,
     enabled: true,
-    fn: fn,
+    fn,
     alt: opt.alt || []
   })
 
@@ -199,7 +199,7 @@ Ruler.prototype.after = function (afterName, ruleName, fn, options) {
   this.__rules__.splice(index + 1, 0, {
     name: ruleName,
     enabled: true,
-    fn: fn,
+    fn,
     alt: opt.alt || []
   })
 
@@ -235,7 +235,7 @@ Ruler.prototype.push = function (ruleName, fn, options) {
   this.__rules__.push({
     name: ruleName,
     enabled: true,
-    fn: fn,
+    fn,
     alt: opt.alt || []
   })
 

lib/rules_block/list.mjs

@@ -90,11 +90,7 @@ function markTightParagraphs (state, idx) {
 
 
 export default function list (state, startLine, endLine, silent) {
-  let max,
-      pos,
-      start,
-      token
-
+  let max, pos, start, token
   let nextLine = startLine
   let tight = true
 

lib/rules_block/reference.mjs

@@ -171,7 +171,7 @@ export default function reference (state, startLine, _endLine, silent) {
     state.env.references = {}
   }
   if (typeof state.env.references[label] === 'undefined') {
-    state.env.references[label] = { title: title, href: href }
+    state.env.references[label] = { title, href }
   }
 
   state.parentType = oldParentType

lib/rules_block/state_block.mjs

@@ -36,8 +36,10 @@ function StateBlock (src, md, env, tokens) {
   this.bsCount = []
 
   // block parser variables
-  this.blkIndent  = 0 // required block content indent (for example, if we are
+
+  // required block content indent (for example, if we are
   // inside a list, it would be positioned after list marker)
+  this.blkIndent  = 0
   this.line       = 0 // line index in src
   this.lineMax    = 0 // lines count
   this.tight      = false  // loose/tight mode for lists

lib/rules_inline/autolink.mjs

@@ -1,8 +1,9 @@
 // Process autolinks '<protocol:...>'
 
 /* eslint max-len:0 */
-const EMAIL_RE    = /^([a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*)$/
-const AUTOLINK_RE = /^([a-zA-Z][a-zA-Z0-9+.\-]{1,31}):([^<>\x00-\x20]*)$/
+const EMAIL_RE    = /^([a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*)$/
+/* eslint-disable-next-line no-control-regex */
+const AUTOLINK_RE = /^([a-zA-Z][a-zA-Z0-9+.-]{1,31}):([^<>\x00-\x20]*)$/
 
 
 export default function autolink (state, silent) {

lib/rules_inline/balance_pairs.mjs

@@ -39,6 +39,7 @@ function processDelimiters (delimiters) {
     // for each marker, each delimiter length modulo 3,
     // and for whether this closer can be an opener;
     // https://github.com/commonmark/cmark/commit/34250e12ccebdc6372b8b49c44fab57c72443460
+    /* eslint-disable-next-line no-prototype-builtins */
     if (!openersBottom.hasOwnProperty(closer.marker)) {
       openersBottom[closer.marker] = [-1, -1, -1, -1, -1, -1]
     }
@@ -78,9 +79,9 @@ function processDelimiters (delimiters) {
           // the entire sequence in future checks. This is required to make
           // sure algorithm has linear complexity (see *_*_*_*_*_... case).
           //
-          const lastJump = openerIdx > 0 && !delimiters[openerIdx - 1].open ?
-            jumps[openerIdx - 1] + 1 :
-            0
+          const lastJump = openerIdx > 0 && !delimiters[openerIdx - 1].open
+            ? jumps[openerIdx - 1] + 1
+            : 0
 
           jumps[closerIdx] = closerIdx - openerIdx + lastJump
           jumps[openerIdx] = lastJump

lib/rules_inline/emphasis.mjs

@@ -20,7 +20,7 @@ function emphasis_tokenize (state, silent) {
     state.delimiters.push({
       // Char code of the starting marker (number).
       //
-      marker: marker,
+      marker,
 
       // Total length of these series of delimiters.
       //

lib/rules_inline/state_inline.mjs

@@ -136,11 +136,7 @@ StateInline.prototype.scanDelims = function (start, canSplitWord) {
     can_close = right_flanking
   }
 
-  return {
-    can_open:  can_open,
-    can_close: can_close,
-    length:    count
-  }
+  return { can_open, can_close, length: count }
 }
 
 

lib/rules_inline/strikethrough.mjs

@@ -30,7 +30,7 @@ function strikethrough_tokenize (state, silent) {
     token.content = ch + ch
 
     state.delimiters.push({
-      marker: marker,
+      marker,
       length: 0,     // disable "rule of 3" length checks meant for emphasis
       token:  state.tokens.length - 1,
       end:    -1,

package.json

@@ -65,6 +65,7 @@
     "c8": "^8.0.1",
     "chai": "^4.2.0",
     "eslint": "^8.4.1",
+    "eslint-config-standard": "^17.1.0",
     "express": "^4.14.0",
     "gh-pages": "^6.1.0",
     "highlight.js": "^11.9.0",

support/demo_template/index.mjs

@@ -37,7 +37,7 @@ defaults.highlight = function (str, lang) {
 
   try {
     if (!defaults._highlight) {
-      throw 'highlighting disabled'
+      throw new Error('highlighting disabled')
     }
 
     if (lang && lang !== 'auto' && hljs.getLanguage(lang)) {
@@ -167,7 +167,7 @@ function updateResult () {
     if (source) {
       // serialize state - source and options
       permalink.href = '#md3=' + mdurl.encode(JSON.stringify({
-        source: source,
+        source,
         defaults: _.omit(defaults, 'highlight')
       }), '-_.!~', false)
     } else {

support/demo_template/rollup.config.mjs

@@ -28,7 +28,7 @@ export default [
       format: 'umd',
       name: 'markdownit'
     },
-    plugins: plugins
+    plugins
   },
   {
     input: 'support/demo_template/index.mjs',
@@ -37,6 +37,6 @@ export default [
       format: 'iife',
       name: 'demo'
     },
-    plugins: plugins
+    plugins
   }
 ]

support/specsplit.mjs

@@ -84,23 +84,18 @@ readFile(options.spec, 'utf8', function (error, input) {
       const html = arr[1].replace(/^\n/, '')
 
       const result = {
-        md:   md,
-        html: html,
+        md,
+        html,
         line: token.map[0],
         err: ''
       }
 
-      try {
       if (markdown.render(md) === normalize(html)) {
         good.push(result)
       } else {
         result.err = markdown.render(md)
         bad.push(result)
       }
-      } catch (___) {
-        // bad.push(result);
-        throw ___
-      }
     })
 
   const out = []

test/babelmark-responder.mjs

@@ -16,7 +16,7 @@ describe('babelmark responder app', function () {
       ['../support/babelmark-responder.mjs'],
       {
         cwd: new URL('.', import.meta.url),
-        env: Object.assign({}, process.env, { PORT: PORT })
+        env: Object.assign({}, process.env, { PORT })
       }
     )
 

test/pathological.mjs

@@ -20,10 +20,10 @@ async function test_pattern (str) {
   try {
     result = await Promise.race([
       worker.render(str),
-      new Promise((_, reject) => setTimeout(() => reject(new Error('Terminated (timeout exceeded)')), 3000).unref())
+      new Promise((resolve, reject) => {
+        setTimeout(() => reject(new Error('Terminated (timeout exceeded)')), 3000).unref()
+      })
     ])
-  } catch (e) {
-    throw e
   } finally {
     ac.abort()
     await worker.end()