Refactor code-style

Author: wooorm

index.js

@@ -1,15 +1,13 @@
 import matters from 'micromark-extension-frontmatter/lib/matters.js'
 
 export function frontmatterFromMarkdown(options) {
-  var settings = matters(options)
-  var length = settings.length
-  var index = -1
-  var enter = {}
-  var exit = {}
-  var matter
+  const settings = matters(options)
+  const enter = {}
+  const exit = {}
+  let index = -1
 
-  while (++index < length) {
-    matter = settings[index]
+  while (++index < settings.length) {
+    const matter = settings[index]
     enter[matter.type] = opener(matter)
     exit[matter.type] = close
     exit[matter.type + 'Value'] = value
@@ -27,7 +25,7 @@ function opener(matter) {
 }
 
 function close(token) {
-  var data = this.resume()
+  const data = this.resume()
   // Remove the initial and final eol.
   this.exit(token).value = data.replace(/^(\r?\n|\r)|(\r?\n|\r)$/g, '')
 }
@@ -38,15 +36,13 @@ function value(token) {
 }
 
 export function frontmatterToMarkdown(options) {
-  var unsafe = []
-  var handlers = {}
-  var settings = matters(options)
-  var length = settings.length
-  var index = -1
-  var matter
+  const unsafe = []
+  const handlers = {}
+  const settings = matters(options)
+  let index = -1
 
-  while (++index < length) {
-    matter = settings[index]
+  while (++index < settings.length) {
+    const matter = settings[index]
     handlers[matter.type] = handler(matter)
     unsafe.push({atBreak: true, character: fence(matter, 'open').charAt(0)})
   }
@@ -55,8 +51,8 @@ export function frontmatterToMarkdown(options) {
 }
 
 function handler(matter) {
-  var open = fence(matter, 'open')
-  var close = fence(matter, 'close')
+  const open = fence(matter, 'open')
+  const close = fence(matter, 'close')
 
   return handle
 
@@ -66,14 +62,9 @@ function handler(matter) {
 }
 
 function fence(matter, prop) {
-  var marker
-
-  if (matter.marker) {
-    marker = pick(matter.marker, prop)
-    return marker + marker + marker
-  }
-
-  return pick(matter.fence, prop)
+  return matter.marker
+    ? pick(matter.marker, prop).repeat(3)
+    : pick(matter.fence, prop)
 }
 
 function pick(schema, prop) {

package.json

@@ -61,11 +61,7 @@
     "trailingComma": "none"
   },
   "xo": {
-    "prettier": true,
-    "rules": {
-      "no-var": "off",
-      "prefer-arrow-callback": "off"
-    }
+    "prettier": true
   },
   "remarkConfig": {
     "plugins": [

test.js

@@ -5,11 +5,11 @@ import {removePosition} from 'unist-util-remove-position'
 import frontmatter from 'micromark-extension-frontmatter'
 import {frontmatterFromMarkdown, frontmatterToMarkdown} from './index.js'
 
-var custom = {type: 'custom', marker: {open: '<', close: '>'}}
-var json = {type: 'json', fence: {open: '{', close: '}'}}
-var yamlAnywhere = {type: 'yaml', marker: '-', anywhere: true}
+const custom = {type: 'custom', marker: {open: '<', close: '>'}}
+const json = {type: 'json', fence: {open: '{', close: '}'}}
+const yamlAnywhere = {type: 'yaml', marker: '-', anywhere: true}
 
-test('markdown -> mdast', function (t) {
+test('markdown -> mdast', (t) => {
   t.deepEqual(
     removePosition(
       fromMarkdown('---', {
@@ -277,7 +277,7 @@ test('markdown -> mdast', function (t) {
   t.end()
 })
 
-test('mdast -> markdown', function (t) {
+test('mdast -> markdown', (t) => {
   t.deepEqual(
     toMarkdown(
       {type: 'root', children: [{type: 'yaml', value: ''}]},