Refactor code-style

Author: wooorm

index.js

@@ -1,35 +1,32 @@
 import {location} from 'vfile-location'
 
-var search = /\r?\n|\r/g
+const search = /\r?\n|\r/g
 
 /**
  * @param {import('unist').Node|import('unist').Position} value Value to get
  * @param {import('vfile').VFile|import('vfile').VFileValue} file File in which `value` exists
  * @returns {string|null}
  */
 export function source(value, file) {
-  var doc = String(file)
-  var loc = location(file)
+  const doc = String(file)
+  const loc = location(file)
   /** @type {import('unist').Position} */
-  // @ts-ignore Looks like a node.
-  var position = (value && value.position) || value || {}
-  var startOffset = loc.toOffset(position.start)
-  var endOffset = loc.toOffset(position.end)
-  /** @type {Array.<string>} */
-  var results = []
-  /** @type {RegExpMatchArray} */
-  var match
-  /** @type {number} */
-  var end
+  // @ts-expect-error Looks like a node.
+  const position = (value && value.position) || value || {}
+  const endOffset = loc.toOffset(position.end)
+  let startOffset = loc.toOffset(position.start)
 
-  if (startOffset === -1 || endOffset === -1) {
+  if (endOffset === -1 || startOffset === -1) {
     return null
   }
 
+  /** @type {Array.<string>} */
+  const results = []
+
   while (startOffset < endOffset) {
     search.lastIndex = startOffset
-    match = search.exec(doc)
-    end = match && match.index < endOffset ? match.index : endOffset
+    const match = search.exec(doc)
+    const end = match && match.index < endOffset ? match.index : endOffset
     results.push(doc.slice(startOffset, end))
     startOffset = end
 

package.json

@@ -65,11 +65,7 @@
     "trailingComma": "none"
   },
   "xo": {
-    "prettier": true,
-    "rules": {
-      "no-var": "off",
-      "prefer-arrow-callback": "off"
-    }
+    "prettier": true
   },
   "remarkConfig": {
     "plugins": [

readme.md

@@ -33,13 +33,13 @@ Say we have the following file, `example.md`:
 And our script, `example.js`, looks as follows:
 
 ```js
-import {toVFile} from 'to-vfile'
-import unified from 'unified'
+import {readSync} from 'to-vfile'
+import {unified} from 'unified'
 import remarkParse from 'remark-parse'
 import {source} from 'unist-util-source'
 
-var file = toVFile.readSync('example.md')
-var tree = unified()
+const file = readSync('example.md')
+const tree = unified()
   .use(remarkParse)
   .parse(file)
 

test.js

@@ -10,11 +10,11 @@ import remark from 'remark'
 import {VFile} from 'vfile'
 import {source} from './index.js'
 
-test('unist-util-source', function (t) {
-  var file = new VFile('> + **[Hello](./example)**\n> world.')
+test('unist-util-source', (t) => {
+  let file = new VFile('> + **[Hello](./example)**\n> world.')
   /** @type {Node} */
   // @ts-expect-error: hush.
-  var node = remark().parse(file)
+  let node = remark().parse(file)
 
   t.equal(source(node, file), '> + **[Hello](./example)**\n> world.', 'root')