Clean up code

lib/parser.js

@@ -7,6 +7,11 @@ let AtRule = require('./at-rule')
 let Root = require('./root')
 let Rule = require('./rule')
 
+const SAFE_COMMENT_NEIGHBOR = {
+  empty: true,
+  space: true
+}
+
 class Parser {
   constructor(input) {
     this.input = input
@@ -418,9 +423,9 @@ class Parser {
       if (type === 'space' && i === length - 1 && !customProperty) {
         clean = false
       } else if (type === 'comment') {
-        prev = tokens[i - 1]
-        next = tokens[i + 1]
-        if (prev && next && prev[0] !== 'space' && next[0] !== 'space') {
+        prev = tokens[i - 1] ? tokens[i - 1][0] : 'empty'
+        next = tokens[i + 1] ? tokens[i + 1][0] : 'empty'
+        if (!SAFE_COMMENT_NEIGHBOR[prev] && !SAFE_COMMENT_NEIGHBOR[next]) {
           value += token[1]
         } else {
           clean = false

package.json

@@ -131,7 +131,7 @@
   "size-limit": [
     {
       "path": "lib/postcss.js",
-      "limit": "16 KB"
+      "limit": "17 KB"
     }
   ],
   "eslintConfig": {