fix: post-increment, pre-decrement working on #76

src/util/url.js

@@ -1,6 +1,7 @@
 const resolve = require('resolve-url')
 const splitPathRe = /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^/]+?|)(\.[^./]*|))(?:[/]*)$/
 const urlRe = /^(?:\w+:)?\/\/([^\s.]+\.\S{2}|localhost[:?\d]*)\S*$/
+const _ = require('./underscore')
 
 // https://github.com/jinder/path/blob/master/path.js#L567
 exports.extname = function (path) {
@@ -16,7 +17,7 @@ exports.resolve = function (root, path) {
   if (Object.prototype.toString.call(root) === '[object Array]') {
     root = root[0]
   }
-  if (root && root.charAt(root.length - 1) !== '/') {
+  if (root && _.last(root) !== '/') {
     root += '/'
   }
   return resolve(root, path)