Node 4 compat

.babelrc

@@ -0,0 +1,11 @@
+{
+  "presets": [
+    ["env", {
+      "loose": true,
+      "targets": {
+        "browsers": false,
+        "node": 4
+      }
+    }]
+  ]
+}

.gitignore

@@ -1,3 +1,4 @@
 node_modules/
 .nyc_output/
 coverage/
+node4/

index.js

@@ -97,7 +97,7 @@ module.exports = class CachePolicy {
             // The request method is understood by the cache and defined as being cacheable, and
             ('GET' === this._method || 'HEAD' === this._method || ('POST' === this._method && this._hasExplicitExpiration())) &&
             // the response status code is understood by the cache, and
-            understoodStatuses.includes(this._status) &&
+            understoodStatuses.indexOf(this._status) !== -1 &&
             // the "no-store" cache directive does not appear in request or response header fields, and
             !this._rescc['no-store'] &&
             // the "private" response directive does not appear in the response, if the cache is shared, and
@@ -113,7 +113,7 @@ module.exports = class CachePolicy {
                 // contains a public response directive.
                 this._rescc.public || this._rescc['max-age'] || this._rescc['s-maxage'] ||
                 // has a status code that is defined as cacheable by default
-                statusCodeCacheableByDefault.includes(this._status)
+                statusCodeCacheableByDefault.indexOf(this._status) !== -1
             ));
     }
 

package.json

@@ -1,19 +1,24 @@
 {
   "name": "http-cache-semantics",
-  "version": "3.7.1",
+  "version": "3.7.3",
   "description": "Parses Cache-Control and other headers. Helps building correct HTTP caches and proxies",
-  "main": "index.js",
   "repository": "https://github.com/pornel/http-cache-semantics.git",
+  "main": "node4/index.js",
   "scripts": {
-    "test": "mocha"
+    "compile": "babel -d node4/ index.js; babel -d node4/test test",
+    "prepublish": "npm run compile",
+    "test": "npm run compile; mocha node4/test"
   },
   "files": [
+    "node4/index.js",
     "index.js",
     "test"
   ],
   "author": "Kornel Lesiński <kornel@geekhood.net> (https://kornel.ski/)",
   "license": "BSD-2-Clause",
   "devDependencies": {
+    "babel-cli": "^6.24.0",
+    "babel-preset-env": "^1.3.2",
     "mocha": "^3.2.0"
   }
 }