tell jslint this is node scripts

Gruntfile.js

@@ -75,15 +75,17 @@ module.exports = function (grunt) {
           maxlen: 80,
           indent: 2,
           maxerr: 3,
+          node: true,
           nomen: true
         }
       },
       jio_nodejs_include: {
-        src: ['src/nodejs/include.js'],
+        src: ['src/nodejs/*.js'],
         directives: {
           maxlen: 80,
           indent: 2,
           maxerr: 3,
+          node: true,
           nomen: true
         }
       },

src/nodejs/html5.js

 (function (env) {
   "use strict";
 
-  const process = require("process");
+  var process = require("process");
   env._html5_weakmap = new WeakMap();
 
   function EventTarget() { env._html5_weakmap.set(this, Object.create(null)); }
   EventTarget.prototype.addEventListener = function (type, listener) {
     if (typeof listener !== "function") return;
-    const em = env._html5_weakmap.get(this);
+    var em = env._html5_weakmap.get(this);
     type = "" + type;
     if (em[type]) em[type].push(listener);
     else em[type] = [listener];
   };
   EventTarget.prototype.removeEventListener = function (type, listener) {
     if (typeof listener !== "function") return;
-    const em = env._html5_weakmap.get(this);
+    var em = env._html5_weakmap.get(this);
     var i = 0, listeners = em[type];
     type = "" + type;
     if (listeners) for (; i < listeners.length; ++i) if (listeners[i] === listener) {
@@ -24,7 +24,7 @@
     }
   };
   EventTarget.prototype.dispatchEvent = function (event) {
-    const type = "" + event.type,
+    var type = "" + event.type,
           em = env._html5_weakmap.get(this),
           ontype = "on" + type;
     var i = 0, listeners;
@@ -39,7 +39,7 @@
 
   function Blob(blobParts, options) {
     // https://developer.mozilla.org/en-US/docs/Web/API/Blob
-    var i = 0; const priv = {}, buffers = [];
+    var i = 0; var priv = {}, buffers = [];
     env._html5_weakmap.set(this, priv);
     for (; i < blobParts.length; ++i) {
       if (Buffer.isBuffer(blobParts[i])) {
@@ -67,27 +67,27 @@
   FileReader.prototype = Object.create(EventTarget.prototype);
   Object.defineProperty(FileReader, "constructor", {value: FileReader});
   FileReader.prototype.readAsText = function (blob) {
-    const priv = env._html5_weakmap.get(blob);
-    const text = priv.data.toString();
-    const event = Object.freeze({type: "load", target: this});
+    var priv = env._html5_weakmap.get(blob);
+    var text = priv.data.toString();
+    var event = Object.freeze({type: "load", target: this});
     process.nextTick(() => {
       this.result = text;
       this.dispatchEvent(event);
     });
   };
   FileReader.prototype.readAsArrayBuffer = function (blob) {
-    const priv = env._html5_weakmap.get(blob);
-    const arrayBuffer = new Uint8Array(priv.data).buffer;
-    const event = Object.freeze({type: "load", target: this});
+    var priv = env._html5_weakmap.get(blob);
+    var arrayBuffer = new Uint8Array(priv.data).buffer;
+    var event = Object.freeze({type: "load", target: this});
     process.nextTick(() => {
       this.result = arrayBuffer;
       this.dispatchEvent(event);
     });
   };
   FileReader.prototype.readAsDataURL = function (blob) {
-    const priv = env._html5_weakmap.get(blob);
-    const dataUrl = "data:" + blob.type + ";base64," + priv.data.toString("base64");
-    const event = Object.freeze({type: "load", target: this});
+    var priv = env._html5_weakmap.get(blob);
+    var dataUrl = "data:" + blob.type + ";base64," + priv.data.toString("base64");
+    var event = Object.freeze({type: "load", target: this});
     process.nextTick(() => {
       this.result = dataUrl;
       this.dispatchEvent(event);