Improves linting

.jshintrc

@@ -1,4 +1,5 @@
 {
+    "esversion": 6,
     "eqeqeq": true,
     "curly": true,
     "strict": false,
@@ -8,7 +9,6 @@
     "undef": true,
     "unused": true,
     "indent": 4,
-
     "eqnull": true,
     "expr": true,
     "newcap": false,
@@ -16,18 +16,9 @@
     "bitwise": false,
 
     "browser": true,
+    "jasmine": true,
 
     "globals": {
-        "jasmine": false,
+        "d3": false
-        "describe": false,
-        "beforeEach": false,
-        "beforeAll": false,
-        "it": false,
-        "expect": false,
-        "d3": false,
-        "module": false,
-        "require": false,
-        "define": false
     }
-
 }

Gruntfile.coffee

@@ -8,8 +8,8 @@ module.exports = (grunt) ->
             files: ['src/scss/*.scss']
 
         jshint:
-          c3: 'c3.js'
+          c3: 'src/**/*.js'
-          spec: 'spec/*.js'
+          spec: 'spec/**/*.js'
           options:
             reporter: require('jshint-stylish')
             jshintrc: '.jshintrc'

src/api.region.js

@@ -1,6 +1,5 @@
 import CLASS from './class';
 import { c3_chart_fn } from './core';
-import { getOption } from './util';
 
 c3_chart_fn.regions = function (regions) {
     var $$ = this.internal, config = $$.config;

src/axis.js

@@ -1,7 +1,7 @@
 import CLASS from './class';
-import { inherit, API } from './core'
+import { inherit, API } from './core';
 import { isValue, isFunction, isString, isEmpty } from './util';
-import c3_axis from './c3.axis'
+import c3_axis from './c3.axis';
 
 export default function Axis(owner) {
     API.call(this, owner);

src/class-utils.js

@@ -1,4 +1,4 @@
-import CLASS from './class'
+import CLASS from './class';
 import { c3_chart_internal_fn } from './core';
 
 c3_chart_internal_fn.generateClass = function (prefix, targetId) {

src/core.js

@@ -1,3 +1,4 @@
+import * as d3 from 'd3';
 import Axis from './axis';
 import CLASS from './class';
 import { isValue, isFunction, isString, isUndefined, isDefined, ceil10, asHalfPixel, diffDomain, isEmpty, notEmpty, getOption, hasValue, sanitise, getPathBox } from './util';
@@ -8,8 +9,6 @@ export var c3_chart_fn;
 export var c3_chart_internal_fn;
 export var c3_chart_internal_axis_fn;
 
-var d3 = window.d3 ? window.d3 : typeof require !== 'undefined' ? require("d3") : undefined;
-
 export function API(owner) {
     this.owner = owner;
 }
@@ -50,7 +49,7 @@ function Chart(config) {
 
 function ChartInternal(api) {
     var $$ = this;
-    $$.d3 = d3
+    $$.d3 = d3;
     $$.api = api;
     $$.config = $$.getDefaultConfig();
     $$.data = {};
@@ -1084,4 +1083,3 @@ c3_chart_internal_fn.hasValue = hasValue;
 c3_chart_internal_fn.sanitise = sanitise;
 c3_chart_internal_fn.getPathBox = getPathBox;
 c3_chart_internal_fn.CLASS = CLASS;
-

src/index.js

@@ -1,4 +1,4 @@
-import { c3 } from './core'
+import { c3 } from './core';
 
 import './polyfill';
 
@@ -55,4 +55,4 @@ import './ua';
 import './util';
 import './zoom';
 
-export default c3
+export default c3;

src/title.js

@@ -1,4 +1,3 @@
-import CLASS from './class';
 import { c3_chart_internal_fn } from './core';
 
 c3_chart_internal_fn.initTitle = function () {