Complete rewrite of widget, ES6 style

.babelrc

@@ -0,0 +1,14 @@
+{
+    "presets": [
+        "stage-1",
+        ["env", {
+            "modules": false
+        }]
+    ],
+    "plugins": [
+        ["transform-runtime", {
+            "polyfill": false,
+            "regenerator": true
+        }]
+    ]
+}

.editorconfig

@@ -0,0 +1,12 @@
+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false

.eslintignore

@@ -0,0 +1,3 @@
+webpack.config.js
+Gulpfile.js
+build/**/*

.eslintrc

@@ -0,0 +1,139 @@
+{
+    "extends": ["eslint:recommended"],
+    "env": {
+        "amd": true,
+        "browser": true
+    },
+    "plugins": [],
+    "parserOptions": {
+        "ecmaVersion": 8,
+        "sourceType": "module",
+        "ecmaFeatures": {
+            "globalReturn": true
+        }
+    },
+    "globals": {
+        "mendix": true,
+        "mx": true,
+        "logger": true,
+        "mxui": true,
+        "config": true
+    },
+    "rules": {
+        "comma-dangle": [1,"always-multiline"],
+        "no-cond-assign": [2,"except-parens"],
+        "no-console": 0,
+        "no-constant-condition": 1,
+        "no-control-regex": 1,
+        "no-debugger": 2,
+        "no-dupe-args": 2,
+        "no-dupe-keys": 2,
+        "no-duplicate-case": 2,
+        "no-empty-character-class": 2,
+        "no-empty": 1,
+        "no-ex-assign": 2,
+        "no-extra-boolean-cast": 1,
+        "no-extra-parens": [1,"all"],
+        "no-extra-semi": 1,
+        "no-func-assign": 2,
+        "no-inner-declarations": [2,"both"],
+        "no-invalid-regexp": 2,
+        "no-irregular-whitespace": 2,
+        "no-obj-calls": 2,
+        "no-regex-spaces": 1,
+        "no-sparse-arrays": 2,
+        "no-unreachable": 2,
+        "use-isnan": 2,
+        "valid-typeof": 2,
+        "no-unexpected-multiline": 2,
+        "accessor-pairs": [1,{"getWithoutSet":true,"setWithoutGet":true}],
+        "block-scoped-var": 2,
+        "consistent-return": 1,
+        "curly": ["error", "all"],
+        "default-case": 1,
+        "dot-notation": 2,
+        "dot-location": [1,"property"],
+        "eqeqeq": [2,"smart"],
+        "guard-for-in": 1,
+        "no-alert": 2,
+        "no-caller": 2,
+        "no-div-regex": 2,
+        "no-else-return": 1,
+        "no-eq-null": 2,
+        "no-eval": 2,
+        "no-extend-native": 2,
+        "no-extra-bind": 1,
+        "no-fallthrough": 1,
+        "no-floating-decimal": 2,
+        "no-implied-eval": 2,
+        "no-invalid-this": 1,
+        "no-iterator": 1,
+        "no-labels": 2,
+        "no-lone-blocks": 2,
+        "no-loop-func": 2,
+        "no-multi-spaces": 1,
+        "no-multi-str": 1,
+        "no-native-reassign": 2,
+        "no-new-func": 2,
+        "no-new-wrappers": 2,
+        "no-new": 1,
+        "no-octal-escape": 2,
+        "no-octal": 2,
+        "no-param-reassign": [2,{"props":true}],
+        "no-process-env": 0,
+        "no-proto": 2,
+        "no-redeclare": [2,{"builtinGlobals":true}],
+        "no-return-assign": [2,"always"],
+        "no-script-url": 2,
+        "no-self-compare": 1,
+        "no-sequences": 2,
+        "no-throw-literal": 2,
+        "no-useless-call": 2,
+        "no-with": 2,
+        "radix": 1,
+        "wrap-iife": [2,"inside"],
+        "yoda": [1,"always",{}],
+        "strict": [1,"global"],
+        "no-catch-shadow": 2,
+        "no-delete-var": 2,
+        "no-label-var": 2,
+        "no-shadow-restricted-names": 2,
+        "no-shadow": [2,{"builtinGlobals":true,"hoist":"all"}],
+        "no-undef-init": 2,
+        "no-undef": 2,
+        "no-undefined": 2,
+        "no-unused-vars": 2,
+        "no-use-before-define": [2,"nofunc"],
+        "brace-style": [1,"1tbs",{"allowSingleLine":true}],
+        "camelcase": [1,{"properties":"always"}],
+        "comma-spacing": [1,{"after":true}],
+        "comma-style": 1,
+        "computed-property-spacing": [2,"always"],
+        "eol-last": 1,
+        "indent": [1,4],
+        "key-spacing": [1,{"mode":"minimum"}],
+        "new-parens": 2,
+        "no-lonely-if": 1,
+        "no-mixed-spaces-and-tabs": [2,"smart-tabs"],
+        "no-multiple-empty-lines": [1,{"max":4}],
+        "no-new-object": 2,
+        "no-spaced-func": 2,
+        "no-trailing-spaces": 2,
+        "no-unneeded-ternary": 1,
+        "semi": [2,"always"],
+        "space-infix-ops": 1,
+        "arrow-parens": [2,"as-needed"],
+        "arrow-spacing": [2,{"before":true,"after":true}],
+        "constructor-super": 1,
+        "no-class-assign": 2,
+        "no-const-assign": 2,
+        "no-this-before-super": 2,
+        "no-var": 1,
+        "prefer-const": 1,
+        "prefer-spread": 2,
+        "prefer-reflect": 0,
+        "require-yield": 1,
+        "max-len": [1,140,4,{}],
+        "max-statements": [1,60]
+    }
+}

.gitignore

@@ -11,10 +11,12 @@ test/.project
 *.lock
 .idea/
 
-dist/
+build/
 
 node_modules/
-.editorconfig
+
 *DS_Store*
 .vscode/
 *.bak
+
+yarn-error.log