Removed all instances of Object.assign by using es6 classes, also includes some …

app/assets/javascripts/droplab/drop_down.js

-/* eslint-disable */
-
 import utils from './utils';
 import { SELECTED_CLASS, IGNORE_CLASS } from './constants';
 
-var DropDown = function(list) {
+class DropDown {
+  constructor(list) {
     this.currentIndex = 0;
     this.hidden = true;
     this.list = typeof list === 'string' ? document.querySelector(list) : list;
@@ -16,29 +15,28 @@ var DropDown = function(list) {
     this.addEvents();
 
     this.initialState = list.innerHTML;
-};
+  }
 
-Object.assign(DropDown.prototype, {
-  getItems: function() {
+  getItems() {
     this.items = [].slice.call(this.list.querySelectorAll('li'));
     return this.items;
-  },
+  }
 
-  initTemplateString: function() {
-    var items = this.items || this.getItems();
+  initTemplateString() {
+    const items = this.items || this.getItems();
 
-    var templateString = '';
+    let templateString = '';
     if (items.length > 0) templateString = items[items.length - 1].outerHTML;
     this.templateString = templateString;
 
     return this.templateString;
-  },
+  }
 
-  clickEvent: function(e) {
+  clickEvent(e) {
     if (e.target.tagName === 'UL') return;
     if (e.target.classList.contains(IGNORE_CLASS)) return;
 
-    var selected = utils.closest(e.target, 'LI');
+    const selected = utils.closest(e.target, 'LI');
     if (!selected) return;
 
     this.addSelectedClass(selected);
@@ -46,95 +44,95 @@ Object.assign(DropDown.prototype, {
     e.preventDefault();
     this.hide();
 
-    var listEvent = new CustomEvent('click.dl', {
+    const listEvent = new CustomEvent('click.dl', {
       detail: {
         list: this,
-        selected: selected,
+        selected,
         data: e.target.dataset,
       },
     });
     this.list.dispatchEvent(listEvent);
-  },
+  }
 
-  addSelectedClass: function (selected) {
+  addSelectedClass(selected) {
     this.removeSelectedClasses();
     selected.classList.add(SELECTED_CLASS);
-  },
+  }
 
-  removeSelectedClasses: function () {
+  removeSelectedClasses() {
     const items = this.items || this.getItems();
 
     items.forEach(item => item.classList.remove(SELECTED_CLASS));
-  },
+  }
 
-  addEvents: function() {
-    this.eventWrapper.clickEvent = this.clickEvent.bind(this)
+  addEvents() {
+    this.eventWrapper.clickEvent = this.clickEvent.bind(this);
     this.list.addEventListener('click', this.eventWrapper.clickEvent);
-  },
-
-  toggle: function() {
-    this.hidden ? this.show() : this.hide();
-  },
+  }
 
-  setData: function(data) {
+  setData(data) {
     this.data = data;
     this.render(data);
-  },
+  }
 
-  addData: function(data) {
+  addData(data) {
     this.data = (this.data || []).concat(data);
     this.render(this.data);
-  },
+  }
 
-  render: function(data) {
+  render(data) {
     const children = data ? data.map(this.renderChildren.bind(this)) : [];
     const renderableList = this.list.querySelector('ul[data-dynamic]') || this.list;
 
     renderableList.innerHTML = children.join('');
-  },
+  }
 
-  renderChildren: function(data) {
-    var html = utils.template(this.templateString, data);
-    var template = document.createElement('div');
+  renderChildren(data) {
+    const html = utils.template(this.templateString, data);
+    const template = document.createElement('div');
 
     template.innerHTML = html;
-    this.setImagesSrc(template);
+    DropDown.setImagesSrc(template);
     template.firstChild.style.display = data.droplab_hidden ? 'none' : 'block';
 
     return template.firstChild.outerHTML;
-  },
-
-  setImagesSrc: function(template) {
-    const images = [].slice.call(template.querySelectorAll('img[data-src]'));
-
-    images.forEach((image) => {
-      image.src = image.getAttribute('data-src');
-      image.removeAttribute('data-src');
-    });
-  },
+  }
 
-  show: function() {
+  show() {
     if (!this.hidden) return;
     this.list.style.display = 'block';
     this.currentIndex = 0;
     this.hidden = false;
-  },
+  }
 
-  hide: function() {
+  hide() {
     if (this.hidden) return;
     this.list.style.display = 'none';
     this.currentIndex = 0;
     this.hidden = true;
-  },
+  }
 
-  toggle: function () {
-    this.hidden ? this.show() : this.hide();
-  },
+  toggle() {
+    if (this.hidden) return this.show();
 
-  destroy: function() {
+    return this.hide();
+  }
+
+  destroy() {
     this.hide();
     this.list.removeEventListener('click', this.eventWrapper.clickEvent);
   }
-});
+
+  static setImagesSrc(template) {
+    const images = [...template.querySelectorAll('img[data-src]')];
+
+    images.forEach((image) => {
+      const img = image;
+
+      img.src = img.getAttribute('data-src');
+      img.removeAttribute('data-src');
+    });
+  }
+}
 
 export default DropDown;

app/assets/javascripts/droplab/drop_lab.js

-/* eslint-disable */
-
 import HookButton from './hook_button';
 import HookInput from './hook_input';
 import utils from './utils';
 import Keyboard from './keyboard';
 import { DATA_TRIGGER } from './constants';
 
-var DropLab = function() {
+class DropLab {
+  constructor() {
     this.ready = false;
     this.hooks = [];
     this.queuedData = [];
     this.config = {};
 
     this.eventWrapper = {};
-};
+  }
 
-Object.assign(DropLab.prototype, {
-  loadStatic: function(){
-    var dropdownTriggers = [].slice.apply(document.querySelectorAll(`[${DATA_TRIGGER}]`));
+  loadStatic() {
+    const dropdownTriggers = [].slice.apply(document.querySelectorAll(`[${DATA_TRIGGER}]`));
     this.addHooks(dropdownTriggers);
-  },
+  }
 
-  addData: function () {
-    var args = [].slice.apply(arguments);
-    this.applyArgs(args, '_addData');
-  },
+  addData(...args) {
+    this.applyArgs(args, 'processAddData');
+  }
 
-  setData: function() {
-    var args = [].slice.apply(arguments);
-    this.applyArgs(args, '_setData');
-  },
+  setData(...args) {
+    this.applyArgs(args, 'processSetData');
+  }
 
-  destroy: function() {
+  destroy() {
     this.hooks.forEach(hook => hook.destroy());
     this.hooks = [];
     this.removeEvents();
-  },
+  }
 
-  applyArgs: function(args, methodName) {
-    if (this.ready) return this[methodName].apply(this, args);
+  applyArgs(args, methodName) {
+    if (this.ready) return this[methodName](...args);
 
     this.queuedData = this.queuedData || [];
     this.queuedData.push(args);
-  },
 
-  _addData: function(trigger, data) {
-    this._processData(trigger, data, 'addData');
-  },
+    return this.ready;
+  }
 
-  _setData: function(trigger, data) {
-    this._processData(trigger, data, 'setData');
-  },
+  processAddData(trigger, data) {
+    this.processData(trigger, data, 'addData');
+  }
+
+  processSetData(trigger, data) {
+    this.processData(trigger, data, 'setData');
+  }
 
-  _processData: function(trigger, data, methodName) {
+  processData(trigger, data, methodName) {
     this.hooks.forEach((hook) => {
       if (Array.isArray(trigger)) hook.list[methodName](trigger);
 
       if (hook.trigger.id === trigger) hook.list[methodName](data);
     });
-  },
+  }
 
-  addEvents: function() {
-    this.eventWrapper.documentClicked = this.documentClicked.bind(this)
+  addEvents() {
+    this.eventWrapper.documentClicked = this.documentClicked.bind(this);
     document.addEventListener('click', this.eventWrapper.documentClicked);
-  },
+  }
 
-  documentClicked: function(e) {
+  documentClicked(e) {
     let thisTag = e.target;
 
     if (thisTag.tagName !== 'UL') thisTag = utils.closest(thisTag, 'UL');
-    if (utils.isDropDownParts(thisTag, this.hooks) || utils.isDropDownParts(e.target, this.hooks)) return;
+    if (utils.isDropDownParts(thisTag, this.hooks)) return;
+    if (utils.isDropDownParts(e.target, this.hooks)) return;
 
     this.hooks.forEach(hook => hook.list.hide());
-  },
+  }
 
-  removeEvents: function(){
+  removeEvents() {
     document.removeEventListener('click', this.eventWrapper.documentClicked);
-  },
+  }
 
-  changeHookList: function(trigger, list, plugins, config) {
+  changeHookList(trigger, list, plugins, config) {
     const availableTrigger = typeof trigger === 'string' ? document.getElementById(trigger) : trigger;
 
-
     this.hooks.forEach((hook, i) => {
-      hook.list.list.dataset.dropdownActive = false;
+      const aHook = hook;
 
-      if (hook.trigger !== availableTrigger) return;
+      aHook.list.list.dataset.dropdownActive = false;
 
-      hook.destroy();
+      if (aHook.trigger !== availableTrigger) return;
+
+      aHook.destroy();
       this.hooks.splice(i, 1);
       this.addHook(availableTrigger, list, plugins, config);
     });
-  },
+  }
 
-  addHook: function(hook, list, plugins, config) {
+  addHook(hook, list, plugins, config) {
     const availableHook = typeof hook === 'string' ? document.querySelector(hook) : hook;
     let availableList;
 
@@ -111,18 +111,18 @@ Object.assign(DropLab.prototype, {
     this.hooks.push(new HookObject(availableHook, availableList, plugins, config));
 
     return this;
-  },
+  }
 
-  addHooks: function(hooks, plugins, config) {
+  addHooks(hooks, plugins, config) {
     hooks.forEach(hook => this.addHook(hook, null, plugins, config));
     return this;
-  },
+  }
 
-  setConfig: function(obj){
+  setConfig(obj) {
     this.config = obj;
-  },
+  }
 
-  fireReady: function() {
+  fireReady() {
     const readyEvent = new CustomEvent('ready.dl', {
       detail: {
         dropdown: this,
@@ -131,10 +131,14 @@ Object.assign(DropLab.prototype, {
     document.dispatchEvent(readyEvent);
 
     this.ready = true;
-  },
+  }
 
-  init: function (hook, list, plugins, config) {
-    hook ? this.addHook(hook, list, plugins, config) : this.loadStatic();
+  init(hook, list, plugins, config) {
+    if (hook) {
+      this.addHook(hook, list, plugins, config);
+    } else {
+      this.loadStatic();
+    }
 
     this.addEvents();
 
@@ -146,7 +150,7 @@ Object.assign(DropLab.prototype, {
     this.queuedData = [];
 
     return this;
-  },
-});
+  }
+}
 
 export default DropLab;

app/assets/javascripts/droplab/hook.js

-/* eslint-disable */
-
 import DropDown from './drop_down';
 
-var Hook = function(trigger, list, plugins, config){
+class Hook {
+  constructor(trigger, list, plugins, config) {
     this.trigger = trigger;
     this.list = new DropDown(list);
     this.type = 'Hook';
@@ -10,13 +9,7 @@ var Hook = function(trigger, list, plugins, config){
     this.plugins = plugins || [];
     this.config = config || {};
     this.id = trigger.id;
-};
-
-Object.assign(Hook.prototype, {
-
-  addEvents: function(){},
-
-  constructor: Hook,
-});
+  }
+}
 
 export default Hook;

app/assets/javascripts/droplab/hook_button.js

-/* eslint-disable */
-
 import Hook from './hook';
 
-var HookButton = function(trigger, list, plugins, config) {
-  Hook.call(this, trigger, list, plugins, config);
+class HookButton extends Hook {
+  constructor(trigger, list, plugins, config) {
+    super(trigger, list, plugins, config);
 
     this.type = 'button';
     this.event = 'click';
@@ -12,54 +11,48 @@ var HookButton = function(trigger, list, plugins, config) {
 
     this.addEvents();
     this.addPlugins();
-};
-
-HookButton.prototype = Object.create(Hook.prototype);
+  }
 
-Object.assign(HookButton.prototype, {
-  addPlugins: function() {
+  addPlugins() {
     this.plugins.forEach(plugin => plugin.init(this));
-  },
+  }
 
-  clicked: function(e){
-    var buttonEvent = new CustomEvent('click.dl', {
+  clicked(e) {
+    const buttonEvent = new CustomEvent('click.dl', {
       detail: {
         hook: this,
       },
       bubbles: true,
-      cancelable: true
+      cancelable: true,
     });
     e.target.dispatchEvent(buttonEvent);
 
     this.list.toggle();
-  },
+  }
 
-  addEvents: function(){
+  addEvents() {
     this.eventWrapper.clicked = this.clicked.bind(this);
     this.trigger.addEventListener('click', this.eventWrapper.clicked);
-  },
+  }
 
-  removeEvents: function(){
+  removeEvents() {
     this.trigger.removeEventListener('click', this.eventWrapper.clicked);
-  },
+  }
 
-  restoreInitialState: function() {
+  restoreInitialState() {
     this.list.list.innerHTML = this.list.initialState;
-  },
+  }
 
-  removePlugins: function() {
+  removePlugins() {
     this.plugins.forEach(plugin => plugin.destroy());
-  },
+  }
 
-  destroy: function() {
+  destroy() {
     this.restoreInitialState();
 
     this.removeEvents();
     this.removePlugins();
-  },
-
-  constructor: HookButton,
-});
-
+  }
+}
 
 export default HookButton;

app/assets/javascripts/droplab/hook_input.js

-/* eslint-disable */
-
 import Hook from './hook';
 
-var HookInput = function(trigger, list, plugins, config) {
-  Hook.call(this, trigger, list, plugins, config);
+class HookInput extends Hook {
+  constructor(trigger, list, plugins, config) {
+    super(trigger, list, plugins, config);
 
     this.type = 'input';
     this.event = 'input';
@@ -12,14 +11,13 @@ var HookInput = function(trigger, list, plugins, config) {
 
     this.addEvents();
     this.addPlugins();
-};
+  }
 
-Object.assign(HookInput.prototype, {
-  addPlugins: function() {
+  addPlugins() {
     this.plugins.forEach(plugin => plugin.init(this));
-  },
+  }
 
-  addEvents: function(){
+  addEvents() {
     this.eventWrapper.mousedown = this.mousedown.bind(this);
     this.eventWrapper.input = this.input.bind(this);
     this.eventWrapper.keyup = this.keyup.bind(this);
@@ -29,19 +27,19 @@ Object.assign(HookInput.prototype, {
     this.trigger.addEventListener('input', this.eventWrapper.input);
     this.trigger.addEventListener('keyup', this.eventWrapper.keyup);
     this.trigger.addEventListener('keydown', this.eventWrapper.keydown);
-  },
+  }
 
-  removeEvents: function() {
+  removeEvents() {
     this.hasRemovedEvents = true;
 
     this.trigger.removeEventListener('mousedown', this.eventWrapper.mousedown);
     this.trigger.removeEventListener('input', this.eventWrapper.input);
     this.trigger.removeEventListener('keyup', this.eventWrapper.keyup);
     this.trigger.removeEventListener('keydown', this.eventWrapper.keydown);
-  },
+  }
 
-  input: function(e) {
-    if(this.hasRemovedEvents) return;
+  input(e) {
+    if (this.hasRemovedEvents) return;
 
     this.list.show();
 
@@ -51,12 +49,12 @@ Object.assign(HookInput.prototype, {
         text: e.target.value,
       },
       bubbles: true,
-      cancelable: true
+      cancelable: true,
     });
     e.target.dispatchEvent(inputEvent);
-  },
+  }
 
-  mousedown: function(e) {
+  mousedown(e) {
     if (this.hasRemovedEvents) return;
 
     const mouseEvent = new CustomEvent('mousedown.dl', {
@@ -68,21 +66,21 @@ Object.assign(HookInput.prototype, {
       cancelable: true,
     });
     e.target.dispatchEvent(mouseEvent);
-  },
+  }
 
-  keyup: function(e) {
+  keyup(e) {
     if (this.hasRemovedEvents) return;
 
     this.keyEvent(e, 'keyup.dl');
-  },
+  }
 
-  keydown: function(e) {
+  keydown(e) {
     if (this.hasRemovedEvents) return;
 
     this.keyEvent(e, 'keydown.dl');
-  },
+  }
 
-  keyEvent: function(e, eventName) {
+  keyEvent(e, eventName) {
     this.list.show();
 
     const keyEvent = new CustomEvent(eventName, {
@@ -96,17 +94,17 @@ Object.assign(HookInput.prototype, {
       cancelable: true,
     });
     e.target.dispatchEvent(keyEvent);
-  },
+  }
 
-  restoreInitialState: function() {
+  restoreInitialState() {
     this.list.list.innerHTML = this.list.initialState;
-  },
+  }
 
-  removePlugins: function() {
+  removePlugins() {
     this.plugins.forEach(plugin => plugin.destroy());
-  },
+  }
 
-  destroy: function() {
+  destroy() {
     this.restoreInitialState();
 
     this.removeEvents();
@@ -114,6 +112,6 @@ Object.assign(HookInput.prototype, {
 
     this.list.destroy();
   }
-});
+}
 
 export default HookInput;

spec/javascripts/droplab/drop_down_spec.js

-/* eslint-disable */
-
 import DropDown from '~/droplab/drop_down';
 import utils from '~/droplab/utils';
 import { SELECTED_CLASS, IGNORE_CLASS } from '~/droplab/constants';
@@ -17,7 +15,7 @@ describe('DropDown', function () {
 
     it('sets the .hidden property to true', function () {
       expect(this.dropdown.hidden).toBe(true);
-    })
+    });
 
     it('sets the .list property', function () {
       expect(this.dropdown.list).toBe(this.list);
@@ -152,7 +150,7 @@ describe('DropDown', function () {
 
     it('should call addSelectedClass', function () {
       expect(this.dropdown.addSelectedClass).toHaveBeenCalledWith(this.closestElement);
-    })
+    });
 
     it('should call .preventDefault', function () {
       expect(this.event.preventDefault).toHaveBeenCalled();
@@ -293,36 +291,6 @@ describe('DropDown', function () {
     });
   });
 
-  describe('toggle', function () {
-    beforeEach(function () {
-      this.dropdown = { hidden: true, show: () => {}, hide: () => {} };
-
-      spyOn(this.dropdown, 'show');
-      spyOn(this.dropdown, 'hide');
-
-      DropDown.prototype.toggle.call(this.dropdown);
-    });
-
-    it('should call .show if hidden is true', function () {
-      expect(this.dropdown.show).toHaveBeenCalled();
-    });
-
-    describe('if hidden is false', function () {
-      beforeEach(function () {
-        this.dropdown = { hidden: false, show: () => {}, hide: () => {} };
-
-        spyOn(this.dropdown, 'show');
-        spyOn(this.dropdown, 'hide');
-
-        DropDown.prototype.toggle.call(this.dropdown);
-      });
-
-      it('should call .show if hidden is true', function () {
-        expect(this.dropdown.hide).toHaveBeenCalled();
-      });
-    });
-  });
-
   describe('setData', function () {
     beforeEach(function () {
       this.dropdown = { render: () => {} };
@@ -399,7 +367,7 @@ describe('DropDown', function () {
       expect(this.data.map).toHaveBeenCalledWith(jasmine.any(Function));
     });
 
-    it('should call .renderChildren for each data item', function() {
+    it('should call .renderChildren for each data item', function () {
       expect(this.dropdown.renderChildren.calls.count()).toBe(this.data.length);
     });
 
@@ -407,7 +375,7 @@ describe('DropDown', function () {
       expect(this.renderableList.innerHTML).toBe('01');
     });
 
-    describe('if no data argument is passed' , function () {
+    describe('if no data argument is passed', function () {
       beforeEach(function () {
         this.data.map.calls.reset();
         this.dropdown.renderChildren.calls.reset();
@@ -446,14 +414,14 @@ describe('DropDown', function () {
   describe('renderChildren', function () {
     beforeEach(function () {
       this.templateString = 'templateString';
-      this.dropdown = { setImagesSrc: () => {}, templateString: this.templateString };
+      this.dropdown = { templateString: this.templateString };
       this.data = { droplab_hidden: true };
       this.html = 'html';
       this.template = { firstChild: { outerHTML: 'outerHTML', style: {} } };
 
       spyOn(utils, 'template').and.returnValue(this.html);
       spyOn(document, 'createElement').and.returnValue(this.template);
-      spyOn(this.dropdown, 'setImagesSrc');
+      spyOn(DropDown, 'setImagesSrc');
 
       this.renderChildren = DropDown.prototype.renderChildren.call(this.dropdown, this.data);
     });
@@ -471,7 +439,7 @@ describe('DropDown', function () {
     });
 
     it('should call .setImagesSrc with the template', function () {
-      expect(this.dropdown.setImagesSrc).toHaveBeenCalledWith(this.template);
+      expect(DropDown.setImagesSrc).toHaveBeenCalledWith(this.template);
     });
 
     it('should set the template display to none', function () {
@@ -496,12 +464,11 @@ describe('DropDown', function () {
 
   describe('setImagesSrc', function () {
     beforeEach(function () {
-      this.dropdown = {};
       this.template = { querySelectorAll: () => {} };
 
       spyOn(this.template, 'querySelectorAll').and.returnValue([]);
 
-      DropDown.prototype.setImagesSrc.call(this.dropdown, this.template);
+      DropDown.setImagesSrc(this.template);
     });
 
     it('should call .querySelectorAll', function () {
@@ -562,7 +529,7 @@ describe('DropDown', function () {
 
   describe('toggle', function () {
     beforeEach(function () {
-      this.hidden = true
+      this.hidden = true;
       this.dropdown = { hidden: this.hidden, show: () => {}, hide: () => {} };
 
       spyOn(this.dropdown, 'show');
@@ -577,7 +544,7 @@ describe('DropDown', function () {
 
     describe('if .hidden is false', function () {
       beforeEach(function () {
-        this.hidden = false
+        this.hidden = false;
         this.dropdown = { hidden: this.hidden, show: () => {}, hide: () => {} };
 
         spyOn(this.dropdown, 'show');

spec/javascripts/droplab/hook_spec.js

-/* eslint-disable */
-
 import Hook from '~/droplab/hook';
 import * as dropdownSrc from '~/droplab/drop_down';
 
@@ -73,10 +71,4 @@ describe('Hook', function () {
       });
     });
   });
-
-  describe('addEvents', function () {
-    it('should exist', function () {
-      expect(Hook.prototype.hasOwnProperty('addEvents')).toBe(true);
-    });
-  });
 });