Prefer ES5 methods over underscore utilities

Since 07cc454 (ie the switch to Meteor 1.2) we includes the `es5-shim`
polyfill to support methods like `Array.prototype.forEach` in a
consistent way across all supported browsers (IE8+).

MDG recently released a blog post recommending the use of these native
methods instead of underscore [0]. We know follow this recommendation.

This commit also favor some ES6 features (argument defaults,
destructing assignment) in places where we didn’t use them.

[0]: http://info.meteor.com/blog/es2015-get-started

client/components/cards/cardDetails.js

@@ -62,7 +62,8 @@ BlazeComponent.extendComponent({
       },
     };
 
-    return [_.extend(events, {
+    return [{
+      ...events,
       'click .js-close-card-details'() {
         Utils.goBoardId(this.data().boardId);
       },
@@ -86,7 +87,7 @@ BlazeComponent.extendComponent({
         this.parentComponent().showOverlay.set(true);
         this.parentComponent().mouseHasEnterCardDetails = true;
       },
-    })];
+    }];
   },
 }).register('cardDetails');
 

client/components/cards/labels.js

@@ -13,7 +13,7 @@ BlazeComponent.extendComponent({
   },
 
   labels() {
-    return _.map(labelColors, (color) => {
+    return labelColors.map((color) => {
       return { color, name: '' };
     });
   },

client/components/main/editor.js

@@ -54,7 +54,7 @@ const at = HTML.CharRef({html: '@', str: '@'});
 Blaze.Template.registerHelper('mentions', new Template('mentions', function() {
   const view = this;
   const currentBoard = Boards.findOne(Session.get('currentBoard'));
-  const knowedUsers = _.map(currentBoard.members, (member) => {
+  const knowedUsers = currentBoard.members.map((member) => {
     member.username = Users.findOne(member.userId).username;
     return member;
   });

client/components/sidebar/sidebar.js

@@ -95,10 +95,10 @@ BlazeComponent.extendComponent({
   events() {
     // XXX Hacky, we need some kind of `super`
     const mixinEvents = this.getMixin(Mixins.InfiniteScrolling).events();
-    return mixinEvents.concat([{
+    return [...mixinEvents, {
       'click .js-toggle-sidebar': this.toggle,
       'click .js-back-home': this.setView,
-    }]);
+    }];
   },
 }).register('sidebar');
 

client/components/users/userHeader.js

@@ -41,7 +41,7 @@ Template.changePasswordPopup.onRendered(function() {
 
 Template.changeLanguagePopup.helpers({
   languages() {
-    return _.map(TAPi18n.getLanguages(), (lang, tag) => {
+    return TAPi18n.getLanguages().map((lang, tag) => {
       const name = lang.name;
       return { tag, name };
     });

client/config/accounts.js

@@ -25,7 +25,7 @@ AccountsTemplates.configure({
   },
 });
 
-_.each(['signIn', 'signUp', 'resetPwd', 'forgotPwd', 'enrollAccount'],
+['signIn', 'signUp', 'resetPwd', 'forgotPwd', 'enrollAccount'].forEach(
   (routeName) => AccountsTemplates.configureRoute(routeName));
 
 // We display the form to change the password in a popup window that already

client/lib/filter.js

@@ -95,7 +95,7 @@ Filter = {
       return {};
 
     const filterSelector = {};
-    _.forEach(this._fields, (fieldName) => {
+    this._fields.forEach((fieldName) => {
       const filter = this[fieldName];
       if (filter._isActive())
         filterSelector[fieldName] = filter._getMongoSelector();
@@ -116,7 +116,7 @@ Filter = {
   },
 
   reset() {
-    _.forEach(this._fields, (fieldName) => {
+    this._fields.forEach((fieldName) => {
       const filter = this[fieldName];
       filter.reset();
     });

client/lib/modal.js

@@ -21,9 +21,9 @@ window.Modal = new class {
     }
   }
 
-  open(modalName, options) {
+  open(modalName, { onCloseGoTo = ''}) {
     this._currentModal.set(modalName);
-    this._onCloseGoTo = options && options.onCloseGoTo || '';
+    this._onCloseGoTo = onCloseGoTo;
   }
 };
 

client/lib/multiSelection.js

@@ -119,12 +119,13 @@ MultiSelection = {
     }
   },
 
-  toggle(cardIds, options) {
+  toggle(cardIds, options = {}) {
     cardIds = _.isString(cardIds) ? [cardIds] : cardIds;
-    options = _.extend({
+    options = {
       add: true,
       remove: true,
-    }, options || {});
+      ...options,
+    };
 
     if (!this.isActive()) {
       this.reset();
@@ -133,7 +134,7 @@ MultiSelection = {
 
     const selectedCards = this._selectedCards.get();
 
-    _.each(cardIds, (cardId) => {
+    cardIds.forEach((cardId) => {
       const indexOfCard = selectedCards.indexOf(cardId);
 
       if (options.remove && indexOfCard > -1)

client/lib/popup.js

@@ -91,7 +91,7 @@ window.Popup = new class {
       if (!self.isOpen()) {
         self.current = Blaze.renderWithData(self.template, () => {
           self._dep.depend();
-          return _.extend(self._getTopStack(), { stack: self._stack });
+          return { ...self._getTopStack(), stack: self._stack };
         }, document.body);
 
       } else {
@@ -191,7 +191,7 @@ window.Popup = new class {
 // We close a potential opened popup on any left click on the document, or go
 // one step back by pressing escape.
 const escapeActions = ['back', 'close'];
-_.each(escapeActions, (actionName) => {
+escapeActions.forEach((actionName) => {
   EscapeActions.register(`popup-${actionName}`,
     () => Popup[actionName](),
     () => Popup.isOpen(),