Create simple debounce and throttle instead of _.

src/js/util/debounce.js

@@ -0,0 +1,17 @@
+module.exports = function(func, time, immediate) {
+    var timeout;
+    return function() {
+      var later = function() {
+        timeout = null;
+        if (!immediate) {
+          func.apply(this, arguments);
+        }
+      };
+      var callNow = immediate && !timeout;
+      clearTimeout(timeout);
+      timeout = setTimeout(later, time);
+      if (callNow) {
+        func.apply(this, arguments);
+      }
+    };
+  };

src/js/util/throttle.js

@@ -0,0 +1,13 @@
+module.exports = function(func, time) {
+    var wait = false;
+    return function() {
+      if (!wait) {
+        func.apply(this, arguments);
+        wait = true;
+        
+        setTimeout(function() {
+          wait = false;
+        }, time);
+      }
+    };
+  };

src/js/views/builderViews.js

@@ -2,6 +2,7 @@ var _ = require('underscore');
 var Q = require('q');
 
 var Views = require('../views');
+var throttle = require('../util/throttle');
 var ModalTerminal = Views.ModalTerminal;
 var ContainedBase = Views.ContainedBase;
 
@@ -97,7 +98,7 @@ var MarkdownGrabber = ContainedBase.extend({
 
   keyup: function() {
     if (!this.throttledPreview) {
-      this.throttledPreview = _.throttle(
+      this.throttledPreview = throttle(
         this.updatePreview.bind(this),
         500
       );

src/js/views/index.js

@@ -7,6 +7,8 @@ var intl = require('../intl');
 var log = require('../log');
 var Constants = require('../util/constants');
 var KeyboardListener = require('../util/keyboard').KeyboardListener;
+var debounce = require('../util/debounce');
+var throttle = require('../util/throttle');
 
 var BaseView = Backbone.View.extend({
   getDestination: function() {
@@ -106,7 +108,7 @@ var GeneralButton = ContainedBase.extend({
 
   click: function() {
     if (!this.clickFunc) {
-      this.clickFunc = _.throttle(
+      this.clickFunc = throttle(
         this.sendClick.bind(this),
         500
       );
@@ -580,7 +582,7 @@ var CanvasTerminalHolder = BaseView.extend({
 
     // If the entire window gets resized such that the terminal is outside the view, then
     // move it back into the view, and expand/shrink it vertically as necessary.
-    $(window).on('resize', _.debounce(this.recalcLayout.bind(this), 300));
+    $(window).on('resize', debounce(this.recalcLayout.bind(this), 300));
 
     if (options.additionalClass) {
       this.$el.addClass(options.additionalClass);

src/js/views/levelDropdownView.js

@@ -4,6 +4,7 @@ var Backbone = require('backbone');
 var LocaleStore = require('../stores/LocaleStore');
 
 var util = require('../util');
+var debounce = require('../util/debounce');
 var intl = require('../intl');
 var log = require('../log');
 var KeyboardListener = require('../util/keyboard').KeyboardListener;
@@ -41,7 +42,7 @@ var LevelDropdownView = ContainedBase.extend({
     };
 
     this.navEvents = Object.assign({}, Backbone.Events);
-    this.navEvents.on('clickedID', _.debounce(
+    this.navEvents.on('clickedID', debounce(
       this.loadLevelID.bind(this),
       300,
       true

src/js/views/multiView.js

@@ -1,4 +1,3 @@
-var _ = require('underscore');
 var Q = require('q');
 var Backbone = require('backbone');
 
@@ -10,6 +9,7 @@ var BuilderViews = require('../views/builderViews');
 var MarkdownPresenter = BuilderViews.MarkdownPresenter;
 
 var KeyboardListener = require('../util/keyboard').KeyboardListener;
+var debounce = require('../util/debounce');
 
 var MultiView = Backbone.View.extend({
   tagName: 'div',
@@ -84,13 +84,13 @@ var MultiView = Backbone.View.extend({
   },
 
   getPosFunc: function() {
-    return _.debounce(function() {
+    return debounce(function() {
       this.navForward();
     }.bind(this), this.navEventDebounce, true);
   },
 
   getNegFunc: function() {
-    return _.debounce(function() {
+    return debounce(function() {
       this.navBackward();
     }.bind(this), this.navEventDebounce, true);
   },

src/js/visuals/index.js

@@ -3,6 +3,7 @@ var Q = require('q');
 
 var intl = require('../intl');
 var GRAPHICS = require('../util/constants').GRAPHICS;
+var debounce = require('../util/debounce');
 var GlobalStateStore = require('../stores/GlobalStateStore');
 
 var VisNode = require('../visuals/visNode').VisNode;
@@ -795,7 +796,7 @@ GitVisuals.prototype.canvasResize = function(width, height) {
 };
 
 GitVisuals.prototype.genResizeFunc = function() {
-  this.resizeFunc = _.debounce(
+  this.resizeFunc = debounce(
     function(width, height) {
       this.refreshTree();
     }.bind(this),