Use === and !== for comparisons with 0

src/ol/geom/base.js

@@ -28,7 +28,7 @@ ol.geom.squaredDistanceToSegment = function(coordinate, segment) {
   var v = segment[0];
   var w = segment[1];
   var l2 = ol.coordinate.squaredDistance(v, w);
-  if (l2 == 0) {
+  if (l2 === 0) {
     return ol.coordinate.squaredDistance(coordinate, v);
   }
   var t = ((coordinate[0] - v[0]) * (w[0] - v[0]) +

src/ol/interaction/touchpaninteraction.js

@@ -82,7 +82,7 @@ ol.interaction.TouchPan.prototype.handleTouchEnd =
     function(mapBrowserEvent) {
   var map = mapBrowserEvent.map;
   var view = map.getView();
-  if (this.targetTouches.length == 0) {
+  if (this.targetTouches.length === 0) {
     var interacting = view.setHint(ol.ViewHint.INTERACTING, -1);
     if (!this.noKinetic_ && this.kinetic_ && this.kinetic_.end()) {
       var distance = this.kinetic_.getDistance();

src/ol/map.js

@@ -792,7 +792,7 @@ ol.Map.prototype.renderFrame_ = function(time) {
 
   var i, ii, view2DState;
 
-  if (this.freezeRenderingCount_ != 0) {
+  if (this.freezeRenderingCount_ !== 0) {
     return;
   }
 

src/ol/mapbrowserevent.js

@@ -209,7 +209,7 @@ ol.MapBrowserEventHandler.prototype.click_ = function(browserEvent) {
   if (!this.dragged_) {
     var newEvent;
     var type = browserEvent.type;
-    if (this.timestamp_ == 0 || type == goog.events.EventType.DBLCLICK) {
+    if (this.timestamp_ === 0 || type == goog.events.EventType.DBLCLICK) {
       newEvent = new ol.MapBrowserEvent(
           ol.MapBrowserEvent.EventType.DBLCLICK, this.map_, browserEvent);
       this.dispatchEvent(newEvent);

src/ol/projection/projection.js

@@ -417,7 +417,7 @@ ol.projection.removeTransform = function(source, destination) {
   var transform = transforms[sourceCode][destinationCode];
   delete transforms[sourceCode][destinationCode];
   var keys = goog.object.getKeys(transforms[sourceCode]);
-  if (keys.length == 0) {
+  if (keys.length === 0) {
     delete transforms[sourceCode];
   }
   return transform;

src/ol/renderer/canvas/canvasmaprenderer.js

@@ -132,7 +132,7 @@ ol.renderer.canvas.Map.prototype.renderFrame = function(frameState) {
 
       // for performance reasons, context.setTransform is only used
       // when the view is rotated. see http://jsperf.com/canvas-transform
-      if (frameState.view2DState.rotation == 0) {
+      if (frameState.view2DState.rotation === 0) {
         var dx = goog.vec.Mat4.getElement(transform, 0, 3);
         var dy = goog.vec.Mat4.getElement(transform, 1, 3);
         var dw = image.width * goog.vec.Mat4.getElement(transform, 0, 0);