Use strict equalities in web/viewer.js

web/viewer.js

@@ -805,7 +805,7 @@ var PDFView = {
         var pdfOpenParams = PDFView.getAnchorUrl('#page=' + pageNumber);
         var destKind = dest[1];
         if (typeof destKind === 'object' && 'name' in destKind &&
-            destKind.name == 'XYZ') {
+            destKind.name === 'XYZ') {
           var scale = (dest[4] || this.currentScaleValue);
           var scaleNumber = parseFloat(scale);
           if (scaleNumber) {
@@ -1668,9 +1668,9 @@ var PDFView = {
 
       // In case we are already on the first or the last page there is no need
       // to do anything.
-      if ((currentPage == 1 && pageFlipDirection == PageFlipDirection.UP) ||
-          (currentPage == this.pages.length &&
-           pageFlipDirection == PageFlipDirection.DOWN)) {
+      if ((currentPage === 1 && pageFlipDirection === PageFlipDirection.UP) ||
+          (currentPage === this.pages.length &&
+           pageFlipDirection === PageFlipDirection.DOWN)) {
         return;
       }
 
@@ -1862,7 +1862,7 @@ function webViewerInitialized() {
   var mainContainer = document.getElementById('mainContainer');
   var outerContainer = document.getElementById('outerContainer');
   mainContainer.addEventListener('transitionend', function(e) {
-    if (e.target == mainContainer) {
+    if (e.target === mainContainer) {
       var event = document.createEvent('UIEvents');
       event.initUIEvent('resize', false, false, window, 0);
       window.dispatchEvent(event);
@@ -2107,7 +2107,7 @@ function selectScaleOption(value) {
   var predefinedValueFound = false;
   for (var i = 0; i < options.length; i++) {
     var option = options[i];
-    if (option.value != value) {
+    if (option.value !== value) {
       option.selected = false;
       continue;
     }