ok

build/bundle.js

@@ -13860,7 +13860,7 @@ GitVisuals.prototype.genSnapshot = function() {
 };
 
 GitVisuals.prototype.refreshTree = function(speed) {
-  if (!this.gitReady) {
+  if (!this.gitReady || !this.gitEngine.rootCommit) {
     return;
   }
 
@@ -25099,7 +25099,7 @@ GitVisuals.prototype.genSnapshot = function() {
 };
 
 GitVisuals.prototype.refreshTree = function(speed) {
-  if (!this.gitReady) {
+  if (!this.gitReady || !this.gitEngine.rootCommit) {
     return;
   }
 

grunt.js

@@ -89,7 +89,7 @@ module.exports = function(grunt) {
       }
     },
     browserify: {
-      'build/bundle.js': {
+      'build/bundle2.js': {
         entries: ['src/**/*.js', 'src/js/**/*.js']
         //prepend: ['<banner:meta.banner>'],
       }

index.html

@@ -402,7 +402,7 @@
        For a much easier time perusing the source, see the individual files at:
           https://github.com/pcottle/learnGitBranching
   -->
-  <script src="build/bundle.js"></script>
+  <script src="build/bundle2.js"></script>
 
   <!-- The advantage of github pages: super-easy, simple, slick static hostic.
        The downside? No raw logs to parse for analytics, so I have to include

src/js/visuals/index.js

@@ -334,7 +334,7 @@ GitVisuals.prototype.genSnapshot = function() {
 };
 
 GitVisuals.prototype.refreshTree = function(speed) {
-  if (!this.gitReady) {
+  if (!this.gitReady || !this.gitEngine.rootCommit) {
     return;
   }