bump 1.7.3

docs/_coverpage.md

@@ -1,6 +1,6 @@
 ![logo](_media/icon.svg)
 
-# docsify <small>1.7.2</small>
+# docsify <small>1.7.3</small>
 
 > A magical documentation site generator.
 

lib/docsify.js

@@ -2703,7 +2703,7 @@ var script = document.currentScript || [].slice.call(document.getElementsByTagNa
 if (script) {
   for (var prop in OPTIONS) {
     var val = script.getAttribute('data-' + camel2kebab(prop));
-    OPTIONS[prop] = isNil(val) ? OPTIONS[prop] : (val || true);
+    OPTIONS[prop] = isNil(val) ? OPTIONS[prop] : (typeof OPTIONS[prop] === 'string' ? val : true);
   }
   if (OPTIONS.loadSidebar === true) { OPTIONS.loadSidebar = '_sidebar.md'; }
   if (OPTIONS.loadNavbar === true) { OPTIONS.loadNavbar = '_navbar.md'; }