Fix requirement for Math.sign

material/base.html

@@ -19,7 +19,7 @@
       {% else %}
         <link rel="shortcut icon" href="{{ base_url }}/assets/images/favicon.ico">
       {% endif %}
-      <meta name="generator" content="mkdocs+mkdocs-material#1.0.2">
+      <meta name="generator" content="mkdocs+mkdocs-material#1.0.3">
     {% endblock %}
     {% block htmltitle %}
       {% if page.title %}
@@ -124,7 +124,7 @@
       {% endblock %}
     </div>
     {% block scripts %}
-      <script src="{{ base_url }}/assets/javascripts/application-eb5283d5b7.js"></script>
+      <script src="{{ base_url }}/assets/javascripts/application-2afe21e0b2.js"></script>
       <script>var config={url:{base:"{{ base_url }}"}},app=new Application(config);app.initialize()</script>
       {% for path in extra_javascript %}
         <script src="{{ path }}"></script>

src/assets/javascripts/components/Material/Nav/Blur.js

@@ -42,7 +42,7 @@ export default class Blur {
     this.offset_ = window.pageYOffset
 
     /* Necessary state to correctly reset the index */
-    this.dir_ = 0
+    this.dir_ = false
 
     /* Index anchor node offsets for fast lookup */
     this.anchors_ = [].map.call(this.els_, el => {
@@ -65,12 +65,12 @@ export default class Blur {
    */
   update() {
     const offset = window.pageYOffset
-    const dir = Math.sign(this.offset_ - offset)
+    const dir = this.offset_ - offset < 0
 
     /* Hack: reset index if direction changed, to catch very fast scrolling,
        because otherwise we would have to register a timer and that sucks */
     if (this.dir_ !== dir)
-      this.index_ = dir < 0
+      this.index_ = dir
         ? this.index_ = 0
         : this.index_ = this.els_.length - 1