more refactoring (sidebar, meshstats)

lib/sidebar.js

@@ -0,0 +1,34 @@
+define([], function () {
+  return function (el) {
+    var self = this
+
+    var sidebar = document.createElement("div")
+    sidebar.classList.add("sidebar")
+    el.appendChild(sidebar)
+
+    var button = document.createElement("button")
+    sidebar.appendChild(button)
+
+    button.classList.add("sidebarhandle")
+    button.onclick = function () {
+      sidebar.classList.toggle("hidden")
+    }
+
+    var container = document.createElement("div")
+    container.classList.add("container")
+    sidebar.appendChild(container)
+
+    self.getWidth = function () {
+      var small = window.matchMedia("(max-width: 60em)");
+      return small.matches ? 0 : sidebar.offsetWidth
+    }
+
+    self.add = function (d) {
+      d.render(container)
+    }
+
+    self.container = container
+
+    return self
+  }
+})