Split JS code by classes into different files

app/js/storage.js

@@ -0,0 +1,10 @@
+var Storage = {
+    set: function(category, key, value) {
+        window.localStorage.setItem(category +'-'+ key, JSON.stringify(value));
+    },
+
+    get: function(category, key) {
+        var val = window.localStorage.getItem(category +'-'+ key);
+        return val === null ? {} : JSON.parse(val);
+    }
+};

app/js/svg_text_width.js

@@ -0,0 +1,23 @@
+var fontFamily = "'Open Sans', Helvetica, Arial, sans-serif",
+    fontSize = 16;
+
+function textWidth(str) {
+    var svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
+        text = document.createElementNS('http://www.w3.org/2000/svg', 'text');
+
+    svg.width = 500;
+    svg.height = 500;
+    svg.style.position = 'absolute';
+    svg.style.left = '-1000px';
+
+    text.appendChild(document.createTextNode(str))
+    text.style.fontFamily = fontFamily;
+    text.style.fontSize = fontSize +'px';
+
+    svg.appendChild(text);
+    document.body.appendChild(svg);
+    var box = text.getBBox();
+    document.body.removeChild(svg);
+
+    return box.width;
+}