Create settings.js

apps/backlite/settings.js

@@ -0,0 +1,25 @@
+(function(back) {
+  var FILE = "BackLite.settings.json";
+  // Load settings
+  var settings = Object.assign({
+      brightness: 0.3,
+  }, require('Storage').readJSON(FILE, true) || {});
+
+  function writeSettings() {
+    require('Storage').writeJSON(FILE, settings);
+  }
+
+  // Show the menu
+  E.showMenu({
+    "" : { "title" : "BackLite" },
+    'Brightness': {
+      value: 0.3|settings.brightness,  
+      min: 0.1, max: 1,
+      step: 0.1,
+      onchange: v => {
+        settings.brightness = v;
+        writeSettings();
+      }
+    },
+  });
+});