Add shreder95ua/resolution extension (#836)

extensions/extensions.json

@@ -27,6 +27,7 @@
   "NexusKitten/moremotion",
   "CubesterYT/WindowControls",
   "veggiecan/browserfullscreen",
+  "shreder95ua/resolution",
   "navigator",
   "battery",
   "TheShovel/CustomStyles",

extensions/shreder95ua/resolution.js

@@ -0,0 +1,39 @@
+// Name: Screen Resolution
+// ID: shreder95resolution
+// Description: Get the resolution of the primary screen.
+// By: shreder95ua <https://scratch.mit.edu/users/shreder95ua/>
+
+(function (Scratch) {
+  "use strict";
+
+  class Resolution {
+    getInfo() {
+      return {
+        id: "shreder95resolution",
+        name: "Screen resolution",
+        color1: "#FFAB19",
+        color2: "#EC9C13",
+        color3: "#CF8B17",
+        blocks: [
+          {
+            opcode: "getWidth",
+            text: "primary screen width",
+            blockType: Scratch.BlockType.REPORTER,
+          },
+          {
+            opcode: "getHeight",
+            text: "primary screen height",
+            blockType: Scratch.BlockType.REPORTER,
+          },
+        ],
+      };
+    }
+    getWidth() {
+      return window.screen.width;
+    }
+    getHeight() {
+      return window.screen.height;
+    }
+  }
+  Scratch.extensions.register(new Resolution());
+})(Scratch);