Added isElectron module

src/modules/isElectron.js

@@ -0,0 +1,20 @@
+function isElectron() {
+    // Renderer process
+    if (typeof window !== 'undefined' && typeof window.process === 'object' && window.process.type === 'renderer') {
+        return true;
+    }
+
+    // Main process
+    if (typeof process !== 'undefined' && typeof process.versions === 'object' && !!process.versions.electron) {
+        return true;
+    }
+
+    // Detect the user agent when the `nodeIntegration` option is set to true
+    if (typeof navigator === 'object' && typeof navigator.userAgent === 'string' && navigator.userAgent.indexOf('Electron') >= 0) {
+        return true;
+    }
+
+    return false;
+}
+
+export default isElectron;