Bugfix for SSR ReferenceError: document is not defined (#84)

* Update web.ts

* Update web.ts

* Update package.json

* Update package.json

* Update web.ts

* Update web.ts

* Update web.ts

Author: aerodynamics-digital

package.json

@@ -8,7 +8,8 @@
     "build": "npm run clean && tsc",
     "clean": "rm -rf ./dist",
     "watch": "tsc --watch",
-    "prepublishOnly": "npm run build"
+    "prepublishOnly": "npm run build",
+    "prepare": "tsc"
   },
   "author": "CodetrixStudio",
   "license": "MIT",

src/web.ts

@@ -10,7 +10,11 @@ export class GoogleAuthWeb extends WebPlugin implements GoogleAuthPlugin {
   gapiLoaded: Promise<void>;
 
   get webConfigured(): boolean {
-    return document.getElementsByName('google-signin-client_id').length > 0;
+    if (typeof document !== 'undefined') {
+      return document.getElementsByName('google-signin-client_id').length > 0;
+    } else {
+      return false;
+    }
   }
 
   constructor() {