minor refactoring

lib/lazy/content/content-lazy-loader.js

@@ -28,11 +28,9 @@ this.lazyLoader = this.lazyLoader || (() => {
 
 	return {
 		process: options => {
-			const clientHeight = document.documentElement.clientHeight;
-			const clientWidth = document.documentElement.clientWidth;
-			const scrollHeight = Math.max(document.documentElement.scrollHeight - (clientHeight * 1.5), 0);
-			const scrollWidth = Math.max(document.documentElement.scrollWidth - (clientWidth * 1.5), 0);
-			if (scrollY <= scrollHeight && scrollX <= scrollWidth) {
+			const maxScrollY = Math.max(document.documentElement.scrollHeight - (document.documentElement.clientHeight * 1.5), 0);
+			const maxScrollX = Math.max(document.documentElement.scrollWidth - (document.documentElement.clientWidth * 1.5), 0);
+			if (scrollY <= maxScrollY && scrollX <= maxScrollX) {
 				return process(options);
 			} else {
 				return Promise.resolve();