added code example

content/docs/2023/mediaart-programming2/10/autoscroll.js

@@ -0,0 +1,18 @@
+async function autoScroll(page, maxScrolls) {
+    await page.evaluate(async maxScrolls => {
+        await new Promise((then) => {
+            let distance = 1000;
+            let scrolls = 0; 
+            let timer = setInterval(() => {
+                window.scrollBy(0, distance);
+                scrolls += 1;
+               if (scrolls >= maxScrolls) {
+                    clearInterval(timer);
+                    then();
+                }
+            }, 100);
+        });
+    }, maxScrolls);
+}
+
+exports.autoScroll = autoScroll;