added code example

content/docs/2023/mediaart-programming2/10/5_youtube_hopper.js

@@ -0,0 +1,19 @@
+const puppeteer = require('puppeteer');
+const autoScroll = require("./autoscroll.js").autoScroll;
+
+const main = async () => {
+    let browser = await puppeteer.launch({ headless: false });
+    let page = await browser.newPage();
+    await page.goto('https://www.youtube.com/');
+    for (let i = 0; i < 1000; i++) {
+        const urllist = await page.$$eval("a#thumbnail", elems => elems.map(elem => elem.href));
+        const url = urllist[3];
+        console.log(url)
+        await page.goto(url);
+        await autoScroll(page, 10);
+        await page.screenshot({ path: `${i}.png`, fullPage: true });
+    }
+    await page.close();
+    await browser.close();
+}
+main();