diff --git a/docs/src/api/class-frame.md b/docs/src/api/class-frame.md
index c660e9140f731..1bf04d1d10274 100644
--- a/docs/src/api/class-frame.md
+++ b/docs/src/api/class-frame.md
@@ -1046,9 +1046,8 @@ async def run(playwright):
     webkit = playwright.webkit
     browser = await webkit.launch()
     page = await browser.new_page()
-    watch_dog = asyncio.create_task(page.main_frame.wait_for_function("() => window.innerWidth < 100")
-    await page.set_viewport_size({"width": 50, "height": 50})
-    await watch_dog
+    await page.evaluate("window.x = 0; setTimeout(() => { window.x = 100 }, 1000);", force_expr=True)
+    await page.main_frame.wait_for_function("() => window.x > 0")
     await browser.close()
 
 async def main():
@@ -1057,6 +1056,21 @@ async def main():
 asyncio.run(main())
 ```
 
+```python sync
+from playwright.sync_api import sync_playwright
+
+def run(playwright):
+    webkit = playwright.webkit
+    browser = webkit.launch()
+    page = browser.new_page()
+    page.evaluate("window.x = 0; setTimeout(() => { window.x = 100 }, 1000);", force_expr=True)
+    page.main_frame.wait_for_function("() => window.x > 0")
+    browser.close()
+
+with sync_playwright() as playwright:
+    run(playwright)
+```
+
 To pass an argument to the predicate of `frame.waitForFunction` function:
 
 ```js
diff --git a/docs/src/api/class-page.md b/docs/src/api/class-page.md
index 91ae120eca259..63432c9304e37 100644
--- a/docs/src/api/class-page.md
+++ b/docs/src/api/class-page.md
@@ -2209,9 +2209,8 @@ async def run(playwright):
     webkit = playwright.webkit
     browser = await webkit.launch()
     page = await browser.new_page()
-    watch_dog = page.wait_for_function("() => window.innerWidth < 100")
-    await page.set_viewport_size({"width": 50, "height": 50})
-    await watch_dog
+    await page.evaluate("window.x = 0; setTimeout(() => { window.x = 100 }, 1000);", force_expr=True)
+    await page.wait_for_function("() => window.x > 0")
     await browser.close()
 
 async def main():
@@ -2225,12 +2224,11 @@ from playwright.sync_api import sync_playwright
 
 def run(playwright):
     webkit = playwright.webkit
-    browser = await webkit.launch()
-    page = await browser.new_page()
-    watch_dog = page.wait_for_function("() => window.innerWidth < 100")
-    await page.set_viewport_size({"width": 50, "height": 50})
-    await watch_dog
-    await browser.close()
+    browser = webkit.launch()
+    page = browser.new_page()
+    page.evaluate("window.x = 0; setTimeout(() => { window.x = 100 }, 1000);", force_expr=True)
+    page.wait_for_function("() => window.x > 0")
+    browser.close()
 
 with sync_playwright() as playwright:
     run(playwright)
diff --git a/utils/markdown.js b/utils/markdown.js
index a1203d775f7bc..4b30e96687ca4 100644
--- a/utils/markdown.js
+++ b/utils/markdown.js
@@ -247,7 +247,8 @@ function innerRenderMdNode(indent, node, lastNode, result, maxColumns) {
     const bothLinks = node.text.match(/\[[^\]]+\]:/) && lastNode && lastNode.type === 'text' && lastNode.text.match(/\[[^\]]+\]:/);
     if (!bothTables && !bothGen && !bothComments && !bothLinks && lastNode && lastNode.text)
       newLine();
-      result.push(wrapText(node.text, maxColumns, indent));
+      for (const line of node.text.split('\n'))
+        result.push(wrapText(line, maxColumns, indent));
     return;
   }