docs: add route example with some logic

docs/src/api/class-browsercontext.md

@@ -774,6 +774,44 @@ page.goto("https://example.com")
 browser.close()
 ```
 
+It is possible to examine the request to decide the route action. For example, mocking all requests that contain some post data, and leaving all other requests as is:
+
+```js
+await context.route('/api/**', route => {
+  if (route.request().postData().includes('my-string'))
+    route.fulfill({ body: 'mocked-data' });
+  else
+    route.continue();
+});
+```
+
+```java
+context.route("/api/**", route -> {
+  if (route.request().postData().contains("my-string"))
+    route.fulfill(new Route.FulfillOptions().setBody("mocked-data"));
+  else
+    route.resume();
+});
+```
+
+```python async
+def handle_route(route):
+  if ("my-string" in route.request.post_data)
+    route.fulfill(body="mocked-data")
+  else
+    route.continue_()
+await context.route("/api/**", handle_route)
+```
+
+```python sync
+def handle_route(route):
+  if ("my-string" in route.request.post_data)
+    route.fulfill(body="mocked-data")
+  else
+    route.continue_()
+context.route("/api/**", handle_route)
+```
+
 Page routes (set up with [`method: Page.route`]) take precedence over browser context routes when request matches both
 handlers.
 

docs/src/api/class-page.md

@@ -2144,6 +2144,44 @@ page.goto("https://example.com")
 browser.close()
 ```
 
+It is possible to examine the request to decide the route action. For example, mocking all requests that contain some post data, and leaving all other requests as is:
+
+```js
+await page.route('/api/**', route => {
+  if (route.request().postData().includes('my-string'))
+    route.fulfill({ body: 'mocked-data' });
+  else
+    route.continue();
+});
+```
+
+```java
+page.route("/api/**", route -> {
+  if (route.request().postData().contains("my-string"))
+    route.fulfill(new Route.FulfillOptions().setBody("mocked-data"));
+  else
+    route.resume();
+});
+```
+
+```python async
+def handle_route(route):
+  if ("my-string" in route.request.post_data)
+    route.fulfill(body="mocked-data")
+  else
+    route.continue_()
+await page.route("/api/**", handle_route)
+```
+
+```python sync
+def handle_route(route):
+  if ("my-string" in route.request.post_data)
+    route.fulfill(body="mocked-data")
+  else
+    route.continue_()
+page.route("/api/**", handle_route)
+```
+
 Page routes take precedence over browser context routes (set up with [`method: BrowserContext.route`]) when request
 matches both handlers.
 

docs/src/api/class-route.md

@@ -66,7 +66,7 @@ async def handle(route, request):
         "foo": "bar" # set "foo" header
         "origin": None # remove "origin" header
     }
-    await route.continue(headers=headers)
+    await route.continue_(headers=headers)
 }
 await page.route("**/*", handle)
 ```
@@ -79,7 +79,7 @@ def handle(route, request):
         "foo": "bar" # set "foo" header
         "origin": None # remove "origin" header
     }
-    route.continue(headers=headers)
+    route.continue_(headers=headers)
 }
 page.route("**/*", handle)
 ```

types/types.d.ts

@@ -2382,6 +2382,18 @@ export interface Page {
    * await browser.close();
    * ```
    * 
+   * It is possible to examine the request to decide the route action. For example, mocking all requests that contain some
+   * post data, and leaving all other requests as is:
+   * 
+   * ```js
+   * await page.route('/api/**', route => {
+   *   if (route.request().postData().includes('my-string'))
+   *     route.fulfill({ body: 'mocked-data' });
+   *   else
+   *     route.continue();
+   * });
+   * ```
+   * 
    * Page routes take precedence over browser context routes (set up with
    * [browserContext.route(url, handler)](https://playwright.dev/docs/api/class-browsercontext#browsercontextrouteurl-handler))
    * when request matches both handlers.
@@ -5262,6 +5274,18 @@ export interface BrowserContext {
    * await browser.close();
    * ```
    * 
+   * It is possible to examine the request to decide the route action. For example, mocking all requests that contain some
+   * post data, and leaving all other requests as is:
+   * 
+   * ```js
+   * await context.route('/api/**', route => {
+   *   if (route.request().postData().includes('my-string'))
+   *     route.fulfill({ body: 'mocked-data' });
+   *   else
+   *     route.continue();
+   * });
+   * ```
+   * 
    * Page routes (set up with [page.route(url, handler)](https://playwright.dev/docs/api/class-page#pagerouteurl-handler))
    * take precedence over browser context routes when request matches both handlers.
    *