feat: implement Locators (#10305)

docs/api/puppeteer.locator.on.md

@@ -0,0 +1,27 @@
+---
+sidebar_label: Locator.on
+---
+
+# Locator.on() method
+
+#### Signature:
+
+```typescript
+class Locator {
+  on<K extends keyof LocatorEventObject>(
+    eventName: K,
+    handler: (event: LocatorEventObject[K]) => void
+  ): this;
+}
+```
+
+## Parameters
+
+| Parameter | Type                                                                             | Description |
+| --------- | -------------------------------------------------------------------------------- | ----------- |
+| eventName | K                                                                                |             |
+| handler   | (event: [LocatorEventObject](./puppeteer.locatoreventobject.md)\[K\]) =&gt; void |             |
+
+**Returns:**
+
+this