{{% notice %}}

<i class="fas fa-language"></i> Page being translated from

English to Simplified Chinese. Do you speak Simplified? Help us to translate

it by sending us pull requests!

{{% /notice %}}

In Selenium 4, new Evented APIs were introduced that

allow users to be able to capture events from the

browser as they happen rather than using the

traditional approach of Request/Response that

WebDriver has used for other APIs.

Internally WebDriver will create a WebSocket connection

to the browser for events and commands to be transmitted.

The following list of APIs will be growing as the Selenium

project works through supporting real world use cases. If there

is a missing API, please raise a [feature request](https://github.com/SeleniumHQ/selenium/issues/new?assignees=&labels=&template=feature.md).

Mutation Observation is the ability to capture events via

WebDriver BiDi when there are DOM mutations on a specific

element in the DOM.