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CDPSession

CDPSession 实例用于讨论原始 Chrome Devtools 协议:

The CDPSession instances are used to talk raw Chrome Devtools Protocol:

  • 协议方法可以通过 session.send 方法调用。

    protocol methods can be called with session.send method.

  • 可以使用 session.on 方法订阅协议事件。

    protocol events can be subscribed to with session.on method.

有用的链接:

Useful links:

const client = await page.context().newCDPSession(page);
await client.send('Animation.enable');
client.on('Animation.animationCreated', () => console.log('Animation created!'));
const response = await client.send('Animation.getPlaybackRate');
console.log('playback rate is ' + response.playbackRate);
await client.send('Animation.setPlaybackRate', {
playbackRate: response.playbackRate / 2
});

方法

Methods

detach

Added in: v1.8 cdpSession.detach

从目标分离 CDPSession。一旦分离,CDPSession 对象将不会触发任何事件,也不能用于发送消息。

Detaches the CDPSession from the target. Once detached, the CDPSession object won't emit any events and can't be used to send messages.

用法

Usage

await cdpSession.detach();

send

Added in: v1.8 cdpSession.send

用法

Usage

await cdpSession.send(method);
await cdpSession.send(method, params);

参数

Arguments

协议方法名称。

Protocol method name.

可选方法参数。

Optional method parameters.

返回

Returns