feature: expose page.on('networkidle0') and page.on('networkidle2') events

[aslushnikov]

This has been requested quite a few times on the bugtracker already.

As a workaround, network idleness can be emulated on the puppeteer-side.

[paulirish]

A few notes for anyone else impatient for these first-class events.

The can be emulated link above is useful if you need different idleness parameters (# of requests, ms of time).

Alternatively, if you want a basic page.on('networkidle0', fn) event, a hacky solution is to drop down to the protocol:

page._client.on('Page.lifecycleEvent', e => {
	// networkidle0 => 'networkIdle', networkidle2 => 'networkAlmostIdle'
    if (e.name === 'networkIdle') fn()
});

Standard disclaimers about using the protocol directly (this may break unexpectedly) apply.

[aslushnikov]

@paulirish the lifecycle events are per frame, so the hacky way doesn't really work

[rob4629]

Any updates on this?

[tjenkinson]

I opened this PR which should help with this.