---
name: "up:network:late"
area: "API"
kind: "DOM event"
parent: "up.network module"
url: "https://unpoly.com/api/up:network:late"
---
<nav aria-label="Unpoly docs">[All docs](https://unpoly.com/index.md) · [up.network module](https://unpoly.com/api/up.network.md)</nav>

# up:network:late

This event is [emitted](https://unpoly.com/api/up.emit.md) when [requests](https://unpoly.com/api/up.request.md) are taking long to finish loading.

<nav aria-label="Guides">

- [Learn: Handling network issues](https://unpoly.com/learn/network-issues.md#slow-server-responses)

</nav>

## Timing {#timing}

By default, Unpoly will wait 400 ms for a request to finish before emitting `up:network:late`. You may configure this delay [globally](https://unpoly.com/api/up.network.config.md#config.lateDelay), for [individual links](https://unpoly.com/api/up-follow.md#up-late-delay), or for [specific requests](https://unpoly.com/api/up.request.md#options.lateDelay).

Once all responses have been received, an [`up:network:recover`](https://unpoly.com/api/up:network:recover.md) event will be emitted.

If additional requests are made while Unpoly is already busy waiting, **no** additional `up:network:late` events will be emitted.

## Default behavior {#default-behavior}

By default, Unpoly will show a [progress bar](https://unpoly.com/learn/progress-bar.md) while late requests are pending. You can [disable](https://unpoly.com/learn/progress-bar.md#disabling) the progress bar or [implement custom loading indicators](https://unpoly.com/learn/progress-bar.md#custom-implementation).