@loopback/docs
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Documentation for LoopBack 4
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Markdown
lang: en
title: 'API docs: http-caching-proxy.proxyoptions.ttl'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/apidocs.http-caching-proxy.proxyoptions.ttl.html
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[Home](./index.md) > [@loopback/http-caching-proxy](./http-caching-proxy.md) > [ProxyOptions](./http-caching-proxy.proxyoptions.md) > [ttl](./http-caching-proxy.proxyoptions.ttl.md)
## ProxyOptions.ttl property
How long to keep snapshots before making a new request to the backend. The value is in milliseconds.
Default: one day
<b>Signature:</b>
```typescript
ttl?: number;
```