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prerender-memory-cache

library1.0.2jsnpmunverified

A lightweight in-memory cache plugin for Prerender server, version 1.0.2. It caches rendered HTML pages in memory to avoid re-rendering the same URL repeatedly, improving performance for high-traffic sites. Configurable max cache size (default 100) and TTL (default 60 seconds). No external dependencies, integrates as a middleware. Maintenance mode with no recent updates.

storage

npm install prerender-memory-cache

package ↗

INSTALL

IMPORT

SIG · PRERENDER-MEMORY-C

prerender-memory-cache

storagejavascriptv1.0.2

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

default

✓ require('prerender-memory-cache')

✗ import prerenderMemoryCache from 'prerender-memory-cache'

CommonJS module; does not export an ESM default.

Prerender plugin usage

✓ server.use(require('prerender-memory-cache'))

✗ server.use(prerenderMemoryCache())

Plugin is used as a reference function, not invoked.

Configuration via env vars

✓ process.env.CACHE_MAXSIZE = '1000'; process.env.CACHE_TTL = '600'

✗ const config = { CACHE_MAXSIZE: 1000, CACHE_TTL: 600 }

No programmatic API; must set environment variables before requiring the plugin.

Sets up a Prerender server with in-memory caching middleware. The cache is enabled by default with TTL=60s and max 100 items.

const prerender = require('prerender'); const server = prerender(); server.use(require('prerender-memory-cache')); server.start();

Debug

Known issues

gotchaCache configuration must be set via environment variables BEFORE requiring the module. Setting them later has no effect.

fix

Set process.env.CACHE_MAXSIZE and process.env.CACHE_TTL before any require of prerender-memory-cache.

affects: >=1.0.0

gotchaCache does not invalidate based on external events; stale content is served until TTL expires.

fix

Set a reasonable TTL or disable cache for dynamic pages.

affects: >=1.0.0

gotchaCache stores responses in memory of a single Node process. Not suitable for multi-process or clustered deployments without a shared cache layer.

fix

Use a distributed cache like Redis for clustered environments.

affects: >=1.0.0

Errors

Common errors & fixes

Error: Cannot find module 'prerender-memory-cache'

Prerender not installed or npm install didn't run in the Prerender server directory.

fix

Run 'npm install prerender-memory-cache --save' from the Prerender server root.

TypeError: server.use is not a function

Using import syntax or not using Prerender's server object.

fix

Ensure you're calling server.use on a proper Prerender server instance: const server = prerender();

Cache not serving cached responses

Environment variables set after module is loaded, or TTL expired.

fix

Set CACHE_MAXSIZE and CACHE_TTL before requiring the module, or increase TTL.

Upgrade

Version history

1.0.2latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

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Resources

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