Class CachableSource<T>

The source of a ReadableStream that queues items only when a timed cache becomes invalid.

See

• StorageCache
• CachableStream:class

Example

Caching for 30 minutes.

const cache = new StorageCache(
  localStorage,
  'my-cache',
  30 * 60_000
)

let i = 0
const stream = new ReadableStream(
  new CachableSource<number>(
    cache,
    ['numbers'],
    () => ++i
  )
)

stream.pipeTo(write(console.info))
// 1

await setTimeout(30 * 60_000))
// 2
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Example

Manually clearing cache.

const cache = new StorageCache(
  localStorage,
  'my-cache',
  30 * 60_000
)

let i = 0
const source = new CachableSource<number>(
  cache,
  ['numbers'],
  () => ++i
)

const stream = new ReadableStream(source)

stream.pipeTo(write(console.info))
// 1

source.clear()
// 2
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