Type and document cache and cacheSize opts

README.md

@@ -85,6 +85,8 @@ With 10 simultaneous downloads. Retrying each one to a max of 10.
 - `auto`: <[boolean][]> Whether or not to start the request automatically or wait for a `request.start()` call (useful when chaining events you want to fire in order). **Default**: `true`
 - `size`: <[number][]> Number of bytes to stream off the response.
 - `hash`: <[string][]> Hash algorithm to use to create a [crypto.Hash][] instance computing the stream hash.
+- `cache`: <[number][]> Whether or not to use an in-memory cache to enable read-aheads of pending chunks.
+- `cacheSize`: <[boolean][]> Custom maximum cache size (bytes).
 - `use`: <[object][]> Key-value pairs of middlewares with which to pipe the response object through. keys are [strings][string], values are [Transformer generating functions](#usemiddlewarefn) (Alternatively, use the [xget.use()](#xgetuse) method).
 - `with`: <[object][]> Key-value pairs of middlewares with which to pipe the dataslice object through. keys are [strings][string], values are [functions][function] whose return values are accessible within the [store](#storestack). (Alternatively, use the [xget.with()](#xgetwith) method).
 - `headHandler`: <[HeadHandler](#headhandler)> An interceptor for the initial HEAD data, useful for programmatically defining a range offset;

typings/index.d.ts

@@ -52,6 +52,8 @@ declare namespace xget {
     with: WithMiddlewareFn;
     start: number;
     chunks: number;
+    cache: boolean;
+    cacheSize: number;
     retries: number;
     timeout: number;
     headHandler: HeadHandler;