Add support for dictd and StarDict dictionaries

README.md

@@ -284,6 +284,36 @@ The TTS module doesn't directly handle speech output. Rather, its methods return
 
 The SSML attributes `ssml:ph` and `ssml:alphabet` are supported. There's no support for PLS and CSS Speech.
 
+### Offline Dictionaries
+
+The `dict.js` module can be used to load dictd and StarDict dictionaries. Usage:
+
+```js
+import { StarDict } from './dict.js'
+import { inflate } from 'your inflate implementation'
+
+const { ifo, dz, idx, syn } = { /* `File` (or `Blob`) objects */ }
+const dict = new StarDict()
+await dict.loadIfo(ifo)
+await dict.loadDict(dz, inflate)
+await dict.loadIdx(idx)
+await dict.loadSyn(syn)
+
+// look up words
+const query = '...'
+await dictionary.lookup(query)
+await dictionary.synonyms(query)
+```
+
+Note that you must supply your own `inflate` function. Here is an example using [fflate](https://github.com/101arrowz/fflate):
+```js
+const inflate = data => new Promise(resolve => {
+    const inflate = new fflate.Inflate()
+    inflate.ondata = data => resolve(data)
+    inflate.push(data)
+})
+```
+
 ### OPDS
 
 The `opds.js` module can be used to implement OPDS clients. It can convert OPDS 1.x documents to OPDS 2.0: