Add JavaScript (WebAssembly) API for Kokoro TTS models. (#1726)

nodejs-examples/README.md

@@ -42,6 +42,22 @@ node ./test-offline-speaker-diarization.js
 
 In the following, we demonstrate how to run text-to-speech.
 
+## ./test-offline-tts-kokoro-en.js
+
+[./test-offline-tts-kokoro-en.js](./test-offline-tts-kokoro-en.js) shows how to use
+[kokoro-en-v0_19](https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/kokoro-en-v0_19.tar.bz2)
+for text-to-speech.
+
+You can use the following command to run it:
+
+```bash
+wget https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/kokoro-en-v0_19.tar.bz2
+tar xf kokoro-en-v0_19.tar.bz2
+rm kokoro-en-v0_19.tar.bz2
+
+node ./test-offline-tts-kokoro-en.js
+```
+
 ## ./test-offline-tts-matcha-zh.js
 
 [./test-offline-tts-matcha-zh.js](./test-offline-tts-matcha-zh.js) shows how to use

nodejs-examples/test-offline-tts-kokoro-en.js

@@ -0,0 +1,37 @@
+// Copyright (c)  2025  Xiaomi Corporation (authors: Fangjun Kuang)
+
+const sherpa_onnx = require('sherpa-onnx');
+
+function createOfflineTts() {
+  let offlineTtsKokoroModelConfig = {
+    model: './kokoro-en-v0_19/model.onnx',
+    voices: './kokoro-en-v0_19/voices.bin',
+    tokens: './kokoro-en-v0_19/tokens.txt',
+    dataDir: './kokoro-en-v0_19/espeak-ng-data',
+    lengthScale: 1.0,
+  };
+  let offlineTtsModelConfig = {
+    offlineTtsKokoroModelConfig: offlineTtsKokoroModelConfig,
+    numThreads: 1,
+    debug: 1,
+    provider: 'cpu',
+  };
+
+  let offlineTtsConfig = {
+    offlineTtsModelConfig: offlineTtsModelConfig,
+    maxNumSentences: 1,
+  };
+
+  return sherpa_onnx.createOfflineTts(offlineTtsConfig);
+}
+
+const tts = createOfflineTts();
+const speakerId = 0;
+const speed = 1.0;
+const text =
+    'Today as always, men fall into two groups: slaves and free men. Whoever does not have two-thirds of his day for himself, is a slave, whatever he may be: a statesman, a businessman, an official, or a scholar.'
+
+const audio = tts.generate({text: text, sid: speakerId, speed: speed});
+tts.save('./test-kokoro-en.wav', audio);
+console.log('Saved to test-kokoro-en.wav successfully.');
+tts.free();