Add JavaScript API (WebAssembly) for Kokoro TTS 1.0 (#1809)

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

@@ -0,0 +1,40 @@
+// Copyright (c)  2025  Xiaomi Corporation (authors: Fangjun Kuang)
+
+const sherpa_onnx = require('sherpa-onnx');
+
+function createOfflineTts() {
+  let offlineTtsKokoroModelConfig = {
+    model: './kokoro-multi-lang-v1_0/model.onnx',
+    voices: './kokoro-multi-lang-v1_0/voices.bin',
+    tokens: './kokoro-multi-lang-v1_0/tokens.txt',
+    dataDir: './kokoro-multi-lang-v1_0/espeak-ng-data',
+    dictDir: './kokoro-multi-lang-v1_0/dict',
+    lexicon:
+        './kokoro-multi-lang-v1_0/lexicon-us-en.txt,./kokoro-multi-lang-v1_0/lexicon-zh.txt',
+    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 = 49;
+const speed = 1.0;
+const text =
+    '中英文语音合成测试。This is generated by next generation Kaldi using Kokoro without Misaki. 你觉得中英文说的如何呢？'
+
+const audio = tts.generate({text: text, sid: speakerId, speed: speed});
+tts.save('./test-kokoro-zh-en-49.wav', audio);
+console.log('Saved to test-kokoro-zh-en-49.wav successfully.');
+tts.free();