Add VAD and keyword spotting for the Node package with WebAssembly (#1286)

scripts/nodejs/.gitignore

@@ -1,2 +1,4 @@
 node_modules
 jslint.mjs
+sherpa-onnx-*.js
+sherpa-onnx-*.wasm

scripts/nodejs/index.js

@@ -4,6 +4,9 @@
 const wasmModule = require('./sherpa-onnx-wasm-nodejs.js')();
 const sherpa_onnx_asr = require('./sherpa-onnx-asr.js');
 const sherpa_onnx_tts = require('./sherpa-onnx-tts.js');
+const sherpa_onnx_kws = require('./sherpa-onnx-kws.js');
+const sherpa_onnx_wave = require('./sherpa-onnx-wave.js');
+const sherpa_onnx_vad = require('./sherpa-onnx-vad.js');
 
 function createOnlineRecognizer(config) {
   return sherpa_onnx_asr.createOnlineRecognizer(wasmModule, config);
@@ -17,10 +20,35 @@ function createOfflineTts(config) {
   return sherpa_onnx_tts.createOfflineTts(wasmModule, config);
 }
 
+function createKws(config) {
+  return sherpa_onnx_kws.createKws(wasmModule, config);
+}
+
+function createCircularBuffer(capacity) {
+  return new sherpa_onnx_vad.CircularBuffer(capacity, wasmModule);
+}
+
+function createVad(config) {
+  return sherpa_onnx_vad.createVad(wasmModule, config);
+}
+
+function readWave(filename) {
+  return sherpa_onnx_wave.readWave(filename, wasmModule);
+}
+
+function writeWave(filename, data) {
+  sherpa_onnx_wave.writeWave(filename, data, wasmModule);
+}
+
 // Note: online means streaming and offline means non-streaming here.
 // Both of them don't require internet connection.
 module.exports = {
   createOnlineRecognizer,
   createOfflineRecognizer,
   createOfflineTts,
+  createKws,
+  readWave,
+  writeWave,
+  createCircularBuffer,
+  createVad,
 };