js到native的array类型转换有没有示例代码？

napi_value output_buffer; 
void *output_ptr = NULL; 
napi_create_arraybuffer(env, 20, &output_ptr, &output_buffer); 
napi_typedarray_type type; 
napi_value output_array; 
napi_create_typedarray(env, type, 20, output_buffer, 0, &output_array); 
uint8_t *input_bytes = (uint8_t *)(“123456789-0123456789”); 
uint8_t *output_bytes = (uint8_t *)(output_ptr); 
for (int i = 0; i < 20; i++) { 
    OH_LOG_Print(LOG_APP, LOG_WARN, 0xFFFF, “testNapi”, “arraybuffer input_bytes %{public}d”, input_bytes[i]); 
    output_bytes[i] = (uint8_t)(input_bytes[i] * 2); 
    OH_LOG_Print(LOG_APP, LOG_WARN, 0xFFFF, “testNapi”, “arraybuffer output_bytes %{public}d”, output_bytes[i]); 
} 
return output_array;