wasm-bindgen/examples/webaudio/index.js

import('./webaudio').then(rust_module => {
  let fm = null;

  const play_button = document.getElementById("play");
  play_button.addEventListener("click", event => {
    if (fm === null) {
      fm = new rust_module.FmOsc();
      fm.set_note(50);
      fm.set_fm_frequency(0);
      fm.set_fm_amount(0);
      fm.set_gain(0.8);
    } else {
      fm.free();
      fm = null;
    }
  });

  const primary_slider = document.getElementById("primary_input");
  primary_slider.addEventListener("input", event => {
    if (fm) {
      fm.set_note(event.target.value);
    }
  });

  const fm_freq = document.getElementById("fm_freq");
  fm_freq.addEventListener("input", event => {
    if (fm) {
      fm.set_fm_frequency(event.target.value);
    }
  });

  const fm_amount = document.getElementById("fm_amount");
  fm_amount.addEventListener("input", event => {
    if (fm) {
      fm.set_fm_amount(event.target.value);
    }
  });
});