feat: support web worker env - #467

amplitude.getInstance().init(API_KEY, USER_ID);
const worker = new Worker('worker.js');

document.getElementById('btn-main').addEventListener('click', () => {
  amplitude.getInstance().logEvent('btn-main:click');
  worker.postMessage({
    trigger: 'btn-main:click',
    ampl: {
      userId: amplitude.getInstance().getUserId(),
      deviceId: amplitude.getInstance().getDeviceId(),
      sessionId: amplitude.getInstance().getSessionId(),
    },
  });
});

importScripts('/amplitude.js');
amplitude.getInstance().init(API_KEY);

self.onmessage = (event) => {
  const { ampl } = event.data;
  let result = [];
  for (var i = 0; i < 10000; i += 1) {
    for (var j = 0; j < 10000; j += 1) {
      if (!result[i]) {
        result[i] = [];
      }
     result[i][j] = i + j;
    }
  }
  const last = result[i - 1][j - 1];
  amplitude.getInstance().setSessionId(ampl.sessionId);
  amplitude.getInstance().setDeviceId(ampl.deviceId);
  amplitude.getInstance().setUserId(ampl.userId);
  amplitude.getInstance().logEvent('worker-matrix:complete', { result: last });
};