amplitude-snippet.js

/**
 * Imported in client browser via <script> tag
 * Async capabilities: Interally creates stubbed window.amplitude object until real SDK loaded
 * Stubbed functions keep track of funciton calls and their arguments
 * These are sent once real SDK loaded through another <script> tag
 */
(function (window, document) {
  var amplitude = window.amplitude || { _q: [], _iq: {} };
  var as = document.createElement('script');
  as.type = 'text/javascript';
  // Don't edit as.integrity, it is tracked by semantic-release-bot during releases
  as.integrity = 'sha384-BFhCFljbuMkiF3EzVMjFk+zh1dxo9ckGpYDTPLhKibORvR5LPenaPdnGFD9VNZJr';
  as.crossOrigin = 'anonymous';
  as.async = true;
  // Don't edit as.src, it is tracked by semantic-release-bot during releases
  as.src = 'https://cdn.amplitude.com/libs/amplitude-7.3.3-min.gz.js';
  as.onload = function () {
    if (!window.amplitude.runQueuedFunctions) {
      console.log('[Amplitude] Error: could not load SDK');
    }
  };
  var s = document.getElementsByTagName('script')[0];
  s.parentNode.insertBefore(as, s);
  function proxy(obj, fn) {
    obj.prototype[fn] = function () {
      this._q.push([fn].concat(Array.prototype.slice.call(arguments, 0)));
      return this;
    };
  }
  var Identify = function () {
    this._q = [];
    return this;
  };
  var identifyFuncs = ['add', 'append', 'clearAll', 'prepend', 'set', 'setOnce', 'unset'];
  for (var i = 0; i < identifyFuncs.length; i++) {
    proxy(Identify, identifyFuncs[i]);
  }
  amplitude.Identify = Identify;
  var Revenue = function () {
    this._q = [];
    return this;
  };
  var revenueFuncs = ['setProductId', 'setQuantity', 'setPrice', 'setRevenueType', 'setEventProperties'];
  for (var j = 0; j < revenueFuncs.length; j++) {
    proxy(Revenue, revenueFuncs[j]);
  }
  amplitude.Revenue = Revenue;
  var funcs = [
    'init',
    'logEvent',
    'logRevenue',
    'setUserId',
    'setUserProperties',
    'setOptOut',
    'setVersionName',
    'setDomain',
    'setDeviceId',
    'enableTracking',
    'setGlobalUserProperties',
    'identify',
    'clearUserProperties',
    'setGroup',
    'logRevenueV2',
    'regenerateDeviceId',
    'groupIdentify',
    'onInit',
    'logEventWithTimestamp',
    'logEventWithGroups',
    'setSessionId',
    'resetSessionId',
  ];
  function setUpProxy(instance) {
    function proxyMain(fn) {
      instance[fn] = function () {
        instance._q.push([fn].concat(Array.prototype.slice.call(arguments, 0)));
      };
    }
    for (var k = 0; k < funcs.length; k++) {
      proxyMain(funcs[k]);
    }
  }
  setUpProxy(amplitude);
  amplitude.getInstance = function (instance) {
    instance = (!instance || instance.length === 0 ? '$default_instance' : instance).toLowerCase();
    if (!amplitude._iq.hasOwnProperty(instance)) {
      amplitude._iq[instance] = { _q: [] };
      setUpProxy(amplitude._iq[instance]);
    }
    return amplitude._iq[instance];
  };
  window.amplitude = amplitude;
})(window, document);