Function instrumentEntryPoints

3p/environment.js:167–210

* Replace timers with variants that can be throttled. * @param {!Window} win

(win)

 * @param {!Window} win
 */
function instrumentEntryPoints(win) {
  // Change setTimeout to respect a minimum timeout.
  const {setTimeout} = win;
  win.setTimeout = function (fn, time) {
    time = minTime(time);
    arguments[1] = time;
    return setTimeout.apply(this, arguments);
  };
  // Implement setInterval in terms of setTimeout to make
  // it respect the same rules
  win.setInterval = function (fn) {
    const id = intervalId++;
    const args = Array.prototype.slice.call(arguments);
    /**
     * @return {*}
     * @suppress {uselessCode}
     */
    function wrapper() {
      next();
      if (typeof fn == 'string') {
        // Handle rare and dangerous string arg case.
        return (0, win.eval) /*NOT OK but whatcha gonna do.*/
          .call(win, fn); // lgtm [js/useless-expression]
      } else {
        return fn.apply(this, arguments);
      }
    }
    args[0] = wrapper;
    /**
     *
     */
    function next() {
      intervals[id] = win.setTimeout.apply(win, args);
    }
    next();
    return id;
  };
  const {clearInterval} = win;
  win.clearInterval = function (id) {
    clearInterval(id);
    win.clearTimeout(intervals[id]);
    delete intervals[id];
  };
}

/**
 * Blackhole the legacy popups since they should never be used for anything.