date modification for playwright

date-stub.js

var _Date = null;
var _ticks;

function restoreDate() {
  if (!_Date) {
    return;
  }
  Date = _Date;
}

function replaceDate(ticks) {
  _ticks = ticks;
  if (_Date) {
    return;
  }

  _Date = Date;

  // set Date ctor to always return same date, unless called with parameters
  Date = function (...args) {
    if (args?.length) {
      return new _Date(...args);
    }
    return new _Date(_ticks);
  };

  Object.getOwnPropertyNames(_Date).forEach(function (name) {
    Date[name] = _Date[name];
  });
}