code: function has(name) {
      validateArgumentsLength(arguments.length, 1);
      var entries = getInternalParamsState(this).entries;
      var key = name + '';
      var i = 0;
      while (i < entries.length) if (entries[i++].key === key) return true;
      return false;
    }
docs: `URLSearchParams.prototype.has` method https://url.spec.whatwg.org/#dom-urlsearchparams-has