ParseLenient=new RegExp((this._dayOfMonthOrdinalParse.source||this._ordinalParse.source)+"|"+/\d{1,2}/.source)},pt.eras=function(e,a){for(var t,s=this._eras||ua("en")._eras,n=0,r=s.length;n<r;++n){switch(typeof s[n].since){case"string":t=M(s[n].since).startOf("day"),s[n].since=t.valueOf();break}switch(typeof s[n].until){case"undefined":s[n].until=1/0;break;case"string":t=M(s[n].until).startOf("day").valueOf(),s[n].until=t.valueOf();break}}return s},pt.erasParse=function(e,a,t){var s,n,r,d,i,_=th...

against the value of the switch expression.
In a type switch, the cases contain types that are compared against the
type of a specially annotated switch expression.
The switch expression is evaluated exactly once in a switch statement.
</p>

<h4 id="Expression_switches">Expression switches</h4>

<p>
In an expression switch,
the switch expression is evaluated and

* Switch default etcd version to 3.0.14. ([#36229](https://github.com/kubernetes/kubernetes/pull/36229), [@wojtek-t](https://github.com/wojtek-t))
    * Switch default storage backend flag in apiserver to `etcd3` mode.

- Kube-apiserver: fixes a 1.27+ regression in watch stability by serving watch requests without a resourceVersion from the watch cache by default, as in <1.27 (disabling the change in #115096 by default). This mitigates the impact of an etcd watch bug (https://github.com/etcd-io/etcd/pull/17555). If the 1.27 change in #115096 to serve these requests from underlying storage is still desired despite the impact on watch stability, it can be re-enabled with a `WatchFromStorageWithoutResourceVersion`...

* `list`/`watch` API requests with a `fieldSelector` that specifies `metadata.name` can now be authorized as requests for an individual...

([#58185](https://github.com/kubernetes/kubernetes/pull/58185), [@caesarxuchao](https://github.com/caesarxuchao))

* Using kubectl gcp auth plugin with a Google Service Account to authenticate to a cluster now additionally requests a token with the  "userinfo.email" scope. This way, users can write ClusterRoleBindings/RoleBindings with the email address of the service account directly. (This is a breaking change if the numeric uniqueIDs of the Google service accounts were being used in RBAC...

- Client-go: Clients can request protobuf and json and correctly negotiate with the server for JSON for CRD objects, allowing all client libraries to request protobuf if it is available.  If an error occurs negotiating a watch with the server, the error is immediately return by the client `Watch()` method instead of being sent as an `Error` event on the watch stream. ([#84692](https://github.com/kubernetes/kubernetes/pull/84692), [@smarterclayton](https://github.com/smarterclayton))...

    * setting `KUBE_PROXY_DAEMONSET=true` in kube-up will now set a `node.kubernetes.io/kube-proxy-ds-ready=true` label on new nodes. In v1.16, the kube-proxy daemonset add-on will switch to using that label as a node selector.
    * In 1.16, the masq-agent daemonset add-on will switch to using `node.kubernetes.io/masq-agent-ds-ready` as a node selector.

- client-go and kubectl no longer write cached discovery files with world-accessible file permissions. ([#77874](https://github.com/kubernetes/kubernetes/pull/77874), [@yuchengwu](https://github.com/yuchengwu))

        * Switch to basing our image of Elasticsearch in fluentd-elasticsearch addon off the official one
        * Switch to the official image of Kibana in fluentd-elasticsearch addon
        * Use StatefulSet for Elasticsearch instead of ReplicationController, with persistent volume claims