Ajax Framework Validation

<div class="card">
    <h:form>
        <p:messages id="msgs"/>

        <h:panelGrid columns="3" cellpadding="7" styleClass="mb-3">
            <p:outputLabel for="firstname" value="Firstname:"/>
            <p:inputText id="firstname" value="#{remoteValidationView.firstname}" required="true" label="Firstname">
                <f:validateLength minimum="2"/>
            </p:inputText>
            <p:message for="firstname" display="icon"/>

            <p:outputLabel for="lastname" value="Lastname:"/>
            <p:inputText id="lastname" value="#{remoteValidationView.lastname}" label="Lastname" required="true">
                <f:validateLength minimum="2"/>
                <p:ajax update="msgLastname" event="keyup"/>
            </p:inputText>
            <p:message for="lastname" id="msgLastname" display="icon"/>

        </h:panelGrid>

        <p:commandButton value="Save" update="@form" action="#{remoteValidationView.save}" icon="pi pi-check" />
    </h:form>
</div>