Estou com a versão 3.5.0 do Ionic
Na estrutura que o Ionic gerou estou editando um arquivo chamado src/pages/home.html e o Header está funcionando.
<ion-header class="bar-stable">
<ion-navbar>
<ion-title>
Alura Car
</ion-title>
</ion-navbar>
</ion-header>
Mas se eu usar a tag recebo a seguinte mensagem de erro :
Unhandled Promise rejection: Template parse errors:
'ion-header-bar' is not a known element:
1. If 'ion-header-bar' is an Angular component, then verify that it is part of this module.
2. If 'ion-header-bar' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("[ERROR ->]<ion-header-bar class="bar-stable">
<ion-navbar>
<ion-title>
"): ng:///AppModule/HomePage.html@0:0 ; Zone: <root> ; Task: Promise.then ; Value: Error: Template parse errors: