Why are the views in my polymer app not getting loaded? - polymer-2.x

Question

I am working on creating a Polymer app for a pet project, using the Polymer Starter Kit, and modifying it to add horizontal toolbar, background images, etc. So far, everything has worked fine except the links in the app-toolbar do not update the "view" when I click on them.
All my debugging so far points me in the direction of the "page" property. I believe this is not getting updated or is null, causing the view to default to "about" (which is View-2 as per the starter kit) as specified in the _routePageChanged observer method.
I tried using the debugger on DevTools on Chrome, but being new to this, I'm not very clear if I did it correctly. I just kept going in and out of hundred of function calls.
I am copying relevant parts of the app-shell.
Please help or at least point me in the right direction; I've been trying to fix this since 2 days. Thank you!
<app-location
route="{{route}}">
</app-location>
<app-route
route="{{route}}"
pattern=":view"
data="{{routeData}}"
tail="{{subroute}}">
</app-route>
<!-- Main content -->
<app-header-layout has-scrolling-region>
<app-header slot="header" class="main-header" condenses effects="waterfall">
<app-toolbar class="logo"></app-toolbar>
<app-toolbar class="tabs-bar" hidden$="{{!wideLayout}}">
<paper-tabs selected="[[selected]]" attr-for-selected="name">
<paper-tab>Home</paper-tab>
<paper-tab>About Us</paper-tab>
<paper-tab>Pricing</paper-tab>
</paper-tabs>
</app-toolbar>
</app-header>
<iron-pages
selected="[[page]]"
attr-for-selected="name"
fallback-selection="view404"
role="main">
<my-view1 name="home"></my-view1>
<my-view2 name="about"></my-view2>
<my-view3 name="pricing"></my-view3>
<my-view404 name="view404"></my-view404>
</iron-pages>
</app-header-layout>
</app-drawer-layout>
<script>
class MyApp extends Polymer.Element {
static get is() { return 'my-app'; }
static get properties() {
return {
page: {
type: String,
reflectToAttribute: true,
observer: '_pageChanged'
},
wideLayout: {
type: Boolean,
value: false,
observer: 'onLayoutChange'
},
items: {
type: Array,
value: function() {
return ['Home', 'About', 'Pricing', 'Adults', 'Contact'];
}
},
routeData: Object,
subroute: String,
// This shouldn't be neccessary, but the Analyzer isn't picking up
// Polymer.Element#rootPath
// rootPath: String,
};
}
static get observers() {
return [
'_routePageChanged(routeData.page)',
];
}
_routePageChanged(page) {
// If no page was found in the route data, page will be an empty string.
// Default to 'view1' in that case.
this.page = page || 'about';
console.log('_routePageChange');
// Close a non-persistent drawer when the page & route are changed.
if (!this.$.drawer.persistent) {
this.$.drawer.close();
}
}
_pageChanged(page) {
// Load page import on demand. Show 404 page if fails
var resolvedPageUrl = this.resolveUrl(page + '.html');
Polymer.importHref(
resolvedPageUrl,
null,
this._showPage404.bind(this),
true);
}
_showPage404() {
this.page = 'view404';
}
_onLayoutChange(wide) {
var drawer = this.$.drawer;
if (wide && drawer.opened){
drawer.opened = false;
}
}
}
window.customElements.define(MyApp.is, MyApp);
</script>
Here's a snapshot of the page when I click on the "Home" link.
Snapshot of the page

Answer 1

I have fixed the same issue on my app, page observed functions like:
static get properties() { return {
page:{
type:String,
reflectToAttribute:true,
observer: '_pageChanged'},
...
_pageChanged(page, oldPage) {
if (page != null) {
if (page === "home" ) {
this.set('routeData.page', "");
} else {
this.set('routeData.page', page);
}
.......
}
}
Honestly, I am still trying to find the better solution. Because I have users page and I could not manage to able to indexed at google search results. This only keeps synchronized the iron-pages and address link.