Nativescript angular

<3
NATIVESCRIPT DEVELOPER DAY EUROPE
CHRIS NORING
GOOGLE DEVELOPER EXPERT
NATIVESCRIPT DEVELOPER EXPERT
@CHRIS_NORING

STRUCTURE
STRUCTURE
▸ Set up
▸ Commands & Productivity Tools
▸ Project anatomy
▸ Components & Bindings
▸ Routing
▸ Forms
▸ Http
▸ Testing

SET UP
SET UP YOUR ANGULAR APPLICATION
▸ introducing nativescript-cli
▸ Scaffold
▸ an application tns create <App name>
▸ an Angular application
▸ tns create <App name> —ng
▸ tns create <App name> --template angular

COMMANDS & PRODUCTIVITY TOOLS
USEFUL COMMANDS
▸ Runs your project, tns run <android/ios>
▸ View available commands, tns help
▸ Adds target platforms, tns platform add <android/ios>
▸ Verify connected device is recognized, tns device
▸ Downloads and installs app package on device, tns deploy
<android/ios>

VS CODE PLUGINS
COMMANDS & PRODUCTIVITY TOOLS
Scaffolds Nativescript
component ,template
Test, CSS
Code completion
Helps with imports
Snippets
Support for inline
Templates

PROJECT ANATOMY
BOOTSTRAPPING
import { platformNativeScriptDynamic } from "nativescript-angular/platform";
Nativescript
Angular
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

PROJECT ANATOMY
ROOT MODULE - NATIVESCRIPT MODULE
@NgModule({
imports: [
NativeScriptModule,
AppRoutingModule
]
})
export class ApplicationModule {}
This one is needed
import { NativeScriptModule } from "nativescript-angular/nativescript.module";

PROJECT ANATOMY
ROOT MODULE - ROUTING SET UP
const routes: Routes = [
{ path: "", redirectTo: "/items", pathMatch: "full" },
{ path: "items", component: ItemsComponent },
{ path: "item/:id", component: ItemDetailComponent },
];
Deﬁning routes
@NgModule({
imports: [NativeScriptRouterModule.forRoot(Routes)],
exports: [NativeScriptRouterModule]
})
export class AppRoutingModule {}
Setting up separate routing module
@NgModule({
imports: [
NativeScriptModule,
AppRoutingModule
]
})
Importing our route module
Nativescripts version of the router
forRoot() as with Angular

COMPONENTS & BINDINGS
BINDINGS
▸ string interpolation {{}}
▸ attribute binding
▸ banana in a box
▸ event binding

INTERPOLATION
<Label [text]=“{{test | pipe }}”></Label>
ATTRIBUTE BINDING
<Label [text]=“test”></Label>
@Component({
template : `
<StackLayout class="page">
<Label [text]="test"></Label>
</StackLayout>
`
})
export class TestComponent {
test ="test me"
}

EVENT BINDING
@Component({
template : `
<StackLayout class="page">
<Label (tap)=“tapMe()” [text]="test"></Label>
</StackLayout>
`
})
export class TestComponent {
test ="test me"
tapMe() { }
}

BANANA IN A BOX
<StackLayout class=“page">
<TextField [(ngModel)]=“product”></TextField>
</StackLayout>
@Component({})
export class ProductComponent {
product =“”
}
@NgModule({
bootstrap: [
AppComponent
],
imports: [
NativeScriptFormsModule,
})

BASIC COMPONENTS
<Switch></Switch> Radio button
<Label></Label> Span, free text
<ListView></ListView> UL and LI
<TextField></TextField> <input type=“text”>
<Button></Button> <button></button>
<Image></Image> <img>
Check box
Missing

ROUTING
ROUTING - COMPONENT BASED
<Label pageTransition="ﬂip" [nsRouterLink]="['/item', item.id]" [text]="item.name"
class="list-group-item"></Label>
same ol router link preﬁxed with ns
<router-outlet></router-outlet> where to render the content

ROUTING
ROUTING - PAGE BASED
<page-router-outlet></page-router-outlet> One per app
<ActionBar title="My App" class="action-bar">
</ActionBar>
Native navigation, back
Programmatic navigationﬂipToNextPage() {
this.routerExtensions.navigate(["/main"], {
transition: { name: “ﬂip", duration: 2000, curve: “linear" }
});
} You change the entire page content

FORMS
TEMPLATE FORMS
<Button *ngIf="usernameModel.valid && passwordModel.valid"
(tap)="Save()"
text=“Save">
</Button>
Show ‘save’ button if both
fields are valid
ngForm is missing, which is
why we do this instead, per field
@NgModule({
imports: [
NativeScriptFormsModule,
]
})
<TextField required
#usernameModel="ngModel"
[(ngModel)]="username" >
</TextField>
<TextField required
#passwordModel="ngModel"
[(ngModel)]="password" >
</TextField>
Define the fields

FORMS
REACTIVE FORMS
constructor(
private formBuilder: FormBuilder) {
this.form = this.fb.group({
"name": ["", [Validators.required]]
});
}
Creating our form and ﬁelds
@NgModule({
imports: [
ReactiveFormsModule,
]
})
<StackLayout [formGroup]="form">
<TextField formControlName="name"></TextField>
<Label text="{{ form.get('name').value }}"></Label>
<Label text="Name value {{ form.get('name').status | json }}"></Label>
<Label text="Name status {{ form.value | json }}"></Label>
<Label text="Form status {{ form.status | json }}"></Label>
</StackLayout>

HTTP
PROMISE BASED HTTP
var http = require('http');
http.getString(“url”)
.then(
(str) => console.log(str),
(err) => console.error(err)
);
http.getJSON(“url")
.then(
(json) => console.log(json),
)
http.getImage(“path-to-file.png“)
.then(
(image) => console.log(image),
)
http.getFile(“path-to-file.txt“)
.then(
(file) => console.log(file),
)

HTTP
ANGULAR HTTP import { NativeScriptHttpModule }
from ‘nativescript-angular';
@NgModule({
imports : [.NativeScriptHttpModule ]
})
export class AppModule {}
import { Http } from '@angular/http';
class ProductService {
constructor(private http: Http) { }
getProducts() {
return this.http.get("url")
.map(result => JSON.parse(result.json()))
}
}
import 'rxjs/add/operator/map';
Inject Http service
Apply operators

TEST
SET UP & RUN TESTING
tns test init Creates app/tests, not in release builds
Creates a sample test
Installs the nativescript-unit-test-runner
npm i @types/jasmine --save-dev Install TypeScript typings
tns test <ios/android>
Run the tests
tns test <ios/android> --watch Run tests on code change
Generates component + test

TEST
TEST THE COMPONENTimport { TestBed, inject } from '@angular/core/testing';
import { ProductDetailComponent } from './product-detail.component';
describe('a product-detail component', () => {
let component: ProductDetailComponent;
});
Suite
Set upbeforeEach(() => {
TestBed.conﬁgureTestingModule({
providers: [
ProductDetailComponent
]
});
});
Set upbeforeEach(inject([ProductDetailComponent], (ProductDetailComponent) => {
component = ProductDetailComponent;
}));
Testit('should have an instance', () => {
expect(component).toBeDeﬁned();
});

NGZONE
CHANGE DETECTION NOT PICKED UP
Programmatically add view children
Using the FPS component
Changes are not picked up
Use NgZone
import {NgZone} from ‘@angular/core’;
@Component({})
export class SomeComponent {
constructor( private zone: NgZone ) {
}
doChange() {
this.zone.run(() => { this.prop = “new value”; })
}
}

SUMMARY
WE HAVE COVERED
▸ Set Up
▸ Components & Bindings
▸ Forms
▸ Routing
▸ Testing
▸ Http
▸ There are minor differences
▸ Nativescript truly embraces Angular

Nativescript angular

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