977 lines
31 KiB
HTML
977 lines
31 KiB
HTML
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<html lang="en"><head></head><body>
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<form id="mainForm" method="post" action="https://run.stackblitz.com/api/angular/v1?file=src/app/app.component.ts" target="_self"><input type="hidden" name="files[src/app/app.component.ts]" value="import { Component, OnInit } from '@angular/core';
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import { Item } from './item';
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@Component({
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selector: 'app-root',
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templateUrl: './app.component.html',
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styleUrls: ['./app.component.css']
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})
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export class AppComponent implements OnInit {
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canSave = true;
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isSpecial = true;
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isUnchanged = true;
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isActive = true;
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nullCustomer = null;
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currentCustomer = {
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name: 'Laura'
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};
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item: Item; // defined to demonstrate template context precedence
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items: Item[];
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currentItem: Item;
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// trackBy change counting
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itemsNoTrackByCount = 0;
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itemsWithTrackByCount = 0;
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itemsWithTrackByCountReset = 0;
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itemIdIncrement = 1;
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currentClasses: {};
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currentStyles: {};
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ngOnInit() {
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this.resetItems();
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this.setCurrentClasses();
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this.setCurrentStyles();
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this.itemsNoTrackByCount = 0;
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}
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setUppercaseName(name: string) {
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this.currentItem.name = name.toUpperCase();
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}
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setCurrentClasses() {
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// CSS classes: added/removed per current state of component properties
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this.currentClasses = {
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saveable: this.canSave,
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modified: !this.isUnchanged,
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special: this.isSpecial
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};
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}
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setCurrentStyles() {
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// CSS styles: set per current state of component properties
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this.currentStyles = {
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'font-style': this.canSave ? 'italic' : 'normal',
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'font-weight': !this.isUnchanged ? 'bold' : 'normal',
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'font-size': this.isSpecial ? '24px' : '12px'
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};
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}
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isActiveToggle() {
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this.isActive = !this.isActive;
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}
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giveNullCustomerValue() {
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this.nullCustomer = 'Kelly';
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}
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resetItems() {
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this.items = Item.items.map(item => item.clone());
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this.currentItem = this.items[0];
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this.item = this.currentItem;
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}
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resetList() {
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this.resetItems();
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this.itemsWithTrackByCountReset = 0;
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this.itemsNoTrackByCount = ++this.itemsNoTrackByCount;
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}
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changeIds() {
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this.items.forEach(i => i.id += 1 * this.itemIdIncrement);
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this.itemsWithTrackByCountReset = -1;
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this.itemsNoTrackByCount = ++this.itemsNoTrackByCount;
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this.itemsWithTrackByCount = ++this.itemsWithTrackByCount;
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}
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clearTrackByCounts() {
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this.resetItems();
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this.itemsNoTrackByCount = 0;
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this.itemsWithTrackByCount = 0;
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this.itemIdIncrement = 1;
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}
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trackByItems(index: number, item: Item): number { return item.id; }
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trackById(index: number, item: any): number { return item.id; }
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getValue(target: EventTarget): string {
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return (target as HTMLInputElement).value;
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}
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}
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/*
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Copyright Google LLC. All Rights Reserved.
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Use of this source code is governed by an MIT-style license that
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can be found in the LICENSE file at https://angular.io/license
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*/"><input type="hidden" name="files[src/app/app.module.ts]" value="import { BrowserModule } from '@angular/platform-browser';
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import { NgModule } from '@angular/core';
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import { FormsModule } from '@angular/forms'; // <--- JavaScript import from Angular
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import { AppComponent } from './app.component';
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import { ItemDetailComponent } from './item-detail/item-detail.component';
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import { ItemSwitchComponents } from './item-switch.component';
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@NgModule({
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declarations: [
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AppComponent,
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ItemDetailComponent,
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ItemSwitchComponents
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],
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imports: [
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BrowserModule,
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FormsModule // <--- import into the NgModule
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],
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providers: [],
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bootstrap: [AppComponent]
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})
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export class AppModule { }
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/*
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Copyright Google LLC. All Rights Reserved.
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Use of this source code is governed by an MIT-style license that
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can be found in the LICENSE file at https://angular.io/license
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*/"><input type="hidden" name="files[src/app/item-detail/item-detail.component.ts]" value="import { Component, Input } from '@angular/core';
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import { Item } from '../item';
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@Component({
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selector: 'app-item-detail',
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templateUrl: './item-detail.component.html',
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styleUrls: ['./item-detail.component.css']
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})
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export class ItemDetailComponent {
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@Input() item: Item;
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constructor() { }
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}
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/*
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Copyright Google LLC. All Rights Reserved.
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Use of this source code is governed by an MIT-style license that
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can be found in the LICENSE file at https://angular.io/license
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*/"><input type="hidden" name="files[src/app/item-switch.component.ts]" value="import { Component, Input } from '@angular/core';
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import { Item } from './item';
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@Component({
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selector: 'app-stout-item',
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template: `I'm a little {{item.name}}, short and stout!`
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})
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export class StoutItemComponent {
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@Input() item: Item;
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}
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@Component({
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selector: 'app-best-item',
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template: `This is the brightest {{item.name}} in town.`
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})
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export class BestItemComponent {
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@Input() item: Item;
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}
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@Component({
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selector: 'app-device-item',
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template: `Which is the slimmest {{item.name}}?`
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})
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export class DeviceItemComponent {
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@Input() item: Item;
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}
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@Component({
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selector: 'app-lost-item',
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template: `Has anyone seen my {{item.name}}?`
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})
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export class LostItemComponent {
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@Input() item: Item;
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}
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@Component({
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selector: 'app-unknown-item',
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template: `{{message}}`
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})
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export class UnknownItemComponent {
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@Input() item: Item;
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get message() {
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return this.item && this.item.name ?
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`${this.item.name} is strange and mysterious.` :
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'A mystery wrapped in a fishbowl.';
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}
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}
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export const ItemSwitchComponents =
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[ StoutItemComponent, BestItemComponent, DeviceItemComponent, LostItemComponent, UnknownItemComponent ];
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/*
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Copyright Google LLC. All Rights Reserved.
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Use of this source code is governed by an MIT-style license that
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can be found in the LICENSE file at https://angular.io/license
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*/"><input type="hidden" name="files[src/app/item.ts]" value="export class Item {
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static nextId = 0;
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static items: Item[] = [
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new Item(
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null,
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'Teapot',
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'stout'
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),
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new Item(1, 'Lamp', 'bright'),
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new Item(2, 'Phone', 'slim' ),
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new Item(3, 'Television', 'vintage' ),
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new Item(4, 'Fishbowl')
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];
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constructor(
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public id?: number,
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public name?: string,
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public feature?: string,
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public url?: string,
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public rate = 100,
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) {
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this.id = id ? id : Item.nextId++;
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}
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clone(): Item {
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return Object.assign(new Item(), this);
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}
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}
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/*
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Copyright Google LLC. All Rights Reserved.
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Use of this source code is governed by an MIT-style license that
|
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can be found in the LICENSE file at https://angular.io/license
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*/"><input type="hidden" name="files[src/environments/environment.prod.ts]" value="export const environment = {
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production: true
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};
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/*
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Copyright Google LLC. All Rights Reserved.
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Use of this source code is governed by an MIT-style license that
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can be found in the LICENSE file at https://angular.io/license
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*/"><input type="hidden" name="files[src/environments/environment.ts]" value="// This file can be replaced during build by using the `fileReplacements` array.
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// `ng build --prod` replaces `environment.ts` with `environment.prod.ts`.
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// The list of file replacements can be found in `angular.json`.
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export const environment = {
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production: false
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};
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/*
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* For easier debugging in development mode, you can import the following file
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* to ignore zone related error stack frames such as `zone.run`, `zoneDelegate.invokeTask`.
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*
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* This import should be commented out in production mode because it will have a negative impact
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* on performance if an error is thrown.
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*/
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// import 'zone.js/plugins/zone-error'; // Included with Angular CLI.
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/*
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Copyright Google LLC. All Rights Reserved.
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Use of this source code is governed by an MIT-style license that
|
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can be found in the LICENSE file at https://angular.io/license
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*/"><input type="hidden" name="files[src/main.ts]" value="import { enableProdMode } from '@angular/core';
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import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
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import { AppModule } from './app/app.module';
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import { environment } from './environments/environment';
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if (environment.production) {
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enableProdMode();
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}
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platformBrowserDynamic().bootstrapModule(AppModule)
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.catch(err => console.log(err));
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/*
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Copyright Google LLC. All Rights Reserved.
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Use of this source code is governed by an MIT-style license that
|
||
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can be found in the LICENSE file at https://angular.io/license
|
||
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*/"><input type="hidden" name="files[src/polyfills.ts]" value="/**
|
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* This file includes polyfills needed by Angular and is loaded before the app.
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* You can add your own extra polyfills to this file.
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*
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* This file is divided into 2 sections:
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* 1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
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* 2. Application imports. Files imported after ZoneJS that should be loaded before your main
|
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* file.
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*
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* The current setup is for so-called "evergreen" browsers; the last versions of browsers that
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* automatically update themselves. This includes Safari >= 10, Chrome >= 55 (including Opera),
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* Edge >= 13 on the desktop, and iOS 10 and Chrome on mobile.
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*
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* Learn more in https://angular.io/guide/browser-support
|
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*/
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/***************************************************************************************************
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* BROWSER POLYFILLS
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*/
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/** IE11 requires the following for NgClass support on SVG elements */
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// import 'classlist.js'; // Run `npm install --save classlist.js`.
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||
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/**
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* Web Animations `@angular/platform-browser/animations`
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* Only required if AnimationBuilder is used within the application and using IE/Edge or Safari.
|
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* Standard animation support in Angular DOES NOT require any polyfills (as of Angular 6.0).
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*/
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// import 'web-animations-js'; // Run `npm install --save web-animations-js`.
|
||
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||
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/**
|
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* By default, zone.js will patch all possible macroTask and DomEvents
|
||
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* user can disable parts of macroTask/DomEvents patch by setting following flags
|
||
|
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* because those flags need to be set before `zone.js` being loaded, and webpack
|
||
|
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* will put import in the top of bundle, so user need to create a separate file
|
||
|
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* in this directory (for example: zone-flags.ts), and put the following flags
|
||
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* into that file, and then add the following code before importing zone.js.
|
||
|
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* import './zone-flags';
|
||
|
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*
|
||
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* The flags allowed in zone-flags.ts are listed here.
|
||
|
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*
|
||
|
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* The following flags will work for all browsers.
|
||
|
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*
|
||
|
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* (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch
|
||
|
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* requestAnimationFrame
|
||
|
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* (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
|
||
|
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* (window as any).__zone_symbol__UNPATCHED_EVENTS = ['scroll', 'mousemove']; // disable patch
|
||
|
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* specified eventNames
|
||
|
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*
|
||
|
|
* in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
|
||
|
|
* with the following flag, it will bypass `zone.js` patch for IE/Edge
|
||
|
|
*
|
||
|
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* (window as any).__Zone_enable_cross_context_check = true;
|
||
|
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*
|
||
|
|
*/
|
||
|
|
|
||
|
|
/***************************************************************************************************
|
||
|
|
* Zone JS is required by default for Angular itself.
|
||
|
|
*/
|
||
|
|
import 'zone.js'; // Included with Angular CLI.
|
||
|
|
|
||
|
|
/***************************************************************************************************
|
||
|
|
* APPLICATION IMPORTS
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
Copyright Google LLC. All Rights Reserved.
|
||
|
|
Use of this source code is governed by an MIT-style license that
|
||
|
|
can be found in the LICENSE file at https://angular.io/license
|
||
|
|
*/"><input type="hidden" name="files[src/app/app.component.css]" value="
|
||
|
|
button {
|
||
|
|
font-size: 100%;
|
||
|
|
margin: 0 2px;
|
||
|
|
}
|
||
|
|
|
||
|
|
div[ng-reflect-ng-switch], app-unknown-item {
|
||
|
|
margin: .5rem 0;
|
||
|
|
display: block;
|
||
|
|
}
|
||
|
|
|
||
|
|
#noTrackByCnt,
|
||
|
|
#withTrackByCnt {
|
||
|
|
color: darkred;
|
||
|
|
max-width: 450px;
|
||
|
|
margin: 4px;
|
||
|
|
}
|
||
|
|
|
||
|
|
img {
|
||
|
|
height: 100px;
|
||
|
|
}
|
||
|
|
|
||
|
|
.box {
|
||
|
|
border: 1px solid black;
|
||
|
|
padding: 6px;
|
||
|
|
max-width: 450px;
|
||
|
|
}
|
||
|
|
|
||
|
|
.child-div {
|
||
|
|
margin-left: 1em;
|
||
|
|
font-weight: normal;
|
||
|
|
}
|
||
|
|
|
||
|
|
.context {
|
||
|
|
margin-left: 1em;
|
||
|
|
}
|
||
|
|
|
||
|
|
.hidden {
|
||
|
|
display: none;
|
||
|
|
}
|
||
|
|
|
||
|
|
.parent-div {
|
||
|
|
margin-top: 1em;
|
||
|
|
font-weight: bold;
|
||
|
|
}
|
||
|
|
|
||
|
|
.course {
|
||
|
|
font-weight: bold;
|
||
|
|
font-size: x-large;
|
||
|
|
}
|
||
|
|
|
||
|
|
.helpful {
|
||
|
|
color: red;
|
||
|
|
}
|
||
|
|
|
||
|
|
.saveable {
|
||
|
|
color: limegreen;
|
||
|
|
}
|
||
|
|
|
||
|
|
.study,
|
||
|
|
.modified {
|
||
|
|
font-family: "Brush Script MT", cursive;
|
||
|
|
font-size: 2rem;
|
||
|
|
}
|
||
|
|
|
||
|
|
.toe {
|
||
|
|
margin-left: 1em;
|
||
|
|
font-style: italic;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
.to-toc {
|
||
|
|
margin-top: 10px;
|
||
|
|
display: block;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
Copyright Google LLC. All Rights Reserved.
|
||
|
|
Use of this source code is governed by an MIT-style license that
|
||
|
|
can be found in the LICENSE file at https://angular.io/license
|
||
|
|
*/"><input type="hidden" name="files[src/app/item-detail/item-detail.component.css]" value="
|
||
|
|
|
||
|
|
/*
|
||
|
|
Copyright Google LLC. All Rights Reserved.
|
||
|
|
Use of this source code is governed by an MIT-style license that
|
||
|
|
can be found in the LICENSE file at https://angular.io/license
|
||
|
|
*/"><input type="hidden" name="files[src/styles.css]" value="/* Global Styles */
|
||
|
|
* {
|
||
|
|
font-family: Arial, Helvetica, sans-serif;
|
||
|
|
}
|
||
|
|
h1 {
|
||
|
|
color: #264D73;
|
||
|
|
font-size: 2.5rem;
|
||
|
|
}
|
||
|
|
h2, h3 {
|
||
|
|
color: #444;
|
||
|
|
font-weight: lighter;
|
||
|
|
}
|
||
|
|
h3 {
|
||
|
|
font-size: 1.3rem;
|
||
|
|
}
|
||
|
|
body {
|
||
|
|
padding: .5rem;
|
||
|
|
max-width: 1000px;
|
||
|
|
margin: auto;
|
||
|
|
}
|
||
|
|
@media (min-width: 600px) {
|
||
|
|
body {
|
||
|
|
padding: 2rem;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
body, input[text] {
|
||
|
|
color: #333;
|
||
|
|
font-family: Cambria, Georgia, serif;
|
||
|
|
}
|
||
|
|
a {
|
||
|
|
cursor: pointer;
|
||
|
|
}
|
||
|
|
button {
|
||
|
|
background-color: #eee;
|
||
|
|
border: none;
|
||
|
|
border-radius: 4px;
|
||
|
|
cursor: pointer;
|
||
|
|
color: black;
|
||
|
|
font-size: 1.2rem;
|
||
|
|
padding: 1rem;
|
||
|
|
margin-right: 1rem;
|
||
|
|
margin-bottom: 1rem;
|
||
|
|
}
|
||
|
|
button:hover {
|
||
|
|
background-color: black;
|
||
|
|
color: white;
|
||
|
|
}
|
||
|
|
button:disabled {
|
||
|
|
background-color: #eee;
|
||
|
|
color: #aaa;
|
||
|
|
cursor: auto;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Navigation link styles */
|
||
|
|
nav a {
|
||
|
|
padding: 5px 10px;
|
||
|
|
text-decoration: none;
|
||
|
|
margin-right: 10px;
|
||
|
|
margin-top: 10px;
|
||
|
|
display: inline-block;
|
||
|
|
background-color: #e8e8e8;
|
||
|
|
color: #3d3d3d;
|
||
|
|
border-radius: 4px;
|
||
|
|
}
|
||
|
|
|
||
|
|
nav a:hover {
|
||
|
|
color: white;
|
||
|
|
background-color: #42545C;
|
||
|
|
}
|
||
|
|
nav a.active {
|
||
|
|
background-color: black;
|
||
|
|
color: white;
|
||
|
|
}
|
||
|
|
hr {
|
||
|
|
margin: 1.5rem 0;
|
||
|
|
}
|
||
|
|
input[type="text"] {
|
||
|
|
box-sizing: border-box;
|
||
|
|
width: 100%;
|
||
|
|
padding: .5rem;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
Copyright Google LLC. All Rights Reserved.
|
||
|
|
Use of this source code is governed by an MIT-style license that
|
||
|
|
can be found in the LICENSE file at https://angular.io/license
|
||
|
|
*/"><input type="hidden" name="files[src/app/app.component.html]" value="<h1>Built-in Directives</h1>
|
||
|
|
|
||
|
|
<h2>Built-in attribute directives</h2>
|
||
|
|
|
||
|
|
<h3 id="ngModel">NgModel (two-way) Binding</h3>
|
||
|
|
|
||
|
|
<fieldset><h4>NgModel examples</h4>
|
||
|
|
<p>Current item name: {{currentItem.name}}</p>
|
||
|
|
<p>
|
||
|
|
<label for="without">without NgModel:</label>
|
||
|
|
<input [value]="currentItem.name" (input)="currentItem.name=getValue($event.target)" id="without">
|
||
|
|
</p>
|
||
|
|
|
||
|
|
<p>
|
||
|
|
<label for="example-ngModel">[(ngModel)]:</label>
|
||
|
|
<input [(ngModel)]="currentItem.name" id="example-ngModel">
|
||
|
|
</p>
|
||
|
|
|
||
|
|
<p>
|
||
|
|
<label for="example-bindon">bindon-ngModel: </label>
|
||
|
|
<input bindon-ngModel="currentItem.name" id="example-bindon">
|
||
|
|
</p>
|
||
|
|
|
||
|
|
<p>
|
||
|
|
<label for="example-change">(ngModelChange)="...name=$event":</label>
|
||
|
|
<input [ngModel]="currentItem.name" (ngModelChange)="currentItem.name=$event" id="example-change">
|
||
|
|
</p>
|
||
|
|
|
||
|
|
<p>
|
||
|
|
<label for="example-uppercase">(ngModelChange)="setUppercaseName($event)"
|
||
|
|
<input [ngModel]="currentItem.name" (ngModelChange)="setUppercaseName($event)" id="example-uppercase">
|
||
|
|
</label>
|
||
|
|
</p>
|
||
|
|
</fieldset>
|
||
|
|
|
||
|
|
<hr><h2 id="ngClass">NgClass Binding</h2>
|
||
|
|
|
||
|
|
<p>currentClasses is {{currentClasses | json}}</p>
|
||
|
|
<div [ngClass]="currentClasses">This div is initially saveable, unchanged, and special.</div>
|
||
|
|
<ul>
|
||
|
|
<li>
|
||
|
|
<label for="saveable">saveable</label>
|
||
|
|
<input type="checkbox" [(ngModel)]="canSave" id="saveable">
|
||
|
|
</li>
|
||
|
|
<li>
|
||
|
|
<label for="modified">modified:</label>
|
||
|
|
<input type="checkbox" [value]="!isUnchanged" (change)="isUnchanged=!isUnchanged" id="modified"></li>
|
||
|
|
<li>
|
||
|
|
<label for="special">special: <input type="checkbox" [(ngModel)]="isSpecial" id="special"></label>
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
<button (click)="setCurrentClasses()">Refresh currentClasses</button>
|
||
|
|
|
||
|
|
<div [ngClass]="currentClasses">
|
||
|
|
This div should be {{ canSave ? "": "not"}} saveable,
|
||
|
|
{{ isUnchanged ? "unchanged" : "modified" }} and
|
||
|
|
{{ isSpecial ? "": "not"}} special after clicking "Refresh".</div>
|
||
|
|
<br><br>
|
||
|
|
<!-- toggle the "special" class on/off with a property -->
|
||
|
|
<div [ngClass]="isSpecial ? 'special' : ''">This div is special</div>
|
||
|
|
<div class="helpful study course">Helpful study course</div>
|
||
|
|
<div [ngClass]="{'helpful':false, 'study':true, 'course':true}">Study course</div>
|
||
|
|
|
||
|
|
|
||
|
|
<!-- NgStyle binding -->
|
||
|
|
<hr><h3>NgStyle Binding</h3>
|
||
|
|
<div [style.font-size]="isSpecial ? 'x-large' : 'smaller'">
|
||
|
|
This div is x-large or smaller.
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h4>[ngStyle] binding to currentStyles - CSS property names</h4>
|
||
|
|
<p>currentStyles is {{currentStyles | json}}</p>
|
||
|
|
|
||
|
|
<div [ngStyle]="currentStyles">
|
||
|
|
This div is initially italic, normal weight, and extra large (24px).
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<label>italic: <input type="checkbox" [(ngModel)]="canSave"></label> |
|
||
|
|
<label>normal: <input type="checkbox" [(ngModel)]="isUnchanged"></label> |
|
||
|
|
<label>xlarge: <input type="checkbox" [(ngModel)]="isSpecial"></label>
|
||
|
|
<button (click)="setCurrentStyles()">Refresh currentStyles</button>
|
||
|
|
<br><br>
|
||
|
|
<div [ngStyle]="currentStyles">
|
||
|
|
This div should be {{ canSave ? "italic": "plain"}},
|
||
|
|
{{ isUnchanged ? "normal weight" : "bold" }} and,
|
||
|
|
{{ isSpecial ? "extra large": "normal size"}} after clicking "Refresh".</div>
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
<h2>Built-in structural directives</h2>
|
||
|
|
<h3 id="ngIf">NgIf Binding</h3>
|
||
|
|
<div>
|
||
|
|
<p>If isActive is true, app-item-detail will render: </p>
|
||
|
|
<app-item-detail *ngIf="isActive" [item]="item"></app-item-detail>
|
||
|
|
|
||
|
|
<button (click)="isActiveToggle()">Toggle app-item-detail</button>
|
||
|
|
</div>
|
||
|
|
<p>If currentCustomer isn't null, say hello to Laura:</p>
|
||
|
|
<div *ngIf="currentCustomer">Hello, {{currentCustomer.name}}</div>
|
||
|
|
<p>nullCustomer is null by default. NgIf guards against null. Give it a value to show it:</p>
|
||
|
|
<div *ngIf="nullCustomer">Hello, <span>{{nullCustomer}}</span></div>
|
||
|
|
<button (click)="giveNullCustomerValue()">Give nullCustomer a value</button>
|
||
|
|
|
||
|
|
|
||
|
|
<h4>NgIf binding with template (no *)</h4>
|
||
|
|
|
||
|
|
<ng-template [ngIf]="currentItem">Add {{currentItem.name}} with template</ng-template>
|
||
|
|
<hr>
|
||
|
|
|
||
|
|
<h4>Show/hide vs. NgIf</h4>
|
||
|
|
<!-- isSpecial is true -->
|
||
|
|
<div [class.hidden]="!isSpecial">Show with class</div>
|
||
|
|
<div [class.hidden]="isSpecial">Hide with class</div>
|
||
|
|
|
||
|
|
<p>ItemDetail is in the DOM but hidden</p>
|
||
|
|
<app-item-detail [class.hidden]="isSpecial"></app-item-detail>
|
||
|
|
|
||
|
|
<div [style.display]="isSpecial ? 'block' : 'none'">Show with style</div>
|
||
|
|
<div [style.display]="isSpecial ? 'none' : 'block'">Hide with style</div>
|
||
|
|
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
<h2 id="ngFor">NgFor Binding</h2>
|
||
|
|
|
||
|
|
<div class="box">
|
||
|
|
<div *ngFor="let item of items">{{item.name}}</div>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<p>*ngFor with ItemDetailComponent element</p>
|
||
|
|
<div class="box">
|
||
|
|
<app-item-detail *ngFor="let item of items" [item]="item"></app-item-detail>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
<h4 id="ngFor-index">*ngFor with index</h4>
|
||
|
|
<p>with <i>semi-colon</i> separator</p>
|
||
|
|
<div class="box">
|
||
|
|
<div *ngFor="let item of items; let i=index">{{i + 1}} - {{item.name}}</div>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<p>with <i>comma</i> separator</p>
|
||
|
|
<div class="box">
|
||
|
|
<div *ngFor="let item of items, let i=index">{{i + 1}} - {{item.name}}</div>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h4 id="ngFor-trackBy">*ngFor trackBy</h4>
|
||
|
|
<button (click)="resetList()">Reset items</button>
|
||
|
|
<button (click)="changeIds()">Change ids</button>
|
||
|
|
<button (click)="clearTrackByCounts()">Clear counts</button>
|
||
|
|
|
||
|
|
<p><i>without</i> trackBy</p>
|
||
|
|
<div class="box">
|
||
|
|
<div #noTrackBy *ngFor="let item of items">({{item.id}}) {{item.name}}</div>
|
||
|
|
|
||
|
|
<div id="noTrackByCnt" *ngIf="itemsNoTrackByCount" >
|
||
|
|
Item DOM elements change #{{itemsNoTrackByCount}} without trackBy
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<p>with trackBy</p>
|
||
|
|
<div class="box">
|
||
|
|
<div #withTrackBy *ngFor="let item of items; trackBy: trackByItems">({{item.id}}) {{item.name}}</div>
|
||
|
|
|
||
|
|
<div id="withTrackByCnt" *ngIf="itemsWithTrackByCount">
|
||
|
|
Item DOM elements change #{{itemsWithTrackByCount}} with trackBy
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<br><br><br>
|
||
|
|
|
||
|
|
<p>with trackBy and <i>semi-colon</i> separator</p>
|
||
|
|
<div class="box">
|
||
|
|
<div *ngFor="let item of items; trackBy: trackByItems">
|
||
|
|
({{item.id}}) {{item.name}}
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<p>with trackBy and <i>comma</i> separator</p>
|
||
|
|
<div class="box">
|
||
|
|
<div *ngFor="let item of items, trackBy: trackByItems">({{item.id}}) {{item.name}}</div>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<p>with trackBy and <i>space</i> separator</p>
|
||
|
|
<div class="box">
|
||
|
|
<div *ngFor="let item of items trackBy: trackByItems">({{item.id}}) {{item.name}}</div>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<p>with <i>generic</i> trackById function</p>
|
||
|
|
<div class="box">
|
||
|
|
<div *ngFor="let item of items, trackBy: trackById">({{item.id}}) {{item.name}}</div>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<hr><h2>NgSwitch Binding</h2>
|
||
|
|
|
||
|
|
<p>Pick your favorite item</p>
|
||
|
|
<div>
|
||
|
|
<label *ngFor="let i of items">
|
||
|
|
<div><input type="radio" name="items" [(ngModel)]="currentItem" [value]="i">{{i.name}}
|
||
|
|
</div>
|
||
|
|
</label>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<div [ngSwitch]="currentItem.feature">
|
||
|
|
<app-stout-item *ngSwitchCase="'stout'" [item]="currentItem"></app-stout-item>
|
||
|
|
<app-device-item *ngSwitchCase="'slim'" [item]="currentItem"></app-device-item>
|
||
|
|
<app-lost-item *ngSwitchCase="'vintage'" [item]="currentItem"></app-lost-item>
|
||
|
|
<app-best-item *ngSwitchCase="'bright'" [item]="currentItem"></app-best-item>
|
||
|
|
<div *ngSwitchCase="'bright'"> Are you as bright as {{currentItem.name}}?</div>
|
||
|
|
<app-unknown-item *ngSwitchDefault [item]="currentItem"></app-unknown-item>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<!--
|
||
|
|
Copyright Google LLC. All Rights Reserved.
|
||
|
|
Use of this source code is governed by an MIT-style license that
|
||
|
|
can be found in the LICENSE file at https://angular.io/license
|
||
|
|
-->"><input type="hidden" name="files[src/app/item-detail/item-detail.component.html]" value="<div>
|
||
|
|
<span>{{item?.name}}</span>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
<!--
|
||
|
|
Copyright Google LLC. All Rights Reserved.
|
||
|
|
Use of this source code is governed by an MIT-style license that
|
||
|
|
can be found in the LICENSE file at https://angular.io/license
|
||
|
|
-->"><input type="hidden" name="files[src/index.html]" value="<!doctype html>
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<meta charset="utf-8">
|
||
|
|
<title>BuiltInDirectives</title>
|
||
|
|
<base href="/">
|
||
|
|
<meta name="viewport" content="width=device-width, initial-scale=1">
|
||
|
|
<link rel="icon" type="image/x-icon" href="favicon.ico">
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<app-root></app-root>
|
||
|
|
</body>
|
||
|
|
</html>
|
||
|
|
|
||
|
|
|
||
|
|
<!--
|
||
|
|
Copyright Google LLC. All Rights Reserved.
|
||
|
|
Use of this source code is governed by an MIT-style license that
|
||
|
|
can be found in the LICENSE file at https://angular.io/license
|
||
|
|
-->"><input type="hidden" name="files[angular.json]" value="{
|
||
|
|
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
|
||
|
|
"version": 1,
|
||
|
|
"newProjectRoot": "projects",
|
||
|
|
"projects": {
|
||
|
|
"angular.io-example": {
|
||
|
|
"projectType": "application",
|
||
|
|
"schematics": {
|
||
|
|
"@schematics/angular:application": {
|
||
|
|
"strict": true
|
||
|
|
}
|
||
|
|
},
|
||
|
|
"root": "",
|
||
|
|
"sourceRoot": "src",
|
||
|
|
"prefix": "app",
|
||
|
|
"architect": {
|
||
|
|
"build": {
|
||
|
|
"builder": "@angular-devkit/build-angular:browser",
|
||
|
|
"options": {
|
||
|
|
"outputPath": "dist",
|
||
|
|
"index": "src/index.html",
|
||
|
|
"main": "src/main.ts",
|
||
|
|
"polyfills": "src/polyfills.ts",
|
||
|
|
"tsConfig": "tsconfig.app.json",
|
||
|
|
"aot": true,
|
||
|
|
"assets": [
|
||
|
|
"src/favicon.ico",
|
||
|
|
"src/assets"
|
||
|
|
],
|
||
|
|
"styles": [
|
||
|
|
"src/styles.css"
|
||
|
|
],
|
||
|
|
"scripts": []
|
||
|
|
},
|
||
|
|
"configurations": {
|
||
|
|
"production": {
|
||
|
|
"fileReplacements": [
|
||
|
|
{
|
||
|
|
"replace": "src/environments/environment.ts",
|
||
|
|
"with": "src/environments/environment.prod.ts"
|
||
|
|
}
|
||
|
|
],
|
||
|
|
"optimization": true,
|
||
|
|
"outputHashing": "all",
|
||
|
|
"sourceMap": false,
|
||
|
|
"namedChunks": false,
|
||
|
|
"extractLicenses": true,
|
||
|
|
"vendorChunk": false,
|
||
|
|
"buildOptimizer": true,
|
||
|
|
"budgets": [
|
||
|
|
{
|
||
|
|
"type": "initial",
|
||
|
|
"maximumWarning": "500kb",
|
||
|
|
"maximumError": "1mb"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"type": "anyComponentStyle",
|
||
|
|
"maximumWarning": "2kb",
|
||
|
|
"maximumError": "4kb"
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
"serve": {
|
||
|
|
"builder": "@angular-devkit/build-angular:dev-server",
|
||
|
|
"options": {
|
||
|
|
"browserTarget": "angular.io-example:build"
|
||
|
|
},
|
||
|
|
"configurations": {
|
||
|
|
"production": {
|
||
|
|
"browserTarget": "angular.io-example:build:production"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
"extract-i18n": {
|
||
|
|
"builder": "@angular-devkit/build-angular:extract-i18n",
|
||
|
|
"options": {
|
||
|
|
"browserTarget": "angular.io-example:build"
|
||
|
|
}
|
||
|
|
},
|
||
|
|
"test": {
|
||
|
|
"builder": "@angular-devkit/build-angular:karma",
|
||
|
|
"options": {
|
||
|
|
"main": "src/test.ts",
|
||
|
|
"polyfills": "src/polyfills.ts",
|
||
|
|
"tsConfig": "tsconfig.spec.json",
|
||
|
|
"karmaConfig": "karma.conf.js",
|
||
|
|
"assets": [
|
||
|
|
"src/favicon.ico",
|
||
|
|
"src/assets"
|
||
|
|
],
|
||
|
|
"styles": [
|
||
|
|
"src/styles.css"
|
||
|
|
],
|
||
|
|
"scripts": []
|
||
|
|
}
|
||
|
|
},
|
||
|
|
"lint": {
|
||
|
|
"builder": "@angular-devkit/build-angular:tslint",
|
||
|
|
"options": {
|
||
|
|
"tsConfig": [
|
||
|
|
"tsconfig.app.json",
|
||
|
|
"tsconfig.spec.json",
|
||
|
|
"e2e/tsconfig.json"
|
||
|
|
],
|
||
|
|
"exclude": [
|
||
|
|
"**/node_modules/**"
|
||
|
|
]
|
||
|
|
}
|
||
|
|
},
|
||
|
|
"e2e": {
|
||
|
|
"builder": "@angular-devkit/build-angular:protractor",
|
||
|
|
"options": {
|
||
|
|
"protractorConfig": "e2e/protractor.conf.js",
|
||
|
|
"devServerTarget": "angular.io-example:serve"
|
||
|
|
},
|
||
|
|
"configurations": {
|
||
|
|
"production": {
|
||
|
|
"devServerTarget": "angular.io-example:serve:production"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
"defaultProject": "angular.io-example"
|
||
|
|
}
|
||
|
|
"><input type="hidden" name="files[tsconfig.json]" value="{
|
||
|
|
"compileOnSave": false,
|
||
|
|
"compilerOptions": {
|
||
|
|
"baseUrl": "./",
|
||
|
|
"outDir": "./dist/out-tsc",
|
||
|
|
"forceConsistentCasingInFileNames": true,
|
||
|
|
"noImplicitReturns": true,
|
||
|
|
"noFallthroughCasesInSwitch": true,
|
||
|
|
"sourceMap": true,
|
||
|
|
"declaration": false,
|
||
|
|
"downlevelIteration": true,
|
||
|
|
"experimentalDecorators": true,
|
||
|
|
"moduleResolution": "node",
|
||
|
|
"importHelpers": true,
|
||
|
|
"target": "es2015",
|
||
|
|
"module": "es2020",
|
||
|
|
"lib": [
|
||
|
|
"es2018",
|
||
|
|
"dom"
|
||
|
|
]
|
||
|
|
},
|
||
|
|
"angularCompilerOptions": {
|
||
|
|
"strictInjectionParameters": true,
|
||
|
|
"strictInputAccessModifiers": true,
|
||
|
|
"strictTemplates": true,
|
||
|
|
"enableIvy": true
|
||
|
|
}
|
||
|
|
}"><input type="hidden" name="tags[0]" value="angular"><input type="hidden" name="tags[1]" value="example"><input type="hidden" name="tags[2]" value="Built-in Directives"><input type="hidden" name="description" value="Angular Example - Built-in Directives"><input type="hidden" name="dependencies" value="{"@angular/animations":"~11.0.1","@angular/common":"~11.0.1","@angular/compiler":"~11.0.1","@angular/core":"~11.0.1","@angular/forms":"~11.0.1","@angular/platform-browser":"~11.0.1","@angular/platform-browser-dynamic":"~11.0.1","@angular/router":"~11.0.1","angular-in-memory-web-api":"~0.11.0","rxjs":"~6.6.0","tslib":"^2.0.0","zone.js":"~0.11.4","jasmine-core":"~3.6.0","jasmine-marbles":"~0.6.0"}"></form>
|
||
|
|
<script>
|
||
|
|
var embedded = 'ctl=1';
|
||
|
|
var isEmbedded = window.location.search.indexOf(embedded) > -1;
|
||
|
|
|
||
|
|
if (isEmbedded) {
|
||
|
|
var form = document.getElementById('mainForm');
|
||
|
|
var action = form.action;
|
||
|
|
var actionHasParams = action.indexOf('?') > -1;
|
||
|
|
var symbol = actionHasParams ? '&' : '?'
|
||
|
|
form.action = form.action + symbol + embedded;
|
||
|
|
}
|
||
|
|
document.getElementById("mainForm").submit();
|
||
|
|
</script>
|
||
|
|
</body></html>
|