docs: refactored ng-container code (#22742)

PR Close #22742

aio/content/examples/ngcontainer/src/app/app.component.css

@@ -4,7 +4,8 @@ button {
   font-size: 100%;
 }
 
-code, .code {
+code,
+.code {
   background-color: #eee;
   color: black;
   font-family: Courier, sans-serif;
@@ -21,14 +22,18 @@ div.code {
 }
 
 hr {
-  margin: 40px 0
+  margin: 40px 0;
 }
 
-td, th {
+td,
+th {
   text-align: left;
   vertical-align: top;
 }
 
 /* #docregion p-span */
-p span { color: red; font-size: 70%; }
+p span {
+  color: red;
+  font-size: 70%;
+}
 /* #enddocregion p-span */

aio/content/examples/ngcontainer/src/app/app.component.html

@@ -132,7 +132,7 @@
 <!-- #docregion select-span -->
 <select [(ngModel)]="hero">
   <span *ngFor="let h of heroes">
-    <span *ngIf="showSad || h?.emotion != 'sad'">
+    <span *ngIf="showSad || h?.emotion !== 'sad'">
       <option [ngValue]="h">{{h.name}} ({{h?.emotion}})</option>
     </span>
   </span>
@@ -147,7 +147,7 @@
 <!-- #docregion select-ngcontainer -->
 <select [(ngModel)]="hero">
   <ng-container *ngFor="let h of heroes">
-    <ng-container *ngIf="showSad || h?.emotion != 'sad'">
+    <ng-container *ngIf="showSad || h?.emotion !== 'sad'">
       <option [ngValue]="h">{{h.name}} ({{h?.emotion}})</option>
     </ng-container>
   </ng-container>

aio/content/examples/ngcontainer/src/app/app.component.ts

@@ -6,14 +6,15 @@ import { heroes } from './hero';
 @Component({
   selector: 'my-app',
   templateUrl: './app.component.html',
-  styleUrls: [ './app.component.css' ]
+  styleUrls: ['./app.component.css']
 })
 export class AppComponent {
   heroes = heroes;
   hero = this.heroes[0];
-  heroTraits = [ 'honest', 'brave', 'considerate' ];
+  heroTraits = ['honest', 'brave', 'considerate'];
 
   // flags for the table
+
   attrDirs = true;
   strucDirs = true;
   divNgIf = false;

aio/content/examples/ngcontainer/src/app/hero.components.ts

@@ -1,5 +1,6 @@
 // #docregion
 import { Component, Input } from '@angular/core';
+
 import { Hero } from './hero';
 
 @Component({
@@ -33,11 +34,15 @@ export class ConfusedHeroComponent {
 export class UnknownHeroComponent {
   @Input() hero: Hero;
   get message() {
-    return this.hero && this.hero.name ?
-      `${this.hero.name} is strange and mysterious.` :
-      'Are you feeling indecisive?';
+    return this.hero && this.hero.name
+      ? `${this.hero.name} is strange and mysterious.`
+      : 'Are you feeling indecisive?';
   }
 }
 
-export const heroComponents =
-  [ HappyHeroComponent, SadHeroComponent, ConfusedHeroComponent, UnknownHeroComponent ];
+export const heroComponents = [
+  HappyHeroComponent,
+  SadHeroComponent,
+  ConfusedHeroComponent,
+  UnknownHeroComponent
+];

aio/content/examples/ngcontainer/src/app/hero.ts

@@ -6,8 +6,8 @@ export class Hero {
 }
 
 export const heroes: Hero[] = [
-  { id: 1, name: 'Mr. Nice',  emotion: 'happy'},
+  { id: 1, name: 'Mr. Nice', emotion: 'happy' },
   { id: 2, name: 'Narco', emotion: 'sad' },
   { id: 3, name: 'Windstorm', emotion: 'confused' },
-  { id: 4, name: 'Magneta'}
+  { id: 4, name: 'Magneta' }
 ];