feat: demo version additions

docs/app/blocks/components/example-block/example-block.component.ts

@@ -0,0 +1,43 @@
+import {
+  ChangeDetectionStrategy,
+  ChangeDetectorRef,
+  Component,
+  Input,
+} from '@angular/core';
+import { NgxCodeLoaderService } from '../../../@theme/services/code-loader.service';
+
+@Component({
+  selector: 'ngx-example-block',
+  template: `
+    <ngx-code-block *ngIf="code"
+      [firstLine]="firstLine"
+      [lastLine]="lastLine"
+      [code]="code">
+    </ngx-code-block>
+  `,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class NgxExampleBlockComponent {
+
+  code: string;
+  firstLine: number;
+  lastLine: number;
+
+  @Input('content')
+  set setContent(content) {
+    this.loadCode(content);
+  }
+
+  constructor(private codeLoader: NgxCodeLoaderService, private cd: ChangeDetectorRef) {
+  }
+
+  loadCode(content) {
+    this.codeLoader.load(content.files[0])
+      .subscribe((code: string) => {
+        this.code = code;
+        this.firstLine = content.firstLine || 1;
+        this.lastLine = content.lastLine || code.split('\n').length;
+        this.cd.detectChanges();
+      });
+  }
+}