First try appcommon as library

projects/common/src/lib/components/side-panel/side-panel.component.ts

@@ -0,0 +1,24 @@
+import { Component, Input } from '@angular/core';
+
+@Component({
+  selector: 'side-panel',
+  templateUrl: 'side-panel.component.html',
+  styleUrls: ['side-panel.component.scss']
+})
+
+
+export class SidePanelComponent  {
+  @Input() public visible: boolean;
+  @Input() public collapsed: boolean;
+  @Input() public collapsable: boolean;
+
+  constructor() {
+    this.collapsable = false;
+  }
+
+  handleToggleClick(event) {
+    if (this.collapsable) {
+      this.collapsed = !this.collapsed;
+    }
+  }
+}