feat: on push strategy for context menu

Author: eduardmarcinco

src/context-menu/context-menu-divider.component.ts

@@ -1,8 +1,9 @@
-import { Component, HostBinding } from "@angular/core";
+import { ChangeDetectionStrategy, Component, HostBinding } from "@angular/core";
 
 @Component({
 	selector: "cds-context-menu-divider, ibm-context-menu-divider",
-	template: ""
+	template: "",
+	changeDetection: ChangeDetectionStrategy.OnPush
 })
 export class ContextMenuDividerComponent {
 	@HostBinding("class.cds--menu-item-divider") dividerClass = true;

src/context-menu/context-menu-group.component.ts

@@ -1,4 +1,5 @@
 import {
+	ChangeDetectionStrategy,
 	Component,
 	EventEmitter,
 	HostBinding,
@@ -17,7 +18,8 @@ import { ContextMenuSelectionService } from "./context-menu-selection.service";
 	template: `
 		<ng-content />
 	`,
-	providers: [ContextMenuSelectionService]
+	providers: [ContextMenuSelectionService],
+	changeDetection: ChangeDetectionStrategy.OnPush
 })
 export class ContextMenuGroupComponent implements OnInit, OnChanges, OnDestroy {
 	@HostBinding("attr.role") role = "group";

src/context-menu/context-menu-item.component.ts

@@ -10,7 +10,8 @@ import {
 	Optional,
 	OnInit,
 	AfterContentInit,
-	OnDestroy
+	OnDestroy,
+	ChangeDetectionStrategy
 } from "@angular/core";
 import { Subscription } from "rxjs";
 import { ContextMenuSelectionService } from "./context-menu-selection.service";
@@ -41,7 +42,8 @@ import { ContextMenuComponent } from "./context-menu.component";
 		:host {
 			grid-template-columns: 1rem 1fr max-content;
 		}
-	`]
+	`],
+	changeDetection: ChangeDetectionStrategy.OnPush
 })
 export class ContextMenuItemComponent implements OnInit, AfterContentInit, OnDestroy {
 	@HostBinding("class.cds--menu-item") optionClass = true;

src/context-menu/context-menu.component.ts

@@ -5,7 +5,8 @@ import {
 	Input,
 	SimpleChanges,
 	OnChanges,
-	HostBinding
+	HostBinding,
+	ChangeDetectionStrategy
 } from "@angular/core";
 
 /**
@@ -26,7 +27,8 @@ import {
 		:host {
 			display: block;
 		}
-	`]
+	`],
+	changeDetection: ChangeDetectionStrategy.OnPush
 })
 export class ContextMenuComponent implements OnChanges {
 	@Input() open = false;