#18: 🗑 Remove item
The user should be able to remove any item, whether it's still active or completed. Removing an item will be done by clicking a button, aptly named "remove". In this chapter, we'll learn how to add this functionality to our project.
First, we need to add the button to the item, so we'll work on the file
todo-item.component.ts.Add a "remove" button to the item template, with a
click event handler that calls a removeItem method (which we'll create in a moment):src/app/todo-item/todo-item.component.ts
template: `
<div class="todo-item">
{{ item.title }}
<button class="btn btn-red" (click)="removeItem()">
remove
</button>
</div>
`,
Add a new output to the
TodoItemComponent class, which will emit the removed item to the list manager when a user presses its remove button:src/app/todo-item/todo-item.component.ts
@Output() remove: EventEmitter<TodoItem> = new EventEmitter<TodoItem>();
Make sure to import both
EventEmitter and Output:src/app/todo-item/todo-item.component.ts
import { Component, OnInit, Input, EventEmitter, Output } from '@angular/core';
Add a method to the
ItemComponent class to actually emit the event. This method will be called when the user clicks the "remove" button:removeItem(): void {
this.remove.emit(this.item);
}
Now that each todo item can emit its own removal, let's make sure that the list manager actually removes that same item from the list. For that, we'll work on the file
list-manager.component.ts.We need to respond to the
remove event. Let's add it to the template, inside the <todo-item> tag:src/app/list-manager/list-manager.component.ts
<app-todo-item [item]="todoItem"
(remove)="removeItem($event)"></app-todo-item>
Now we just need to add the method
removeItem() to the ListManagerComponent class, and use the todoListService 's method deleteItem which will remove the item from the list and update the local storage:src/app/list-manager/list-manager.component.ts
removeItem(item): void {
this.todoListService.deleteItem(item);
}
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