block20.js

// App.js

// ...

import { createNote, deleteNote } from "./graphql/mutations"

// inside App component, add this

deleteNote = async noteID => {
	const { notes } = this.state
	const input = { id: noteID }
	const result = await API.graphql(graphqlOperation(deleteNote, { input }))

	const deleteNoteId = result.data.deleteNote.id

	const updatedNotesList = notes.filter(note => note.id !== deleteNoteId)

	this.setState({ notes: updatedNotesList })
}