find and update the value inside the object js

1Step1: Inside state
2state = {
3  todos: [
4   {
5     id: 1, 
6    title: "Eat breakfast",
7    completed: false
8   },
9   {
10     id: 2,
11    title: "Make bed",
12    completed: false
13   }
14  ]
15}
16
17Steps: Inside function where you need to update the value
18const elementsIndex = this.state.todos.findIndex(element => element.id == id );
19
20let newArray = [...this.state.todos]
21
22newArray[elementsIndex] = {...newArray[elementsIndex], completed: !newArray[elementsIndex].completed}
23
24this.setState({ todos: newArray });