JAVASCRIPT

change object in array in state

const toggleDone = (id) => {
  console.log(id);

  // loop over the todos list and find the provided id.
  let updatedList = state.todos.map(item => 
    {
      if (item.id == id){
        return {...item, done: !item.done}; //gets everything that was already in item, and updates "done"
      }
      return item; // else return unmodified item 
    });

  setState({todos: updatedList}); // set state to new object with updated list
}

update object in array state react

const handleAdd = (todo) => {
  const newTodos = [...todos];
  newTodos.push(todo);
  setTodos(newTodos);
}

change value in array react

setOfficeSpace([...officeSpace, { ...item, number: 1, type: item.key }]);