React set state for object property (one-liner)

react-state-object-property.js

// to update a property in an object, for example a title

setMyState({
  ...currentState,
  title: newTitle,
});

/* Explanation below...

// we have an object set as state
const post = { id: 2, title: 'My Post', content: 'This is my post.' };
setPost(post);

// we want to update only one property, the title, but we can't edit state directly, so we create a new object then save it to state
let newPost = { ...post };
newPost.title = "Update my title";
setPost(newPost);

// instead, you can do
let newTitle = "Update my title";
setPost({
  ...post,
  title: newTitle,
});

*/