Using Dynamic Value to add Object to Array with the Spread Operator

I have some code within a function that looks like this:

 const updatedItemsArr = [...this.state.targetItems, {relationship: value}];

What I want to do is pass in a dynamic value in place of relationship. However, whatever I try ends up causing an error or is incorrect syntax.

This will not work:

const fieldType = 'relationship';
const updatedItemsArr = [...this.state.targetItems, {fieldType: value}];

Nor will this:

  const updatedItemsArr = [...this.state.targetItems, {`${fieldType}`: value}];

How can I pass in a dynamic value here?

>Solution :

In ES6 what you can do is you can put the dynamic key inside brackets. So

const updatedItemsArr = [...this.state.targetItems, {[fieldType]: value}];

should work.