How to add object to array?

Good afternoon. Study Vue.js. At this stage in the work process must be created on the website form. As a test created a list of items and input by clicking on the button is added to the array a new element. did as instructed here: https://metanit.com/web/vuejs/2.4.php
I need to the quality of the item was the object.. I tried in different ways, but never could bring..
here is an example that I wrote is correct, please.

https://jsfiddle.net/zjbyp39a/
June 14th 19 at 18:07
2 answers
June 14th 19 at 18:09
Solution
Yes, thank you :) - Sadie_Padbe commented on June 14th 19 at 18:12
June 14th 19 at 18:11
Vue have a great documentation in Russian

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