Vue js object element access?

Question

Vue.js

There is an array in data, in the screenshot its output in the console.
It is not possible to enumerate
{%%} - this is the output template instead of the standard {{ }}
In the console, access is console.log(this.boxes[0].height);
{% box.height %} syntax problem

<ul>
      <li v-for="box in boxes">
        {% box.height %}
      </li>
    </ul>

Answer 1

Everything works, the problem is somewhere else: