How to count objects in a VUE array?

Question

Vue.js

You need to count the number of errors in the errors array, and if there are none, then (long story) ..
I'm trying to count in computed using an example from the Internet

errors_count: function () {
              return this.errors.length
        }

Received validation errors (i.e. the errors array was filled with objects), and
errors_count: undefined

Answer 1

The object does not have a length property, so you need to cast it to an array (of values ​​or keys)

errors_count: function () {
    return Object.keys(this.errors).length;
}