parse laravel dot notation errors response

gistfile1.js

computed: {
parsedErrors() {
        const parseDotNotation = function(str, val, obj) {
          let currentObj = obj,
            keys = str.split('.'),
            i, l = Math.max(1, keys.length - 1),
            key

          for (i = 0; i < l; ++i) {
            key = keys[i]
            currentObj[key] = currentObj[key] || {}
            currentObj = currentObj[key]
          }

          currentObj[keys[i]] = val
          delete obj[str]
        }

        const expand  = function (obj) {
          for (let key in obj) {
            if (obj.hasOwnProperty(key) && key.indexOf('.') !== -1) {
              parseDotNotation(key, obj[key], obj)
            }
          }
          return obj
        }

        return expand(this.errors)
      }
}