Im trying to validate a birthdate with moment js, but i cant do it.
Im using this code:

```
dateIsBefore(date) {
      return moment(date, 'DD/MM/YYYY').isBefore(moment().format('DD/MM/YYYY'));
    }

```

and this is my masked input element:

```
<el-input
                  class="date-input"
                  type="tel"
                  v-mask="'##/##/####'"
                  placeholder="dd/mm/aaaa"
                ></el-input>

```

but it return me a false value, when i expecting a true. The moment object say the date is invalid.

Im getting the date from an input text (is a masked input date) with the format '28/04/1990'.