I wonder how I can select a specific element in the DOM using VueJS with our without jquery

In my component I have a method function that does this:

```
$(".u-loc input").focusin(function() {
    $(".u-loc-icon").addClass('blue-active');
});

```

The only problem is that its generated dynamic, so I could have 1 or 10 different which means I need to have a uniqe selector to each one.

So I have added `:ref="'u-loc' + index"`

Which means that I can now target the element using `$(this.$refs['u-loc' + index]);`

But I dont know how I can chain the selector to look something like this:

```
$(this.$refs['u-loc' + index]).('input').focusin(function() {
  $(this.$refs['u-loc' + index]).addClass('blue-active');
});

```

The problem is that I need to select the elements `[input]`