Using ref in a repetitive environment - aurelia

Question

I'm using a custom element to print the length of an input element. I got it working in a regular environment, but I have trouble creating unique refs in a repeat.for environment
I've tried using combinations of ref=name$index or ref=name${$index}, but none of them work so far.
In a non-repetitive environment, this works
<div class="row">
<label>
Name
<my-custom-element field.bind="name"></my-custom-element>
<input
type="text"
name="name"
ref="name"
value.bind="name"
maxlength="150" />
</label>
</div>
However, once I use repeat for, it stops working, cause I am using field.bind and ref wrongly. E.g.
<div repeat.for="item of items" class="row">
<label>
Name
<my-custom-element field.bind="name${$index}"></my-custom-element>
<input
type="text"
name="name${$index}"
ref="name${$index}"
value.bind="item.name"
maxlength="150" />
</label>
</div>
I'm just trying to make the ref look something like name0, name1, name2 etc, so that it is unique.
The error looks like Parser Error: Unconsumed token { at column 5 in expression [name${$index}]

Answer 1

You are iterating through items, which presumably is an array of objects having a name property. I think you want something more like the following:
<div repeat.for="item of items" class="row">
<label>
Name
<my-custom-element field.bind="item.name"></my-custom-element>
<input
type="text"
name="item.name"
ref="item.name"
value.bind="item.name"
maxlength="150" />
</label>