# AUR0161

## Error Message

`AUR0161: Expression error: unexpected keyword "of": "{{expression}}"`

## Description

This error occurs when the keyword `of` appears where the expression parser does not expect it. `of` is used in Aurelia template syntax such as `repeat.for="item of items"`, but it is not a general-purpose operator inside all expressions.

## Example Trigger

```html
<!-- ❌ "of" used outside repeat.for -->
<div textcontent.bind="item of items"></div>
```

## Solution

* Use `repeat.for` for iteration.

```html
<!-- ✅ -->
<div repeat.for="item of items">${item}</div>
```

## Troubleshooting

* Check for accidental copy/paste of `repeat.for` syntax into a normal binding.