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5 changes: 5 additions & 0 deletions packages/docs/src/en/start-here.md
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Expand Up @@ -282,6 +282,11 @@ return this.items.filter(

This is all plain JavaScript. We are first getting the array of items (foo, bar, and baz) and filtering them using the provided callback: `i => i.startsWith(this.search)`.

To escape lower and upper letter cases use .toLowerCase() along with this.search to be like

```this.search.toLowerCase()
```

By passing in this callback to `filter`, we are telling JavaScript to only return the items that start with the string: `this.search`, which like we saw with `x-model` will always reflect the value of the input.

You may notice that up until now, we haven't had to use `this.` to reference properties. However, because we are working directly inside the `x-data` object, we must reference any properties using `this.[property]` instead of simply `[property]`.
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