How do I use an empty string with a USelect value?

[jwoertink]

Description

My app uses a LOT of filters, and with UI v2, I had these:

<USelect :items="items" placeholder="Filter by tags" v-model="tagFilter" />

// filter by tags
const items = [
  {
    label: "Show all tags",
    value: ""
   },
   {
     label: "Only Red Tags",
      value: "red"
   },
   {
     label: "Only Green Tags",
     value: "green"
  }
]

const tagFilter = ref(null)

but in v3 I now get this error:

Error: A must have a value prop that is not an empty string. This is because the Select value can be set to an empty string to clear the selection and show the placeholder.

How would I add this option in?

[jwoertink]

Ok, just realized I can use value: null and this works fine.