script/no-deprecated-props-default-this

Disallow this inside a prop default/validator function (removed in Vue 3)

Bad · Good

Default severity: error
Presets: none
Automatic fix: None; review the suggested change
Applies to: JS/TS scripts in Vue SFCs; examples show the relevant Options API or script setup form
Options: No rule-specific options. Severity and preset selection are configurable.

Configuration (Vite+)

import { defineConfig } from "@vizejs/vite-plugin/vite-plus";

export default defineConfig({
  lint: {
    vize: {
      "preset": "incremental",
      "rules": {
        "script/no-deprecated-props-default-this": "error"
      }
    },
  },
});

vp run lint

Bad

The prop default and validator read this, but those functions cannot rely on the component instance in Vue 3.

<script lang="ts">
export default {
props: {
size: {
type: Number,
// `this` is not the component instance in Vue 3.
default() {
return this.defaultSize
}
},
value: {
type: Number,
validator() {
return this.value > 0
}
}
}
}
</script>

Good

The default reads props.baseSize from its argument, and the validator tests its value argument. Both stop depending on an unavailable instance receiver.

<script lang="ts">
export default {
props: {
size: {
type: Number,
// Vue 3 passes the raw props as the first argument instead.
default(props) {
return props.baseSize
}
},
value: {
type: Number,
validator(value) {
return value > 0
}
}
}
}
</script>

Good avoids this rule's finding under the configuration above; other rules may still report diagnostics.

Implementation · All rules