Error message in VueJS TypeScript: Implicit declaration of type 'props' as 'any'

Currently, I am working with vue 2.6 and typescript 3.8.3. The issue arises when I attempt to apply a validator to a prop.

I am encountering error message TS7006: Parameter 'props' implicitly has an 'any' type.

Below is the code snippet for my Vue single file component (SFC):

<template>
    <h1>{{propF}}</h1>
</template>

<script lang="ts">
import { defineComponent } from '@vue/composition-api'
export default defineComponent({
    props:{
        propF: {
            type: String,
            default: 'project',
            validator: (value) => {
                return ['project', 'global'].indexOf(value) !== -1
            }
        }
    },
    setup(props) {

        return {
            props
        }
    }
})
</script>

Answer №1

The issue regarding props being of type any actually stems from the untyped value argument in the validator function (which is currently set as unknown). By explicitly specifying the type of value as string to align with the propF type constructor (String), the problem can be resolved:

                     👇
validator: (value: string) => {/*...*/}

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