Vue 3 Composition API Provide/Inject not working in Single File Components

Question

I'm making a library in VueJS 3 using Composition API. I implemented Provide/Inject as mentioned in docs. But the property in child component is still undefined and I get following error in browser console:

A very simple implementation of my code is as follow:

Usage In Project

<ThemeProvider>
    <Button color="green">
        ABC
    </Button>
</ThemeProvider>

<script>
    import { ThemeProvider, Button } from 'my-library'

    export default {
        name: 'SomePage',
        setup() {...},
    }
</script>

ThemeProvider.js (Parent Componen)

import { toRefs, reactive, provide, h } from 'vue'

export default {
    name: 'theme-provider',
    props:
        theme: {
            type: Object,
            default: () => ({...}),
        },
    },
    setup(props, { slots }) {
        const { theme } = toRefs(props)

        provide('theme', reactive(theme.value))

        return () =>
            h(
                'div',
                {...},
                slots.default()
            )
    },
}

Button.js (Child Component)

import { inject, h } from 'vue'

export default {
    name: 'Button',
    setup(props, { slots }) {
        const theme = inject('theme')
        console.log(theme)  // returns undefined

        return () =>
            h(
                'button',
                {...},
                slots.default()
            )
    },
}

Answer 1

For anyone having the same issue, the code had no problem. The problem was the difference in version for 'vue' and '@vue/compiler-sfc' (Vue compiler for Single File Component) in my package.json file.