Vue-Rx prevents passing props as initial value to data

[19r3ka]

Ever since I added VueRx to my project, I noticed that I can no longer pass props as initial values to data objects like so:

data() { return { foo: this.bar } }, props: { bar: String }

The lack of VueRx documentation, i.e. cookbook recipes, guides, makes it very hard to use. I tried to pass props as initial data using Observables like so const data$ = merge(new Observable(), this.$watchAsObservable('propName')). It works but then there is no way to get back the new values from data$ once it is returned by this function and used as v-model inside the template.

<template>
    <child v-model="data$" />
</template>
<script>
    props: ['propName'],
    subscriptions() {
        const data$ = merge(new Observable(), this.$watchAsObservable('propName'))
       const foo$ = data$.pipe(map(doSomething)) <-- it will on run that doSomething function on the first emission and nothing else despite data$ value changing when monitored with Vue Devtools.

        return {...}
    }
</script>

I would have expected that data$ observable to stream data and be usable in the subscriptions function.