Audio component in Javascript with Vue3

I am trying to make a component in Vue3 to manage audio. This component will display a button that when pressed, plays an audio (just a short word) and changes the color (to show it is playing the audio).

Currently I managed to play the audio, but I have some issues that I am not sure how to resolve, which arise because I don't really understand how the Audio object works in javascript:

1. The class .playing is never applied to the element (isPlaying always returns false!)
2. How can I check the audio gets loaded before playing it? In case the URL is not reachable the .play() call should not be executed. But I am not sure canplaythrough event will work for me, since I just want to load the audio once (and only if the user presses the button).
3. What is the proper way of managing events for new Audio()? Try catch or I can do something with promises?
4. How to unmount this component correctly? this.audio.pause(); this.audio.src = null?

<template>
<button v-on:click="play" :class="{playing: isPlaying}">Audio</button>
</template>
<script>
export default {
    name: 'AudioComponent',
    data() {
        return {
            audio: null,
        }
    },
    props: {
        url: {type: String, required: true}
    },
    computed: {
        if(this.audio !== null){
            if(!this.audio.paused && this.audio.duration > 0){
                return true;
            }
        }
        return false;
    },
    methods: {
        play(){
            if(this.audio === null){
                this.audio = new Audio(this.url);
            }
            this.audio.play();
        }
    }
}
</script>
<style scoped>
.playing {
    color: green;
}
</style>

Note that this is a simplification of the code, but should be enough to see the issue. Since I couldn't find many examples using new Audio call I am wondering if I should use the DOM calls directly instead.

Note that I am using the options API but don't mind answers with composition API too.

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