Vue - Watch for slot content changes

slot.js

<script>
    export default {
        data() {
            return {
                hasSlotContent: false,
            }
        },
        methods: {
            checkForSlotContent() {
                let checkForContent = (hasContent, node) => {
                    return hasContent || node.tag || (node.text && node.text.trim());
                }
                return this.$slots.default && this.$slots.default.reduce(checkForContent, false);
            },
        },
        beforeUpdate() {
            this.hasSlotContent = this.checkForSlotContent();
        },
        created() {
            this.hasSlotContent = this.checkForSlotContent();
        }
    };
</script>