class {
    onCreate() {
        this.state = {
            swapped: false,
            count: 0
        };
    }
}

<div.root>
    <if(state.swapped)>
        <world count=state.count/>
        <hello count=state.count/>
    </if>
    <else>
        <hello count=state.count/>
        <world count=state.count/>
    </else>
</div>