class {
    onCreate() {
        this.state = {
            div: true
        };
    }
	onMount() {
		this.mouseMoveEvent = undefined;
	}

	handleMouseMove() {
		this.mouseMoveEvent = true;
	}
}

<if(state.div)>
    <div on-mousemove("handleMouseMove") key="root"/>
</if>
<else>
    <span on-mousemove("handleMouseMove") key="root"/>
</else>