How can I autoplay start or stop using local variable?

[HongsCode]

using typescipt,

I want to start or stop using local variable(autoplayBtn).
but testing my code, if autoplayBtn === false, working autoplay
why?

autoplay = {undefined} is not undefined...

below my code
<Swiper
autoplay = { autoplayBtn ? {delay:2000}:undefined}>
{[1,2,3].map((items, index) => {
return {item}
})}