反应/错误：无法读取未定义的属性“addEventListener”

Question

I'm trying to find out where the error is coming from, I guess the useEffect() but as I am quite new with React, I'm taking a while to find it out and some help would be good. It is mapping an imported component (SliderTeaser).

Answer 1

change

const carousel = React.useRef();

in your Slider component to

const carousel = React.useRef(null);

as you can't attach the event listener to an undefined object, but a null object is not undefined.