在 next.js 中，使用 css，当其父元素悬停在其上时，如何定位子元素？

Question

This is the css that targets the child element, "#overlay", when the parent, ".collection", is hovered.

.collection {
    position: relative;
    overflow: hidden;
}

.collection:hover #overlay { 
    position: absolute;
    opacity: .3;
}

This is the html:

import styles from "./Home.module.css";

<div className={`${styles.collection} card`}>
    <div id="overlay"></div>
</div>

The properties are not applied to the child element when the parent is hovered.

Answer 1

The problem is that by default Next.js uses css module when importing css from Components, that means that import of css will return an object with class & id map to uglified strings.

You need to use class selector and use it on the child component.

.collection {
    position: relative;
    overflow: hidden;
}

.collection:hover .overlay { 
    // -----------^
    position: absolute;
    opacity: .3;
}

import styles from "./Home.module.css";

<div className={`${styles.collection} card`}>
    <div id="overlay" className={styles.overlay}></div>
    // --------------------------------^
</div>