geist-ui-svelte/dist/util/find-child.js

<img src="./src/lib/assets/demo-page.png">

export const findChild = (parent, fn) => {
    if (!parent)
        return undefined;
    const children = Array.from(parent.children);
    for (let i = 0; i < children.length; i++) {
        const child = children[i];
        if (fn(child))
            return child;
        if (child.children.length > 0) {
            const result = findChild(child, fn);
            if (result)
                return result;
        }
    }
    return undefined;
};