@joist/element/target/lib/query-all.js

Intelligently apply styles to WebComponents

export function queryAll(query, root) {
    let res = null;
    return function (update) {
        if (res) {
            return patchNodes(res, update);
        }
        if (root) {
            res = root.querySelectorAll(query);
        }
        else if (this.shadowRoot) {
            res = this.shadowRoot.querySelectorAll(query);
        }
        else {
            res = this.querySelectorAll(query);
        }
        if (!res) {
            throw new Error(`could not find ${query}`);
        }
        return patchNodes(res, update);
    };
}
function patchNodes(target, update) {
    if (!update) {
        return target;
    }
    for (const node of target) {
        const patch = typeof update === "function" ? update(node) : update;
        if (patch) {
            for (const update in patch) {
                const newValue = patch[update];
                const oldValue = node[update];
                if (newValue !== oldValue) {
                    Reflect.set(node, update, newValue);
                }
            }
        }
    }
    return target;
}
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