Similar to jQuery .closest() but traversing descendants?

Question

Is there a function similar to jQuery .closest() but for traversing descendants and returning only closest ones?

I know that there is

Answer 1

In case someone's looking for a pure JS solution (using ES6 instead of jQuery), here's the one I use:

Element.prototype.QuerySelector_BreadthFirst = function(selector) {
    let currentLayerElements = [...this.childNodes];
    while (currentLayerElements.length) {
        let firstMatchInLayer = currentLayerElements.find(a=>a.matches && a.matches(selector));
        if (firstMatchInLayer) return firstMatchInLayer;
        currentLayerElements = currentLayerElements.reduce((acc, item)=>acc.concat([...item.childNodes]), []);
    }
    return null;
};