JavaScript querySelectorAll for all children and shadowRoot elements

deepQuerySelectorAll.js

function deepQuerySelectorAll(actual, selector){
    var results = [];

    // search for children
    if (actual.shadowRoot != null){
        deepQuerySelectorAll(actual.shadowRoot, selector).forEach( el => results.push(el));
    }
    
    if (actual.children !=null){
        Array.from(actual.children).forEach(
            child => {
                deepQuerySelectorAll(child, selector).forEach(el => results.push(el));
            }       
        );
    }
    // if we are finished, handle the parent
    if (results.length == 0){
        var foundElements = actual.querySelectorAll(selector);
        if (foundElements != null){
            Array.from(foundElements).forEach( el => results.push(el));
        }
    }
    return results;
}