server.ts

const getElementsAsync = (async (selector: string, section: ElementHandle | null, propertyName: string, page) =>
{
    let cubes: ElementHandle[] = [];
    if (section)
    {
        cubes = await section.$$(selector);
    }
    else
    {
        cubes = await page.$$(selector);
    }
    
    if (propertyName)
    {
        return await Promise.all(cubes.map(a=>getPropAsync(a,propertyName)));
    }
    else
    {
        return cubes;
    }
});