GetTarget = function (element)
{
    var target;

    if (element !== '')
    {
        if (typeof element === 'string')
        {
            //  Hopefully an element ID
            target = document.getElementById(element);
        }
        else if (element && element.nodeType === 1)
        {
            //  Quick test for a HTMLElement
            target = element;
        }
    }

    //  Fallback to the document body. Covers an invalid ID and a non HTMLElement object.
    if (!target)
    {
        //  Use the full window
        target = document.body;
    }

    return target;
}
Attempts to get the target DOM element based on the given value, which can be either
a string, in which case it will be looked-up by ID, or an element node. If nothing
can be found it will return a reference to the document.body.

@function Phaser.DOM.GetTarget
@since 3.16.0

@param {HTMLElement} element - The DOM element to look-up.