function () {
    function validateParameter(param) {

        if (typeof param === 'undefined' || param === '' || param === null) {
            throw Error('Invalid function parameter');
        }

    }

    function validateElement(element) {

        validateParameter(element);

        if (typeof element !== 'object' && typeof element !== 'string') {
            throw Error('Invalid element');
        }

    }

    function validateContents(contents) {

        validateParameter(contents);

        if (typeof contents !== 'object') {
            throw Error('Invalid contents');
        }
        if (!Array.isArray(contents)) {
            throw Error('contents must be array');
        }
        contents.forEach(function (x) {
            if (typeof x !== 'string' && typeof x !== 'number') {
                throw Error('Invalid parameter in contents');
            }
        });
    }

    function getElement(element) {

        if (typeof element === 'string') {
            const el = document.getElementById(element);
            if (!el) {
                throw Error('Invalid id selector');
            }
            return el;
        }
        return element;
    }

    function appendContentsToElement(element, contents) {

        element.innerHTML = '';

        const docFr = document.createDocumentFragment();
        const div = document.createElement('div');

        contents.forEach(function (x) {
            const itemToAdd = div.cloneNode(true);
            itemToAdd.innerHTML += x;
            docFr.appendChild(itemToAdd);
        });

        element.appendChild(docFr);
    }

    return function (element, contents) {
        validateElement(element);
        validateContents(contents);
        element = getElement(element);
        appendContentsToElement(element, contents);
    };
};