Find element inside another element with class

getElementByClassName from particular element.js

                /**
                 * @description finds element by given classname inside the dom list of givent element
                 * NOTE its will return only one element 
                 * @param element <HTMLElement>
                 * @param className <String>
                 * @returns {*} <HTMLElement>
                 */
                function getElementByClassName(element, className) {
                    var foundedElement;

                    function findElement(element, className) {
                        var i,
                            length = element.childNodes.length;
                        if (foundedElement) {
                            return;
                        }
                        for (i = 0; i < length; i++) {
                            if (element.childNodes[i].nodeType && element.childNodes[i].nodeType === 1) {
                                if (element.childNodes[i].classList.contains(className)) {
                                    foundedElement = element.childNodes[i];
                                    break;
                                }
                                else {
                                    findElement(element.childNodes[i], className);
                                }
                            }
                        }
                    }
                    findElement(element, className);

                    return foundedElement;
                }