getElement and getElements

query-elements.js

// query-elements.js v1
function getElement(query, scope) {
	if (typeof scope === 'undefined') {
		scope = window.document;
	};
	if (typeof query === 'string') {
		return document.querySelector(query, scope);
	} else {
		throw new Error('The argument "query" must be String.');
	};
};

function getElements(query, scope) {
	if (typeof scope === 'undefined') {
		scope = window.document;
	};
	if (typeof query === 'string') {
		return document.querySelectorAll(query, scope);
	} else {
		throw new Error('The argument "query" must be String.');
	};
};