Function isBalanced

javascript/0110-balanced-binary-tree.js:7–14

(root)

 * @return {boolean}
 */
var isBalanced = function (root) {
    const isBaseCase = root === null;
    if (isBaseCase) return true;
    if (!isAcceptableHeight(root)) return false;
    if (!isChildBalanced(root)) return false;

    return true;
};

const isChildBalanced = (root) => {
    const left = isBalanced(root.left);