Javascript search nested Array of Object

index.js

var body = {
	id: 'body',
	elements: [{
		id: 'abc',
		elements: []
	}, {
		id: 'def',
		elements: [{
			id: 'ghi',
			elements: [{
				id: 'jkl',
				elements: [{
					id: 'mno',
					elements: [{
						id: 'xxx',
						elements: []
					}, {
						id: 'nnn',
						elements: []
					}, {
						id: 'dkz',
						elements: [{
							id: 'oop',
							elements: []
						}, {
							id: 'uuu',
							elements: []
						}, {
							id: 'lol',
							elements: [{
								id: 'yuhu',
								elements: [{
									id: 'mamamia',
									elements: [{
										id: 'xxx',
										elements: []
									}, {
										id: 'popo',
										elements: [{
											id: 'el-mama',
											elements: [{
												id: 'endd',
												elements: []
											}, {
												id: 'nono',
												elements: [{
													id: 'hahuha',
													elements: []
												}]
											}]
										}]
									}]
								}]
							}]
						}]
					}]
				}]
			}, {
				id: 'haha',
				elements: []
			}, {
				id: 'saya',
				elements: []
			}]
		}]
	}, {
		id: 'xyz'
	}]
};

function findElement (root, id, fn) {
	if (root.elements) {
		var i = 0, len = root.elements.length
		for (;i<len;i++) {
			if (root.elements[i].id === id) fn && fn({parent: root, self: root.elements[i]})
			else findElement(root.elements[i], id, fn);
		}
	}
}