js docstring example

1/**
2 * Foo takes any argument.
3 * The return value is 'baz' in all cases.
4 * @param {*} bar - Any argument
5 * @param {string} [optionalArg] - An optional argument that is a string
6 */
7function foo(bar, optionalArg) {
8  return 'baz';
9}