in site-ui/src/js/06-nav.js [73:80]
function revealNav (e) {
if (nav.classList.contains('is-active')) return hideNav(e)
document.documentElement.classList.add('is-clipped--nav')
nav.classList.add('is-active')
nav.addEventListener('click', concealEvent)
window.addEventListener('click', hideNav)
concealEvent(e) // NOTE don't let event get picked up by window click listener
}