in content/assets/javascripts/paradox-material-theme.js [199:208]
dt.activate = function() {
dl.querySelectorAll(':scope .mdc-tab--active').forEach(active => {
active.classList.remove('mdc-tab--active')
})
contentContainer.querySelectorAll(':scope .mdc-tab-content--active').forEach(active => {
active.classList.remove('mdc-tab-content--active')
})
dt.classList.add('mdc-tab--active')
tabContent.classList.add('mdc-tab-content--active')
}