Function refreshStemChoiceVisuals

static/js/main.js:33–40

()

// Persisted across reloads so the next song honors the user's last
// chosen subset, but a 0-selection state is normalized to all 6.
function refreshStemChoiceVisuals() {
  for (const btn of document.querySelectorAll(".stem-choice[data-stem]")) {
    btn.setAttribute(
      "aria-pressed",
      String(selectedStems.has(btn.dataset.stem)),
    );
  }
}

function handleStemChoiceClick(stem) {
  const allSelected = selectedStems.size === STEM_NAMES.length;