https://irssi.org/_static/design-tabs.js

1var sd_labels_by_text = {};
2
3function ready() {
4  const li = document.getElementsByClassName("sd-tab-label");
5  for (const label of li) {
6    syncId = label.getAttribute("data-sync-id");
7    if (syncId) {
8      label.onclick = onLabelClick;
9      if (!sd_labels_by_text[syncId]) {
10        sd_labels_by_text[syncId] = [];
11      }
12      sd_labels_by_text[syncId].push(label);
13    }
14  }
15}
16
17function onLabelClick() {
18  // Activate other inputs with the same sync id.
19  syncId = this.getAttribute("data-sync-id");
20  for (label of sd_labels_by_text[syncId]) {
21    if (label === this) continue;
22    label.previousElementSibling.checked = true;
23  }
24  window.localStorage.setItem("sphinx-design-last-tab", syncId);
25}
26
27document.addEventListener("DOMContentLoaded", ready, false);