https://cryptography.io/en/latest/_static/tabs.js?v=3ee01567

1var labels_by_text = {};
2
3function ready() {
4  var li = document.getElementsByClassName("tab-label");
5  const urlParams = new URLSearchParams(window.location.search);
6  const tabs = urlParams.getAll("tabs");
7
8  for (const label of li) {
9    label.onclick = onLabelClick;
10    const text = label.textContent;
11    if (!labels_by_text[text]) {
12      labels_by_text[text] = [];
13    }
14    labels_by_text[text].push(label);
15  }
16
17  for (const tab of tabs) {
18    for (label of labels_by_text[tab]) {
19      label.previousSibling.checked = true;
20    }
21  }
22}
23
24function onLabelClick() {
25  // Activate other labels with the same text.
26  for (label of labels_by_text[this.textContent]) {
27    label.previousSibling.checked = true;
28  }
29}
30document.addEventListener("DOMContentLoaded", ready, false);